/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:30:25,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:30:25,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:30:25,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 21:30:25,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 21:30:25,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 21:30:25,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 21:30:25,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 21:30:25,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 21:30:25,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 21:30:25,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 21:30:25,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 21:30:25,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:30:25,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:30:25,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:30:25,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:30:25,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:30:25,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:30:25,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:30:25,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:30:25,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:30:25,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:30:25,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:30:25,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:30:25,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 21:30:25,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 21:30:25,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 21:30:25,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 21:30:25,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 21:30:25,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 21:30:25,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 21:30:25,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 21:30:25,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 21:30:25,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:30:25,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:30:25,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:30:25,773 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 21:30:25,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:30:25,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:30:25,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:30:25,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:30:25,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:30:25,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:30:25,803 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:30:25,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:30:25,804 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:30:25,804 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:30:25,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:30:25,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:30:25,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:30:25,805 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:30:25,805 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:30:25,805 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:30:25,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:30:25,805 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:30:25,805 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:30:25,806 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:30:25,806 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:30:25,806 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:30:25,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:30:25,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:30:25,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:30:25,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:30:25,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:30:25,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:30:25,808 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:30:25,808 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:30:25,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:30:25,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:30:25,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:30:26,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:30:26,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:30:26,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:30:26,214 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:30:26,217 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:30:26,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2021-10-13 21:30:26,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5eff6e8b/0bc8f75d081348f89f6169723f53218c/FLAGd42e24a82 [2021-10-13 21:30:26,903 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:30:26,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2021-10-13 21:30:26,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5eff6e8b/0bc8f75d081348f89f6169723f53218c/FLAGd42e24a82 [2021-10-13 21:30:27,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5eff6e8b/0bc8f75d081348f89f6169723f53218c [2021-10-13 21:30:27,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:30:27,298 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:30:27,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:30:27,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:30:27,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:30:27,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@298acbaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27, skipping insertion in model container [2021-10-13 21:30:27,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:30:27,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:30:27,573 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2021-10-13 21:30:27,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:30:27,594 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:30:27,621 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2021-10-13 21:30:27,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:30:27,641 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:30:27,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27 WrapperNode [2021-10-13 21:30:27,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:30:27,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:30:27,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:30:27,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:30:27,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:30:27,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:30:27,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:30:27,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:30:27,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:30:27,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:30:27,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:30:27,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:30:27,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (1/1) ... [2021-10-13 21:30:27,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:30:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:30:27,805 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 21:30:27,821 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 21:30:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:30:27,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:30:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:30:27,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:30:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 21:30:27,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 21:30:27,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:30:27,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-13 21:30:27,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-13 21:30:27,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:30:27,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 21:30:27,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 21:30:27,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:30:27,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:30:27,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:30:27,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:30:27,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:30:27,879 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 21:30:28,713 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:30:28,714 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-13 21:30:28,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:30:28 BoogieIcfgContainer [2021-10-13 21:30:28,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:30:28,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:30:28,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:30:28,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:30:28,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:30:27" (1/3) ... [2021-10-13 21:30:28,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195fde7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:30:28, skipping insertion in model container [2021-10-13 21:30:28,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:27" (2/3) ... [2021-10-13 21:30:28,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195fde7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:30:28, skipping insertion in model container [2021-10-13 21:30:28,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:30:28" (3/3) ... [2021-10-13 21:30:28,727 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2021-10-13 21:30:28,733 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:30:28,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-13 21:30:28,733 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:30:28,769 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,770 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,770 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,770 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,770 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,771 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,771 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,771 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,772 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,772 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,772 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,772 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,772 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,773 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,773 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,773 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,773 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,773 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,773 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,774 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,774 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,774 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,775 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,775 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,775 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,775 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,775 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,776 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,776 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,776 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,777 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,777 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,777 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,777 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,777 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,777 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,778 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,778 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,778 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,778 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,781 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,782 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,782 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,782 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,784 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,785 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,785 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,785 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,787 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,787 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,787 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,787 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,788 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,788 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,789 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,790 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,790 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,790 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,790 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,791 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:30:28,801 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-13 21:30:28,853 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:30:28,860 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 21:30:28,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-13 21:30:28,878 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:30:28,889 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 139 transitions, 310 flow [2021-10-13 21:30:28,892 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 139 transitions, 310 flow [2021-10-13 21:30:28,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 142 places, 139 transitions, 310 flow [2021-10-13 21:30:28,953 INFO L129 PetriNetUnfolder]: 10/135 cut-off events. [2021-10-13 21:30:28,953 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-13 21:30:28,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 135 events. 10/135 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2021-10-13 21:30:28,962 INFO L116 LiptonReduction]: Number of co-enabled transitions 1608 [2021-10-13 21:30:46,978 INFO L131 LiptonReduction]: Checked pairs total: 2094 [2021-10-13 21:30:46,978 INFO L133 LiptonReduction]: Total number of compositions: 129 [2021-10-13 21:30:46,990 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 47 transitions, 126 flow [2021-10-13 21:30:47,024 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-13 21:30:47,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:47,035 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-13 21:30:47,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash 577, now seen corresponding path program 1 times [2021-10-13 21:30:47,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:47,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135328959] [2021-10-13 21:30:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:47,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:47,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:47,057 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 21:30:47,066 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 21:30:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:47,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 21:30:47,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:47,134 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 21:30:47,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:47,135 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 21:30:47,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:47,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135328959] [2021-10-13 21:30:47,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135328959] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:47,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:47,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-13 21:30:47,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064008480] [2021-10-13 21:30:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 21:30:47,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 21:30:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 21:30:47,166 INFO L87 Difference]: Start difference. First operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:47,195 INFO L93 Difference]: Finished difference Result 180 states and 692 transitions. [2021-10-13 21:30:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 21:30:47,200 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 21:30:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:47,226 INFO L225 Difference]: With dead ends: 180 [2021-10-13 21:30:47,226 INFO L226 Difference]: Without dead ends: 180 [2021-10-13 21:30:47,227 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 21:30:47,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-13 21:30:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-10-13 21:30:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 4.193939393939394) internal successors, (692), 179 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 692 transitions. [2021-10-13 21:30:47,301 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 692 transitions. Word has length 1 [2021-10-13 21:30:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:47,302 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 692 transitions. [2021-10-13 21:30:47,302 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 21:30:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 692 transitions. [2021-10-13 21:30:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:30:47,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:47,303 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:30:47,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 21:30:47,506 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 21:30:47,506 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash 569620, now seen corresponding path program 1 times [2021-10-13 21:30:47,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:47,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494927923] [2021-10-13 21:30:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:47,509 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:47,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:30:47,513 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 21:30:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:30:47,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:47,976 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:30:47,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 157 treesize of output 194 [2021-10-13 21:30:52,130 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 21:30:52,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:30:52,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:52,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494927923] [2021-10-13 21:30:52,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494927923] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:52,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:52,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:30:52,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821709426] [2021-10-13 21:30:52,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:30:52,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:52,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:30:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:52,151 INFO L87 Difference]: Start difference. First operand 180 states and 692 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:52,246 INFO L93 Difference]: Finished difference Result 170 states and 656 transitions. [2021-10-13 21:30:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:52,247 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 21:30:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:52,250 INFO L225 Difference]: With dead ends: 170 [2021-10-13 21:30:52,250 INFO L226 Difference]: Without dead ends: 170 [2021-10-13 21:30:52,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-13 21:30:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-13 21:30:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 157 states have (on average 4.178343949044586) internal successors, (656), 169 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 656 transitions. [2021-10-13 21:30:52,283 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 656 transitions. Word has length 3 [2021-10-13 21:30:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:52,284 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 656 transitions. [2021-10-13 21:30:52,284 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 21:30:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 656 transitions. [2021-10-13 21:30:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:30:52,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:52,285 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:30:52,300 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 21:30:52,496 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 21:30:52,497 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:52,499 INFO L82 PathProgramCache]: Analyzing trace with hash 569621, now seen corresponding path program 1 times [2021-10-13 21:30:52,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:52,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800988236] [2021-10-13 21:30:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:52,500 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:52,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:52,504 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 21:30:52,505 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 21:30:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:30:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:52,776 INFO L354 Elim1Store]: treesize reduction 237, result has 17.1 percent of original size [2021-10-13 21:30:52,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 76 [2021-10-13 21:30:52,798 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 103 treesize of output 101 [2021-10-13 21:30:53,951 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 21:30:53,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:53,999 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 21:30:54,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:54,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800988236] [2021-10-13 21:30:54,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800988236] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:54,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:54,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:30:54,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562289599] [2021-10-13 21:30:54,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:30:54,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:30:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:54,003 INFO L87 Difference]: Start difference. First operand 170 states and 656 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:54,071 INFO L93 Difference]: Finished difference Result 160 states and 620 transitions. [2021-10-13 21:30:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:54,072 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 21:30:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:54,075 INFO L225 Difference]: With dead ends: 160 [2021-10-13 21:30:54,075 INFO L226 Difference]: Without dead ends: 160 [2021-10-13 21:30:54,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-13 21:30:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-10-13 21:30:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 149 states have (on average 4.1610738255033555) internal successors, (620), 159 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 620 transitions. [2021-10-13 21:30:54,093 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 620 transitions. Word has length 3 [2021-10-13 21:30:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:54,094 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 620 transitions. [2021-10-13 21:30:54,094 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 21:30:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 620 transitions. [2021-10-13 21:30:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:30:54,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:54,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:30:54,109 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 21:30:54,306 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 21:30:54,307 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:54,308 INFO L82 PathProgramCache]: Analyzing trace with hash 547420073, now seen corresponding path program 1 times [2021-10-13 21:30:54,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:54,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203838301] [2021-10-13 21:30:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:54,310 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:54,311 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 21:30:54,322 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 21:30:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:30:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:54,616 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:30:54,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-13 21:30:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:30:55,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:55,144 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 21:30:55,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:55,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203838301] [2021-10-13 21:30:55,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203838301] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:55,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:55,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:30:55,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598291832] [2021-10-13 21:30:55,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:30:55,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:55,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:30:55,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:30:55,147 INFO L87 Difference]: Start difference. First operand 160 states and 620 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 21:30:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:55,198 INFO L93 Difference]: Finished difference Result 152 states and 596 transitions. [2021-10-13 21:30:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:55,199 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 21:30:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:55,201 INFO L225 Difference]: With dead ends: 152 [2021-10-13 21:30:55,201 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 21:30:55,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:30:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 21:30:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-13 21:30:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 4.1678321678321675) internal successors, (596), 151 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 596 transitions. [2021-10-13 21:30:55,213 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 596 transitions. Word has length 5 [2021-10-13 21:30:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:55,214 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 596 transitions. [2021-10-13 21:30:55,214 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 21:30:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 596 transitions. [2021-10-13 21:30:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:30:55,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:55,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:30:55,228 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 21:30:55,431 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 21:30:55,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 547420074, now seen corresponding path program 1 times [2021-10-13 21:30:55,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:55,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815861173] [2021-10-13 21:30:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:55,434 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:55,436 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 21:30:55,468 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 21:30:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:30:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:55,724 INFO L354 Elim1Store]: treesize reduction 237, result has 17.1 percent of original size [2021-10-13 21:30:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 78 [2021-10-13 21:30:55,733 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 163 treesize of output 159 [2021-10-13 21:30:56,430 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 21:30:56,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:56,502 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 21:30:56,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:56,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815861173] [2021-10-13 21:30:56,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815861173] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:56,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:56,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:30:56,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672658967] [2021-10-13 21:30:56,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:30:56,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:30:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:56,505 INFO L87 Difference]: Start difference. First operand 152 states and 596 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:56,556 INFO L93 Difference]: Finished difference Result 144 states and 572 transitions. [2021-10-13 21:30:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:56,557 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 21:30:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:56,559 INFO L225 Difference]: With dead ends: 144 [2021-10-13 21:30:56,559 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 21:30:56,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 21:30:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-13 21:30:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 4.175182481751825) internal successors, (572), 143 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 572 transitions. [2021-10-13 21:30:56,569 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 572 transitions. Word has length 5 [2021-10-13 21:30:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:56,569 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 572 transitions. [2021-10-13 21:30:56,570 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 21:30:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 572 transitions. [2021-10-13 21:30:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:30:56,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:56,570 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:56,584 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 21:30:56,782 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 21:30:56,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2084695223, now seen corresponding path program 1 times [2021-10-13 21:30:56,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:56,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550701828] [2021-10-13 21:30:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:56,787 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:56,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:56,788 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 21:30:56,789 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 21:30:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:30:56,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:57,076 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:30:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-13 21:30:57,624 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 21:30:57,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:57,643 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 21:30:57,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:57,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550701828] [2021-10-13 21:30:57,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550701828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:57,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:57,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:30:57,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425053508] [2021-10-13 21:30:57,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:30:57,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:57,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:30:57,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:30:57,646 INFO L87 Difference]: Start difference. First operand 144 states and 572 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:57,685 INFO L93 Difference]: Finished difference Result 134 states and 536 transitions. [2021-10-13 21:30:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:30:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:57,688 INFO L225 Difference]: With dead ends: 134 [2021-10-13 21:30:57,688 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 21:30:57,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:30:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 21:30:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-13 21:30:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 4.155038759689923) internal successors, (536), 133 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 536 transitions. [2021-10-13 21:30:57,696 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 536 transitions. Word has length 7 [2021-10-13 21:30:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:57,696 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 536 transitions. [2021-10-13 21:30:57,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 536 transitions. [2021-10-13 21:30:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:30:57,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:57,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:57,713 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 21:30:57,911 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 21:30:57,912 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2084695225, now seen corresponding path program 1 times [2021-10-13 21:30:57,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:57,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949573550] [2021-10-13 21:30:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:57,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:57,917 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 21:30:57,920 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 21:30:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:30:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:58,181 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 21:30:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 60 [2021-10-13 21:30:58,284 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 21:30:58,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:58,367 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 21:30:58,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:58,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949573550] [2021-10-13 21:30:58,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949573550] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:58,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:58,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:30:58,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575717705] [2021-10-13 21:30:58,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:30:58,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:30:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:58,370 INFO L87 Difference]: Start difference. First operand 134 states and 536 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:58,402 INFO L93 Difference]: Finished difference Result 124 states and 500 transitions. [2021-10-13 21:30:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:58,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:30:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:58,405 INFO L225 Difference]: With dead ends: 124 [2021-10-13 21:30:58,405 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 21:30:58,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 21:30:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-13 21:30:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 4.132231404958677) internal successors, (500), 123 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 500 transitions. [2021-10-13 21:30:58,413 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 500 transitions. Word has length 7 [2021-10-13 21:30:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:58,413 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 500 transitions. [2021-10-13 21:30:58,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 500 transitions. [2021-10-13 21:30:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:30:58,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:58,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:58,430 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 21:30:58,627 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 21:30:58,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1937363690, now seen corresponding path program 1 times [2021-10-13 21:30:58,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:58,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4622891] [2021-10-13 21:30:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:58,630 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:58,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:58,631 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 21:30:58,632 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 21:30:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:30:58,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:58,933 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:30:58,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-13 21:30:59,373 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 21:30:59,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:59,457 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 21:30:59,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:59,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4622891] [2021-10-13 21:30:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4622891] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:59,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:59,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 21:30:59,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780683669] [2021-10-13 21:30:59,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 21:30:59,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 21:30:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:30:59,460 INFO L87 Difference]: Start difference. First operand 124 states and 500 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:59,511 INFO L93 Difference]: Finished difference Result 108 states and 420 transitions. [2021-10-13 21:30:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 21:30:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:59,514 INFO L225 Difference]: With dead ends: 108 [2021-10-13 21:30:59,514 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 21:30:59,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:30:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 21:30:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-13 21:30:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 3.9622641509433962) internal successors, (420), 107 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 420 transitions. [2021-10-13 21:30:59,520 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 420 transitions. Word has length 9 [2021-10-13 21:30:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:59,520 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 420 transitions. [2021-10-13 21:30:59,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 420 transitions. [2021-10-13 21:30:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:30:59,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:59,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:59,539 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 21:30:59,734 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 21:30:59,734 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:30:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1937363692, now seen corresponding path program 1 times [2021-10-13 21:30:59,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:59,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335798640] [2021-10-13 21:30:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:59,736 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:59,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:59,737 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 21:30:59,773 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 21:30:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:59,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:30:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:59,953 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 21:30:59,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:00,038 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 21:31:00,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:00,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335798640] [2021-10-13 21:31:00,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335798640] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:31:00,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:31:00,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:31:00,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262886940] [2021-10-13 21:31:00,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:31:00,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:31:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:31:00,040 INFO L87 Difference]: Start difference. First operand 108 states and 420 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 21:31:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:00,082 INFO L93 Difference]: Finished difference Result 92 states and 340 transitions. [2021-10-13 21:31:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:31:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 21:31:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:00,084 INFO L225 Difference]: With dead ends: 92 [2021-10-13 21:31:00,084 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 21:31:00,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:31:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 21:31:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-13 21:31:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 340 transitions. [2021-10-13 21:31:00,089 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 340 transitions. Word has length 9 [2021-10-13 21:31:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:00,089 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 340 transitions. [2021-10-13 21:31:00,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 21:31:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 340 transitions. [2021-10-13 21:31:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:31:00,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:00,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:00,102 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 21:31:00,297 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 21:31:00,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:00,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1521879548, now seen corresponding path program 1 times [2021-10-13 21:31:00,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:00,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132777216] [2021-10-13 21:31:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:00,300 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:00,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:00,302 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 21:31:00,303 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 21:31:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:31:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:00,459 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 21:31:00,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:00,516 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 21:31:00,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:00,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132777216] [2021-10-13 21:31:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132777216] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:31:00,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:31:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:31:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530937591] [2021-10-13 21:31:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:31:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:31:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:31:00,519 INFO L87 Difference]: Start difference. First operand 92 states and 340 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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 21:31:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:00,546 INFO L93 Difference]: Finished difference Result 181 states and 611 transitions. [2021-10-13 21:31:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:31:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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 21 [2021-10-13 21:31:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:00,549 INFO L225 Difference]: With dead ends: 181 [2021-10-13 21:31:00,549 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 21:31:00,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:31:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 21:31:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-13 21:31:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.4966887417218544) internal successors, (528), 151 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 21:31:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 528 transitions. [2021-10-13 21:31:00,562 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 528 transitions. Word has length 21 [2021-10-13 21:31:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:00,563 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 528 transitions. [2021-10-13 21:31:00,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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 21:31:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 528 transitions. [2021-10-13 21:31:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:00,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:00,572 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:00,585 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 21:31:00,784 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 21:31:00,785 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -668011427, now seen corresponding path program 1 times [2021-10-13 21:31:00,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:00,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284298699] [2021-10-13 21:31:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:00,788 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:00,789 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 21:31:00,790 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 21:31:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:00,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:31:00,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:01,031 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 21:31:01,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:01,225 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 21:31:01,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:01,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284298699] [2021-10-13 21:31:01,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284298699] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:31:01,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:31:01,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-13 21:31:01,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853467634] [2021-10-13 21:31:01,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:31:01,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:31:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:31:01,228 INFO L87 Difference]: Start difference. First operand 152 states and 528 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:01,308 INFO L93 Difference]: Finished difference Result 152 states and 492 transitions. [2021-10-13 21:31:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:31:01,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:31:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:01,311 INFO L225 Difference]: With dead ends: 152 [2021-10-13 21:31:01,311 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 21:31:01,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:31:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 21:31:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-13 21:31:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 3.63302752293578) internal successors, (396), 109 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 21:31:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 396 transitions. [2021-10-13 21:31:01,317 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 396 transitions. Word has length 22 [2021-10-13 21:31:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:01,317 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 396 transitions. [2021-10-13 21:31:01,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 396 transitions. [2021-10-13 21:31:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:01,319 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:01,319 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:01,331 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 21:31:01,531 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 21:31:01,531 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1587679495, now seen corresponding path program 1 times [2021-10-13 21:31:01,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:01,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412790675] [2021-10-13 21:31:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:01,534 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:01,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:01,536 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 21:31:01,538 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 21:31:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:01,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:31:01,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:01,839 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 21:31:01,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:02,017 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 21:31:02,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:02,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412790675] [2021-10-13 21:31:02,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412790675] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:02,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:02,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 21:31:02,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434363294] [2021-10-13 21:31:02,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:31:02,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:31:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:31:02,020 INFO L87 Difference]: Start difference. First operand 110 states and 396 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:02,167 INFO L93 Difference]: Finished difference Result 532 states and 1950 transitions. [2021-10-13 21:31:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:31:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:31:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:02,173 INFO L225 Difference]: With dead ends: 532 [2021-10-13 21:31:02,173 INFO L226 Difference]: Without dead ends: 532 [2021-10-13 21:31:02,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:31:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-10-13 21:31:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 202. [2021-10-13 21:31:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 4.3283582089552235) internal successors, (870), 201 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 21:31:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 870 transitions. [2021-10-13 21:31:02,190 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 870 transitions. Word has length 22 [2021-10-13 21:31:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:02,191 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 870 transitions. [2021-10-13 21:31:02,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 870 transitions. [2021-10-13 21:31:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:02,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:02,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:02,205 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 21:31:02,405 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 21:31:02,405 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:02,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:02,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1743600199, now seen corresponding path program 2 times [2021-10-13 21:31:02,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:02,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727318972] [2021-10-13 21:31:02,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:02,407 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:02,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:02,408 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 21:31:02,409 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 21:31:02,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:02,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:31:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:02,898 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 21:31:02,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:03,159 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 21:31:03,160 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:03,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727318972] [2021-10-13 21:31:03,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727318972] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:03,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:03,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 21:31:03,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426700808] [2021-10-13 21:31:03,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:31:03,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:31:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:31:03,165 INFO L87 Difference]: Start difference. First operand 202 states and 870 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:03,330 INFO L93 Difference]: Finished difference Result 736 states and 3034 transitions. [2021-10-13 21:31:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:31:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:31:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:03,339 INFO L225 Difference]: With dead ends: 736 [2021-10-13 21:31:03,339 INFO L226 Difference]: Without dead ends: 736 [2021-10-13 21:31:03,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:31:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-10-13 21:31:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 352. [2021-10-13 21:31:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 4.769230769230769) internal successors, (1674), 351 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states 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 21:31:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1674 transitions. [2021-10-13 21:31:03,365 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1674 transitions. Word has length 22 [2021-10-13 21:31:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:03,366 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1674 transitions. [2021-10-13 21:31:03,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1674 transitions. [2021-10-13 21:31:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:03,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:03,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:03,389 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 21:31:03,581 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 21:31:03,582 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash -103768713, now seen corresponding path program 2 times [2021-10-13 21:31:03,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:03,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825379615] [2021-10-13 21:31:03,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:03,583 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:03,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:03,584 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 21:31:03,621 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 21:31:03,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:31:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:04,091 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 21:31:04,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:04,392 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 21:31:04,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:04,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825379615] [2021-10-13 21:31:04,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825379615] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:04,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:04,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 21:31:04,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354453306] [2021-10-13 21:31:04,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:31:04,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:04,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:31:04,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:31:04,394 INFO L87 Difference]: Start difference. First operand 352 states and 1674 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:04,591 INFO L93 Difference]: Finished difference Result 1258 states and 5658 transitions. [2021-10-13 21:31:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:31:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:31:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:04,606 INFO L225 Difference]: With dead ends: 1258 [2021-10-13 21:31:04,607 INFO L226 Difference]: Without dead ends: 1258 [2021-10-13 21:31:04,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:31:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-10-13 21:31:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 554. [2021-10-13 21:31:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 5.394213381555153) internal successors, (2983), 553 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states 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 21:31:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 2983 transitions. [2021-10-13 21:31:04,647 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 2983 transitions. Word has length 22 [2021-10-13 21:31:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:04,647 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 2983 transitions. [2021-10-13 21:31:04,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 2983 transitions. [2021-10-13 21:31:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:04,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:04,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:04,664 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 21:31:04,864 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 21:31:04,865 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:04,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1802789577, now seen corresponding path program 3 times [2021-10-13 21:31:04,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:04,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785275745] [2021-10-13 21:31:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:04,867 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:04,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:04,868 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 21:31:04,870 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 21:31:05,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:05,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:31:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:05,300 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 21:31:05,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:05,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:05,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785275745] [2021-10-13 21:31:05,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785275745] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:31:05,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:31:05,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-13 21:31:05,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756703610] [2021-10-13 21:31:05,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:31:05,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:31:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:31:05,593 INFO L87 Difference]: Start difference. First operand 554 states and 2983 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:05,675 INFO L93 Difference]: Finished difference Result 664 states and 3308 transitions. [2021-10-13 21:31:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:31:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:31:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:05,700 INFO L225 Difference]: With dead ends: 664 [2021-10-13 21:31:05,701 INFO L226 Difference]: Without dead ends: 602 [2021-10-13 21:31:05,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:31:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-10-13 21:31:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 570. [2021-10-13 21:31:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 5.263620386643233) internal successors, (2995), 569 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states 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 21:31:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 2995 transitions. [2021-10-13 21:31:05,733 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 2995 transitions. Word has length 22 [2021-10-13 21:31:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:05,733 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 2995 transitions. [2021-10-13 21:31:05,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 2995 transitions. [2021-10-13 21:31:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:05,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:05,738 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:05,752 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 21:31:05,952 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 21:31:05,953 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1791113141, now seen corresponding path program 3 times [2021-10-13 21:31:05,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:05,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11365267] [2021-10-13 21:31:05,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:05,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:05,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:05,956 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 21:31:05,989 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 21:31:06,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:31:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:06,341 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 21:31:06,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:06,597 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 21:31:06,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:06,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11365267] [2021-10-13 21:31:06,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11365267] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:31:06,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:31:06,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-13 21:31:06,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697680276] [2021-10-13 21:31:06,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:31:06,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:06,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:31:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:31:06,599 INFO L87 Difference]: Start difference. First operand 570 states and 2995 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:06,656 INFO L93 Difference]: Finished difference Result 608 states and 3092 transitions. [2021-10-13 21:31:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:31:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:31:06,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:06,664 INFO L225 Difference]: With dead ends: 608 [2021-10-13 21:31:06,664 INFO L226 Difference]: Without dead ends: 550 [2021-10-13 21:31:06,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:31:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-10-13 21:31:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-10-13 21:31:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 5.222222222222222) internal successors, (2867), 549 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states 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 21:31:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 2867 transitions. [2021-10-13 21:31:06,692 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 2867 transitions. Word has length 22 [2021-10-13 21:31:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:06,692 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 2867 transitions. [2021-10-13 21:31:06,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 2867 transitions. [2021-10-13 21:31:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:31:06,695 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:06,695 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:06,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:06,908 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 21:31:06,909 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash 945277358, now seen corresponding path program 1 times [2021-10-13 21:31:06,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:06,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108245371] [2021-10-13 21:31:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:06,912 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:06,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:06,913 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 21:31:06,915 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 21:31:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:07,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:31:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:07,165 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 21:31:07,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:07,233 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 21:31:07,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:07,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108245371] [2021-10-13 21:31:07,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108245371] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:07,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:07,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-10-13 21:31:07,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904322870] [2021-10-13 21:31:07,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:31:07,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:07,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:31:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:31:07,235 INFO L87 Difference]: Start difference. First operand 550 states and 2867 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 21:31:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:07,317 INFO L93 Difference]: Finished difference Result 1283 states and 6063 transitions. [2021-10-13 21:31:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:31:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-10-13 21:31:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:07,332 INFO L225 Difference]: With dead ends: 1283 [2021-10-13 21:31:07,332 INFO L226 Difference]: Without dead ends: 1202 [2021-10-13 21:31:07,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:31:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-10-13 21:31:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1120. [2021-10-13 21:31:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 4.861483467381591) internal successors, (5440), 1119 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states 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 21:31:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 5440 transitions. [2021-10-13 21:31:07,391 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 5440 transitions. Word has length 23 [2021-10-13 21:31:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:07,392 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 5440 transitions. [2021-10-13 21:31:07,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 21:31:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 5440 transitions. [2021-10-13 21:31:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:07,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:07,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:07,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-13 21:31:07,613 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 21:31:07,613 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1805301455, now seen corresponding path program 1 times [2021-10-13 21:31:07,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:07,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603785000] [2021-10-13 21:31:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:07,616 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:07,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:07,618 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 21:31:07,622 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 21:31:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:31:07,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:31:08,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:08,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:08,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603785000] [2021-10-13 21:31:08,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603785000] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:31:08,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:31:08,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-13 21:31:08,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361457649] [2021-10-13 21:31:08,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:31:08,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:31:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:31:08,231 INFO L87 Difference]: Start difference. First operand 1120 states and 5440 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:08,325 INFO L93 Difference]: Finished difference Result 1126 states and 5422 transitions. [2021-10-13 21:31:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:31:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:08,339 INFO L225 Difference]: With dead ends: 1126 [2021-10-13 21:31:08,339 INFO L226 Difference]: Without dead ends: 1104 [2021-10-13 21:31:08,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:31:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-10-13 21:31:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2021-10-13 21:31:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 4.86219401631913) internal successors, (5363), 1103 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states 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 21:31:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 5363 transitions. [2021-10-13 21:31:08,394 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 5363 transitions. Word has length 24 [2021-10-13 21:31:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:08,394 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 5363 transitions. [2021-10-13 21:31:08,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 5363 transitions. [2021-10-13 21:31:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:08,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:08,400 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:08,413 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 21:31:08,613 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 21:31:08,614 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 363437079, now seen corresponding path program 1 times [2021-10-13 21:31:08,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:08,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935166789] [2021-10-13 21:31:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:08,616 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:08,618 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 21:31:08,624 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 21:31:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:31:08,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:09,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:09,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:09,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935166789] [2021-10-13 21:31:09,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935166789] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:09,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:09,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:31:09,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265724471] [2021-10-13 21:31:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:31:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:09,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:31:09,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:31:09,386 INFO L87 Difference]: Start difference. First operand 1104 states and 5363 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:09,675 INFO L93 Difference]: Finished difference Result 2574 states and 11119 transitions. [2021-10-13 21:31:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:31:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:09,702 INFO L225 Difference]: With dead ends: 2574 [2021-10-13 21:31:09,703 INFO L226 Difference]: Without dead ends: 2526 [2021-10-13 21:31:09,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-10-13 21:31:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 1452. [2021-10-13 21:31:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 4.851137146795313) internal successors, (7039), 1451 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states 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 21:31:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 7039 transitions. [2021-10-13 21:31:09,801 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 7039 transitions. Word has length 24 [2021-10-13 21:31:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:09,802 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 7039 transitions. [2021-10-13 21:31:09,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 7039 transitions. [2021-10-13 21:31:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:09,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:09,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:09,830 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 21:31:10,025 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 21:31:10,026 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:10,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1561218207, now seen corresponding path program 2 times [2021-10-13 21:31:10,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:10,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616188831] [2021-10-13 21:31:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:10,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:10,029 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 21:31:10,033 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 21:31:10,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:10,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:31:10,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:10,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:10,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:10,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616188831] [2021-10-13 21:31:10,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616188831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:10,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:10,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-10-13 21:31:10,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739740264] [2021-10-13 21:31:10,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:31:10,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:31:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:31:10,940 INFO L87 Difference]: Start difference. First operand 1452 states and 7039 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:11,427 INFO L93 Difference]: Finished difference Result 3386 states and 14760 transitions. [2021-10-13 21:31:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 21:31:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:11,475 INFO L225 Difference]: With dead ends: 3386 [2021-10-13 21:31:11,475 INFO L226 Difference]: Without dead ends: 3358 [2021-10-13 21:31:11,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:31:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-10-13 21:31:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 1812. [2021-10-13 21:31:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 4.9491993373826615) internal successors, (8963), 1811 states have internal predecessors, (8963), 0 states have call successors, (0), 0 states 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 21:31:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 8963 transitions. [2021-10-13 21:31:11,629 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 8963 transitions. Word has length 24 [2021-10-13 21:31:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:11,629 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 8963 transitions. [2021-10-13 21:31:11,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 8963 transitions. [2021-10-13 21:31:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 21:31:11,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:11,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:11,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:11,853 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 21:31:11,853 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:11,854 INFO L82 PathProgramCache]: Analyzing trace with hash 748623753, now seen corresponding path program 1 times [2021-10-13 21:31:11,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:11,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565272258] [2021-10-13 21:31:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:11,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:11,856 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 21:31:11,889 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 21:31:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:31:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:12,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:12,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:12,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565272258] [2021-10-13 21:31:12,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565272258] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:12,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:12,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-13 21:31:12,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613799544] [2021-10-13 21:31:12,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 21:31:12,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 21:31:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:31:12,242 INFO L87 Difference]: Start difference. First operand 1812 states and 8963 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:12,345 INFO L93 Difference]: Finished difference Result 3517 states and 16969 transitions. [2021-10-13 21:31:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:31:12,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 21:31:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:12,367 INFO L225 Difference]: With dead ends: 3517 [2021-10-13 21:31:12,368 INFO L226 Difference]: Without dead ends: 3316 [2021-10-13 21:31:12,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:31:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-10-13 21:31:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 2364. [2021-10-13 21:31:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 5.0215827338129495) internal successors, (11866), 2363 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states 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 21:31:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 11866 transitions. [2021-10-13 21:31:12,525 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 11866 transitions. Word has length 25 [2021-10-13 21:31:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:12,526 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 11866 transitions. [2021-10-13 21:31:12,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 11866 transitions. [2021-10-13 21:31:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:12,538 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:12,538 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:12,552 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 21:31:12,751 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 21:31:12,752 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash 956289468, now seen corresponding path program 2 times [2021-10-13 21:31:12,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:12,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118304713] [2021-10-13 21:31:12,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:12,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:12,755 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 21:31:12,756 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 21:31:13,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:31:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:13,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:13,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:13,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118304713] [2021-10-13 21:31:13,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118304713] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:13,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:13,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 21:31:13,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354387986] [2021-10-13 21:31:13,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:31:13,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:31:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:13,912 INFO L87 Difference]: Start difference. First operand 2364 states and 11866 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:15,040 INFO L93 Difference]: Finished difference Result 5456 states and 23551 transitions. [2021-10-13 21:31:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:31:15,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:15,069 INFO L225 Difference]: With dead ends: 5456 [2021-10-13 21:31:15,069 INFO L226 Difference]: Without dead ends: 5364 [2021-10-13 21:31:15,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-10-13 21:31:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-10-13 21:31:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 2270. [2021-10-13 21:31:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 4.899515204936095) internal successors, (11117), 2269 states have internal predecessors, (11117), 0 states have call successors, (0), 0 states 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 21:31:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 11117 transitions. [2021-10-13 21:31:15,287 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 11117 transitions. Word has length 26 [2021-10-13 21:31:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:15,288 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 11117 transitions. [2021-10-13 21:31:15,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 11117 transitions. [2021-10-13 21:31:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:15,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:15,297 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:15,313 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 21:31:15,510 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 21:31:15,511 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:15,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2061881588, now seen corresponding path program 3 times [2021-10-13 21:31:15,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:15,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929308722] [2021-10-13 21:31:15,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:15,513 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:15,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:15,514 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 21:31:15,515 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 21:31:15,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:15,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:15,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:31:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:31:16,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:31:16,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:16,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929308722] [2021-10-13 21:31:16,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929308722] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:16,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:16,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:31:16,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767786030] [2021-10-13 21:31:16,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:31:16,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:31:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:31:16,308 INFO L87 Difference]: Start difference. First operand 2270 states and 11117 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:16,933 INFO L93 Difference]: Finished difference Result 4146 states and 18252 transitions. [2021-10-13 21:31:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 21:31:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:16,957 INFO L225 Difference]: With dead ends: 4146 [2021-10-13 21:31:16,957 INFO L226 Difference]: Without dead ends: 3814 [2021-10-13 21:31:16,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:31:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2021-10-13 21:31:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 2714. [2021-10-13 21:31:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 4.845558422410615) internal successors, (13146), 2713 states have internal predecessors, (13146), 0 states have call successors, (0), 0 states 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 21:31:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 13146 transitions. [2021-10-13 21:31:17,121 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 13146 transitions. Word has length 26 [2021-10-13 21:31:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:17,121 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 13146 transitions. [2021-10-13 21:31:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 13146 transitions. [2021-10-13 21:31:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:17,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:17,132 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:17,149 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 21:31:17,346 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 21:31:17,347 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:17,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1314407570, now seen corresponding path program 4 times [2021-10-13 21:31:17,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:17,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184021613] [2021-10-13 21:31:17,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:31:17,349 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:17,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:17,350 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 21:31:17,350 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 21:31:17,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:31:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:31:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:31:17,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:31:18,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:18,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184021613] [2021-10-13 21:31:18,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184021613] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:18,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:18,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:31:18,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216514796] [2021-10-13 21:31:18,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:31:18,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:31:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:31:18,127 INFO L87 Difference]: Start difference. First operand 2714 states and 13146 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:18,450 INFO L93 Difference]: Finished difference Result 6544 states and 28576 transitions. [2021-10-13 21:31:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:31:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:18,516 INFO L225 Difference]: With dead ends: 6544 [2021-10-13 21:31:18,516 INFO L226 Difference]: Without dead ends: 6394 [2021-10-13 21:31:18,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2021-10-13 21:31:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 3056. [2021-10-13 21:31:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 4.88379705400982) internal successors, (14920), 3055 states have internal predecessors, (14920), 0 states have call successors, (0), 0 states 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 21:31:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 14920 transitions. [2021-10-13 21:31:18,687 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 14920 transitions. Word has length 26 [2021-10-13 21:31:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:18,688 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 14920 transitions. [2021-10-13 21:31:18,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 14920 transitions. [2021-10-13 21:31:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:18,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:18,725 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:18,741 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 21:31:18,935 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 21:31:18,935 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 452225682, now seen corresponding path program 5 times [2021-10-13 21:31:18,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:18,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034282018] [2021-10-13 21:31:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:31:18,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:18,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:18,939 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 21:31:18,973 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 21:31:19,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 21:31:19,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:31:19,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:19,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:20,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:20,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034282018] [2021-10-13 21:31:20,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034282018] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:20,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:20,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:31:20,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296656017] [2021-10-13 21:31:20,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:31:20,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:31:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:31:20,530 INFO L87 Difference]: Start difference. First operand 3056 states and 14920 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:21,870 INFO L93 Difference]: Finished difference Result 6432 states and 30913 transitions. [2021-10-13 21:31:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 21:31:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:21,900 INFO L225 Difference]: With dead ends: 6432 [2021-10-13 21:31:21,900 INFO L226 Difference]: Without dead ends: 6122 [2021-10-13 21:31:21,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1323.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:31:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2021-10-13 21:31:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 3874. [2021-10-13 21:31:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3874 states, 3873 states have (on average 5.166537567776917) internal successors, (20010), 3873 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states 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 21:31:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 20010 transitions. [2021-10-13 21:31:22,121 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 20010 transitions. Word has length 26 [2021-10-13 21:31:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:22,122 INFO L470 AbstractCegarLoop]: Abstraction has 3874 states and 20010 transitions. [2021-10-13 21:31:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 20010 transitions. [2021-10-13 21:31:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:22,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:22,138 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:22,153 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 21:31:22,351 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 21:31:22,352 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash -593407252, now seen corresponding path program 6 times [2021-10-13 21:31:22,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:22,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901833254] [2021-10-13 21:31:22,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:31:22,354 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:22,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:22,355 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 21:31:22,356 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 21:31:22,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 21:31:22,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:31:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:23,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:23,695 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:23,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901833254] [2021-10-13 21:31:23,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901833254] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:23,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:23,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-13 21:31:23,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338969149] [2021-10-13 21:31:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:31:23,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:31:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:31:23,698 INFO L87 Difference]: Start difference. First operand 3874 states and 20010 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:26,638 INFO L93 Difference]: Finished difference Result 13216 states and 59110 transitions. [2021-10-13 21:31:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 21:31:26,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:26,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:26,696 INFO L225 Difference]: With dead ends: 13216 [2021-10-13 21:31:26,696 INFO L226 Difference]: Without dead ends: 13216 [2021-10-13 21:31:26,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2299.7ms TimeCoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:31:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13216 states. [2021-10-13 21:31:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13216 to 4768. [2021-10-13 21:31:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4768 states, 4767 states have (on average 5.273127753303965) internal successors, (25137), 4767 states have internal predecessors, (25137), 0 states have call successors, (0), 0 states 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 21:31:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 25137 transitions. [2021-10-13 21:31:27,098 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 25137 transitions. Word has length 26 [2021-10-13 21:31:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:27,099 INFO L470 AbstractCegarLoop]: Abstraction has 4768 states and 25137 transitions. [2021-10-13 21:31:27,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 25137 transitions. [2021-10-13 21:31:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:27,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:27,179 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:27,193 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 21:31:27,390 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 21:31:27,390 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1466942288, now seen corresponding path program 7 times [2021-10-13 21:31:27,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:27,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300910661] [2021-10-13 21:31:27,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:31:27,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:27,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:27,395 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 21:31:27,396 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 21:31:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:31:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:28,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:28,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:28,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300910661] [2021-10-13 21:31:28,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300910661] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:28,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:28,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 21:31:28,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541318020] [2021-10-13 21:31:28,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:31:28,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:31:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:28,515 INFO L87 Difference]: Start difference. First operand 4768 states and 25137 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:29,052 INFO L93 Difference]: Finished difference Result 6098 states and 29978 transitions. [2021-10-13 21:31:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 21:31:29,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:29,072 INFO L225 Difference]: With dead ends: 6098 [2021-10-13 21:31:29,072 INFO L226 Difference]: Without dead ends: 5884 [2021-10-13 21:31:29,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:31:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2021-10-13 21:31:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 4674. [2021-10-13 21:31:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 5.21613524502461) internal successors, (24375), 4673 states have internal predecessors, (24375), 0 states have call successors, (0), 0 states 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 21:31:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 24375 transitions. [2021-10-13 21:31:29,359 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 24375 transitions. Word has length 26 [2021-10-13 21:31:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:29,359 INFO L470 AbstractCegarLoop]: Abstraction has 4674 states and 24375 transitions. [2021-10-13 21:31:29,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 24375 transitions. [2021-10-13 21:31:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:29,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:29,381 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:29,397 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 21:31:29,594 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 21:31:29,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash -168226826, now seen corresponding path program 1 times [2021-10-13 21:31:29,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:29,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220380336] [2021-10-13 21:31:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:29,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:29,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:29,599 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 21:31:29,603 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 21:31:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:31:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:30,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:30,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:30,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220380336] [2021-10-13 21:31:30,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220380336] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:30,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:30,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 21:31:30,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541569325] [2021-10-13 21:31:30,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:31:30,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:31:30,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:30,597 INFO L87 Difference]: Start difference. First operand 4674 states and 24375 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:32,148 INFO L93 Difference]: Finished difference Result 12020 states and 55130 transitions. [2021-10-13 21:31:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 21:31:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:32,202 INFO L225 Difference]: With dead ends: 12020 [2021-10-13 21:31:32,202 INFO L226 Difference]: Without dead ends: 11838 [2021-10-13 21:31:32,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1043.8ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:31:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11838 states. [2021-10-13 21:31:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11838 to 5012. [2021-10-13 21:31:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 5011 states have (on average 5.27958491319098) internal successors, (26456), 5011 states have internal predecessors, (26456), 0 states have call successors, (0), 0 states 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 21:31:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 26456 transitions. [2021-10-13 21:31:32,499 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 26456 transitions. Word has length 26 [2021-10-13 21:31:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:32,499 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 26456 transitions. [2021-10-13 21:31:32,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 21:31:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 26456 transitions. [2021-10-13 21:31:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:32,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:32,522 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:32,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:32,736 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 21:31:32,737 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1189925066, now seen corresponding path program 8 times [2021-10-13 21:31:32,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:32,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148173906] [2021-10-13 21:31:32,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:32,739 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:32,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:32,740 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 21:31:32,741 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 21:31:33,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:33,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:33,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:31:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:33,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:34,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:34,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148173906] [2021-10-13 21:31:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148173906] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:34,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:34,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-13 21:31:34,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400367730] [2021-10-13 21:31:34,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:31:34,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:31:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:31:34,381 INFO L87 Difference]: Start difference. First operand 5012 states and 26456 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:36,724 INFO L93 Difference]: Finished difference Result 16158 states and 77079 transitions. [2021-10-13 21:31:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 21:31:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:36,788 INFO L225 Difference]: With dead ends: 16158 [2021-10-13 21:31:36,789 INFO L226 Difference]: Without dead ends: 16014 [2021-10-13 21:31:36,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2148.0ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-10-13 21:31:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16014 states. [2021-10-13 21:31:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16014 to 7730. [2021-10-13 21:31:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 5.491396040884979) internal successors, (42443), 7729 states have internal predecessors, (42443), 0 states have call successors, (0), 0 states 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 21:31:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 42443 transitions. [2021-10-13 21:31:37,247 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 42443 transitions. Word has length 26 [2021-10-13 21:31:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:37,247 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 42443 transitions. [2021-10-13 21:31:37,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 42443 transitions. [2021-10-13 21:31:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:37,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:37,280 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:37,293 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 21:31:37,493 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 21:31:37,493 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash -81783782, now seen corresponding path program 9 times [2021-10-13 21:31:37,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:37,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501615750] [2021-10-13 21:31:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:37,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:37,498 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 21:31:37,536 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 21:31:37,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 21:31:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:37,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:31:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:38,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:38,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:38,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501615750] [2021-10-13 21:31:38,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501615750] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:38,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:38,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:31:38,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521650754] [2021-10-13 21:31:38,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:31:38,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:38,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:31:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:31:38,549 INFO L87 Difference]: Start difference. First operand 7730 states and 42443 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:39,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:39,305 INFO L93 Difference]: Finished difference Result 16018 states and 81091 transitions. [2021-10-13 21:31:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:31:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:39,367 INFO L225 Difference]: With dead ends: 16018 [2021-10-13 21:31:39,368 INFO L226 Difference]: Without dead ends: 16018 [2021-10-13 21:31:39,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:31:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16018 states. [2021-10-13 21:31:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16018 to 9254. [2021-10-13 21:31:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9254 states, 9253 states have (on average 5.588890089700637) internal successors, (51714), 9253 states have internal predecessors, (51714), 0 states have call successors, (0), 0 states 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 21:31:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9254 states to 9254 states and 51714 transitions. [2021-10-13 21:31:39,988 INFO L78 Accepts]: Start accepts. Automaton has 9254 states and 51714 transitions. Word has length 26 [2021-10-13 21:31:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:39,989 INFO L470 AbstractCegarLoop]: Abstraction has 9254 states and 51714 transitions. [2021-10-13 21:31:39,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9254 states and 51714 transitions. [2021-10-13 21:31:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:40,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:40,024 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:40,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-13 21:31:40,226 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 21:31:40,226 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1546858518, now seen corresponding path program 10 times [2021-10-13 21:31:40,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:40,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597819494] [2021-10-13 21:31:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:31:40,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:40,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:40,249 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 21:31:40,265 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 21:31:40,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:31:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:31:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:41,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:41,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:41,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597819494] [2021-10-13 21:31:41,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597819494] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:41,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:41,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 21:31:41,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581966237] [2021-10-13 21:31:41,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:31:41,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:31:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:41,565 INFO L87 Difference]: Start difference. First operand 9254 states and 51714 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:42,257 INFO L93 Difference]: Finished difference Result 10618 states and 57347 transitions. [2021-10-13 21:31:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 21:31:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:42,306 INFO L225 Difference]: With dead ends: 10618 [2021-10-13 21:31:42,306 INFO L226 Difference]: Without dead ends: 10206 [2021-10-13 21:31:42,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 396.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:31:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10206 states. [2021-10-13 21:31:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10206 to 8858. [2021-10-13 21:31:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 8857 states have (on average 5.5553799254826695) internal successors, (49204), 8857 states have internal predecessors, (49204), 0 states have call successors, (0), 0 states 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 21:31:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 49204 transitions. [2021-10-13 21:31:42,850 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 49204 transitions. Word has length 26 [2021-10-13 21:31:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:42,851 INFO L470 AbstractCegarLoop]: Abstraction has 8858 states and 49204 transitions. [2021-10-13 21:31:42,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 49204 transitions. [2021-10-13 21:31:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:42,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:42,878 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:42,891 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 21:31:43,087 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 21:31:43,088 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1737127701, now seen corresponding path program 3 times [2021-10-13 21:31:43,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:43,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141247014] [2021-10-13 21:31:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:43,090 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:43,091 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 21:31:43,092 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 21:31:43,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:31:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:43,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:44,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:44,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141247014] [2021-10-13 21:31:44,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141247014] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:44,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:44,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 21:31:44,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086416451] [2021-10-13 21:31:44,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:31:44,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:31:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:44,852 INFO L87 Difference]: Start difference. First operand 8858 states and 49204 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:46,213 INFO L93 Difference]: Finished difference Result 10580 states and 57429 transitions. [2021-10-13 21:31:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:31:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:46,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:46,263 INFO L225 Difference]: With dead ends: 10580 [2021-10-13 21:31:46,263 INFO L226 Difference]: Without dead ends: 10580 [2021-10-13 21:31:46,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1162.9ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-10-13 21:31:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10580 states. [2021-10-13 21:31:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10580 to 9780. [2021-10-13 21:31:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9780 states, 9779 states have (on average 5.515185601799775) internal successors, (53933), 9779 states have internal predecessors, (53933), 0 states have call successors, (0), 0 states 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 21:31:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9780 states to 9780 states and 53933 transitions. [2021-10-13 21:31:46,635 INFO L78 Accepts]: Start accepts. Automaton has 9780 states and 53933 transitions. Word has length 26 [2021-10-13 21:31:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:46,635 INFO L470 AbstractCegarLoop]: Abstraction has 9780 states and 53933 transitions. [2021-10-13 21:31:46,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 9780 states and 53933 transitions. [2021-10-13 21:31:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:46,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:46,759 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:46,773 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 21:31:46,971 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 21:31:46,972 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1152370084, now seen corresponding path program 11 times [2021-10-13 21:31:46,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:46,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463513255] [2021-10-13 21:31:46,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:31:46,974 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:46,975 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 21:31:46,977 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 21:31:47,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 21:31:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:31:47,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:31:47,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:31:48,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:48,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463513255] [2021-10-13 21:31:48,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463513255] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:48,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:48,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:31:48,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421992210] [2021-10-13 21:31:48,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:31:48,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:31:48,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:31:48,525 INFO L87 Difference]: Start difference. First operand 9780 states and 53933 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:49,150 INFO L93 Difference]: Finished difference Result 12826 states and 68370 transitions. [2021-10-13 21:31:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:31:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:49,217 INFO L225 Difference]: With dead ends: 12826 [2021-10-13 21:31:49,217 INFO L226 Difference]: Without dead ends: 12310 [2021-10-13 21:31:49,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:31:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12310 states. [2021-10-13 21:31:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12310 to 11066. [2021-10-13 21:31:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11066 states, 11065 states have (on average 5.4877541798463625) internal successors, (60722), 11065 states have internal predecessors, (60722), 0 states have call successors, (0), 0 states 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 21:31:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11066 states to 11066 states and 60722 transitions. [2021-10-13 21:31:49,681 INFO L78 Accepts]: Start accepts. Automaton has 11066 states and 60722 transitions. Word has length 26 [2021-10-13 21:31:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:49,681 INFO L470 AbstractCegarLoop]: Abstraction has 11066 states and 60722 transitions. [2021-10-13 21:31:49,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11066 states and 60722 transitions. [2021-10-13 21:31:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 21:31:49,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:49,714 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:49,726 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 21:31:49,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:49,915 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash 203870602, now seen corresponding path program 12 times [2021-10-13 21:31:49,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:49,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987813790] [2021-10-13 21:31:49,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:31:49,916 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:49,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:49,919 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:49,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 21:31:50,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 21:31:50,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:50,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:31:50,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:50,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:51,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:51,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987813790] [2021-10-13 21:31:51,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987813790] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:51,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:51,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 21:31:51,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388691803] [2021-10-13 21:31:51,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:31:51,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:51,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:31:51,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:31:51,601 INFO L87 Difference]: Start difference. First operand 11066 states and 60722 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:52,718 INFO L93 Difference]: Finished difference Result 12056 states and 65051 transitions. [2021-10-13 21:31:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:31:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 21:31:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:52,763 INFO L225 Difference]: With dead ends: 12056 [2021-10-13 21:31:52,763 INFO L226 Difference]: Without dead ends: 12024 [2021-10-13 21:31:52,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 738.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:31:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-10-13 21:31:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 11242. [2021-10-13 21:31:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11242 states, 11241 states have (on average 5.4758473445423) internal successors, (61554), 11241 states have internal predecessors, (61554), 0 states have call successors, (0), 0 states 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 21:31:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11242 states to 11242 states and 61554 transitions. [2021-10-13 21:31:53,346 INFO L78 Accepts]: Start accepts. Automaton has 11242 states and 61554 transitions. Word has length 26 [2021-10-13 21:31:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:53,346 INFO L470 AbstractCegarLoop]: Abstraction has 11242 states and 61554 transitions. [2021-10-13 21:31:53,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 11242 states and 61554 transitions. [2021-10-13 21:31:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 21:31:53,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:53,381 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:53,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:53,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:53,582 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:53,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1627136439, now seen corresponding path program 13 times [2021-10-13 21:31:53,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:53,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465903484] [2021-10-13 21:31:53,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:31:53,585 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:53,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:53,586 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:53,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 21:31:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:31:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:54,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:54,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:54,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465903484] [2021-10-13 21:31:54,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465903484] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:54,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:54,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-13 21:31:54,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790156656] [2021-10-13 21:31:54,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:31:54,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:31:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:31:54,258 INFO L87 Difference]: Start difference. First operand 11242 states and 61554 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:54,622 INFO L93 Difference]: Finished difference Result 20275 states and 107567 transitions. [2021-10-13 21:31:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:31:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 21:31:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:54,726 INFO L225 Difference]: With dead ends: 20275 [2021-10-13 21:31:54,726 INFO L226 Difference]: Without dead ends: 19918 [2021-10-13 21:31:54,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:31:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19918 states. [2021-10-13 21:31:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19918 to 13630. [2021-10-13 21:31:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13630 states, 13629 states have (on average 5.480005869836378) internal successors, (74687), 13629 states have internal predecessors, (74687), 0 states have call successors, (0), 0 states 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 21:31:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13630 states to 13630 states and 74687 transitions. [2021-10-13 21:31:55,457 INFO L78 Accepts]: Start accepts. Automaton has 13630 states and 74687 transitions. Word has length 27 [2021-10-13 21:31:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:55,457 INFO L470 AbstractCegarLoop]: Abstraction has 13630 states and 74687 transitions. [2021-10-13 21:31:55,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 13630 states and 74687 transitions. [2021-10-13 21:31:55,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 21:31:55,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:55,514 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:55,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:55,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:55,722 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:31:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1600825351, now seen corresponding path program 14 times [2021-10-13 21:31:55,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:55,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469626291] [2021-10-13 21:31:55,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:55,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:55,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:55,729 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:55,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 21:31:56,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:56,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:31:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:56,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:57,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:57,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469626291] [2021-10-13 21:31:57,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469626291] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:57,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:57,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:31:57,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099794571] [2021-10-13 21:31:57,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:31:57,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:31:57,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:31:57,274 INFO L87 Difference]: Start difference. First operand 13630 states and 74687 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:59,458 INFO L93 Difference]: Finished difference Result 20874 states and 104400 transitions. [2021-10-13 21:31:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 21:31:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 21:31:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:59,551 INFO L225 Difference]: With dead ends: 20874 [2021-10-13 21:31:59,551 INFO L226 Difference]: Without dead ends: 20522 [2021-10-13 21:31:59,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1525.8ms TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:31:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20522 states. [2021-10-13 21:32:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20522 to 14100. [2021-10-13 21:32:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14100 states, 14099 states have (on average 5.496063550606426) internal successors, (77489), 14099 states have internal predecessors, (77489), 0 states have call successors, (0), 0 states 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 21:32:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14100 states to 14100 states and 77489 transitions. [2021-10-13 21:32:00,347 INFO L78 Accepts]: Start accepts. Automaton has 14100 states and 77489 transitions. Word has length 27 [2021-10-13 21:32:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:00,348 INFO L470 AbstractCegarLoop]: Abstraction has 14100 states and 77489 transitions. [2021-10-13 21:32:00,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 14100 states and 77489 transitions. [2021-10-13 21:32:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:00,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:00,412 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:00,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-10-13 21:32:00,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:00,627 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1488732476, now seen corresponding path program 15 times [2021-10-13 21:32:00,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:00,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921711778] [2021-10-13 21:32:00,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:32:00,629 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:00,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:00,630 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:00,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 21:32:01,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:32:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:32:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:32:01,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:02,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:02,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921711778] [2021-10-13 21:32:02,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921711778] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:02,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:02,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-10-13 21:32:02,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467465472] [2021-10-13 21:32:02,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:32:02,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:02,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:32:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:32:02,124 INFO L87 Difference]: Start difference. First operand 14100 states and 77489 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 21:32:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:03,716 INFO L93 Difference]: Finished difference Result 22138 states and 109119 transitions. [2021-10-13 21:32:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 21:32:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:03,807 INFO L225 Difference]: With dead ends: 22138 [2021-10-13 21:32:03,807 INFO L226 Difference]: Without dead ends: 22034 [2021-10-13 21:32:03,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1046.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:32:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22034 states. [2021-10-13 21:32:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22034 to 15580. [2021-10-13 21:32:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15580 states, 15579 states have (on average 5.392451376853456) internal successors, (84009), 15579 states have internal predecessors, (84009), 0 states have call successors, (0), 0 states 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 21:32:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15580 states to 15580 states and 84009 transitions. [2021-10-13 21:32:04,556 INFO L78 Accepts]: Start accepts. Automaton has 15580 states and 84009 transitions. Word has length 28 [2021-10-13 21:32:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:04,556 INFO L470 AbstractCegarLoop]: Abstraction has 15580 states and 84009 transitions. [2021-10-13 21:32:04,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 21:32:04,557 INFO L276 IsEmpty]: Start isEmpty. Operand 15580 states and 84009 transitions. [2021-10-13 21:32:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:04,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:04,601 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:04,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:04,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:04,802 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1144976476, now seen corresponding path program 16 times [2021-10-13 21:32:04,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:04,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068073717] [2021-10-13 21:32:04,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:32:04,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:04,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:04,821 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:04,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-13 21:32:05,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:32:05,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:32:05,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:32:06,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:06,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:06,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068073717] [2021-10-13 21:32:06,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068073717] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:06,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:06,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-10-13 21:32:06,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702331864] [2021-10-13 21:32:06,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:32:06,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:06,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:32:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:32:06,563 INFO L87 Difference]: Start difference. First operand 15580 states and 84009 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:09,394 INFO L93 Difference]: Finished difference Result 26454 states and 128594 transitions. [2021-10-13 21:32:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 21:32:09,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:09,496 INFO L225 Difference]: With dead ends: 26454 [2021-10-13 21:32:09,496 INFO L226 Difference]: Without dead ends: 26350 [2021-10-13 21:32:09,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2065.2ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:32:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26350 states. [2021-10-13 21:32:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26350 to 16634. [2021-10-13 21:32:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16634 states, 16633 states have (on average 5.422954367823002) internal successors, (90200), 16633 states have internal predecessors, (90200), 0 states have call successors, (0), 0 states 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 21:32:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16634 states to 16634 states and 90200 transitions. [2021-10-13 21:32:10,372 INFO L78 Accepts]: Start accepts. Automaton has 16634 states and 90200 transitions. Word has length 28 [2021-10-13 21:32:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:10,373 INFO L470 AbstractCegarLoop]: Abstraction has 16634 states and 90200 transitions. [2021-10-13 21:32:10,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 16634 states and 90200 transitions. [2021-10-13 21:32:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:10,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:10,422 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:10,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:10,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:10,623 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1669703174, now seen corresponding path program 17 times [2021-10-13 21:32:10,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:10,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459173376] [2021-10-13 21:32:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:32:10,626 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:10,628 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:10,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-13 21:32:11,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 21:32:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:32:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:32:11,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:32:11,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:11,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459173376] [2021-10-13 21:32:11,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459173376] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:11,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:11,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:32:11,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545162585] [2021-10-13 21:32:11,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:32:11,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:32:11,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:32:11,915 INFO L87 Difference]: Start difference. First operand 16634 states and 90200 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:12,319 INFO L93 Difference]: Finished difference Result 20454 states and 107204 transitions. [2021-10-13 21:32:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:32:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:12,403 INFO L225 Difference]: With dead ends: 20454 [2021-10-13 21:32:12,403 INFO L226 Difference]: Without dead ends: 20172 [2021-10-13 21:32:12,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:32:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20172 states. [2021-10-13 21:32:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20172 to 14214. [2021-10-13 21:32:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14214 states, 14213 states have (on average 5.353127418560473) internal successors, (76084), 14213 states have internal predecessors, (76084), 0 states have call successors, (0), 0 states 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 21:32:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14214 states to 14214 states and 76084 transitions. [2021-10-13 21:32:13,299 INFO L78 Accepts]: Start accepts. Automaton has 14214 states and 76084 transitions. Word has length 28 [2021-10-13 21:32:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:13,300 INFO L470 AbstractCegarLoop]: Abstraction has 14214 states and 76084 transitions. [2021-10-13 21:32:13,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 14214 states and 76084 transitions. [2021-10-13 21:32:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:13,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:13,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:13,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:13,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:13,553 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1309729608, now seen corresponding path program 18 times [2021-10-13 21:32:13,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:13,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218900929] [2021-10-13 21:32:13,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:32:13,554 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:13,556 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:13,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 21:32:14,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 21:32:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:32:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:32:14,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:15,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:15,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218900929] [2021-10-13 21:32:15,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218900929] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:15,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:15,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-10-13 21:32:15,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628567036] [2021-10-13 21:32:15,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:32:15,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:32:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:32:15,259 INFO L87 Difference]: Start difference. First operand 14214 states and 76084 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 21:32:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:19,441 INFO L93 Difference]: Finished difference Result 32312 states and 150838 transitions. [2021-10-13 21:32:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 21:32:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:19,819 INFO L225 Difference]: With dead ends: 32312 [2021-10-13 21:32:19,819 INFO L226 Difference]: Without dead ends: 32042 [2021-10-13 21:32:19,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3511.0ms TimeCoverageRelationStatistics Valid=431, Invalid=1209, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 21:32:19,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32042 states. [2021-10-13 21:32:20,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32042 to 16242. [2021-10-13 21:32:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16242 states, 16241 states have (on average 5.2644541592266485) internal successors, (85500), 16241 states have internal predecessors, (85500), 0 states have call successors, (0), 0 states 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 21:32:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16242 states to 16242 states and 85500 transitions. [2021-10-13 21:32:20,757 INFO L78 Accepts]: Start accepts. Automaton has 16242 states and 85500 transitions. Word has length 28 [2021-10-13 21:32:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:20,758 INFO L470 AbstractCegarLoop]: Abstraction has 16242 states and 85500 transitions. [2021-10-13 21:32:20,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 21:32:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 16242 states and 85500 transitions. [2021-10-13 21:32:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:20,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:20,816 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:20,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:21,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:21,021 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1065406974, now seen corresponding path program 19 times [2021-10-13 21:32:21,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:21,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329884420] [2021-10-13 21:32:21,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:32:21,024 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:21,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:21,025 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:21,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-13 21:32:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:32:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:32:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:32:22,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:22,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:22,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329884420] [2021-10-13 21:32:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329884420] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:22,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:22,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-10-13 21:32:22,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352849092] [2021-10-13 21:32:22,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:32:22,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:32:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:32:22,517 INFO L87 Difference]: Start difference. First operand 16242 states and 85500 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:25,527 INFO L93 Difference]: Finished difference Result 36716 states and 173634 transitions. [2021-10-13 21:32:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:32:25,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:25,758 INFO L225 Difference]: With dead ends: 36716 [2021-10-13 21:32:25,758 INFO L226 Difference]: Without dead ends: 36514 [2021-10-13 21:32:25,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2085.5ms TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:32:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36514 states. [2021-10-13 21:32:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36514 to 17314. [2021-10-13 21:32:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17314 states, 17313 states have (on average 5.350141512158493) internal successors, (92627), 17313 states have internal predecessors, (92627), 0 states have call successors, (0), 0 states 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 21:32:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17314 states to 17314 states and 92627 transitions. [2021-10-13 21:32:26,882 INFO L78 Accepts]: Start accepts. Automaton has 17314 states and 92627 transitions. Word has length 28 [2021-10-13 21:32:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:26,882 INFO L470 AbstractCegarLoop]: Abstraction has 17314 states and 92627 transitions. [2021-10-13 21:32:26,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 17314 states and 92627 transitions. [2021-10-13 21:32:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:26,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:26,939 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:26,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:27,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:27,140 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:27,141 INFO L82 PathProgramCache]: Analyzing trace with hash -828041732, now seen corresponding path program 20 times [2021-10-13 21:32:27,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:27,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821442808] [2021-10-13 21:32:27,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:32:27,142 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:27,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:27,143 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:27,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-13 21:32:28,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:32:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:32:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:28,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:29,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:29,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821442808] [2021-10-13 21:32:29,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821442808] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:29,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:29,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 21:32:29,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285953274] [2021-10-13 21:32:29,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 21:32:29,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 21:32:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:32:29,147 INFO L87 Difference]: Start difference. First operand 17314 states and 92627 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:32,465 INFO L93 Difference]: Finished difference Result 37550 states and 178939 transitions. [2021-10-13 21:32:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 21:32:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:32,642 INFO L225 Difference]: With dead ends: 37550 [2021-10-13 21:32:32,642 INFO L226 Difference]: Without dead ends: 37448 [2021-10-13 21:32:32,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 2258.9ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:32:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37448 states. [2021-10-13 21:32:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37448 to 17948. [2021-10-13 21:32:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17948 states, 17947 states have (on average 5.402351367916643) internal successors, (96956), 17947 states have internal predecessors, (96956), 0 states have call successors, (0), 0 states 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 21:32:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17948 states to 17948 states and 96956 transitions. [2021-10-13 21:32:33,628 INFO L78 Accepts]: Start accepts. Automaton has 17948 states and 96956 transitions. Word has length 28 [2021-10-13 21:32:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:33,628 INFO L470 AbstractCegarLoop]: Abstraction has 17948 states and 96956 transitions. [2021-10-13 21:32:33,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17948 states and 96956 transitions. [2021-10-13 21:32:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:33,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:33,677 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:33,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:33,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:33,878 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:33,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2117508078, now seen corresponding path program 21 times [2021-10-13 21:32:33,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:33,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038828804] [2021-10-13 21:32:33,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:32:33,880 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:33,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:33,881 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:33,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 21:32:34,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 21:32:34,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:34,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:32:34,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:35,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:35,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:35,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038828804] [2021-10-13 21:32:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038828804] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:35,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:35,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-13 21:32:35,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736955250] [2021-10-13 21:32:35,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:32:35,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:32:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:32:35,714 INFO L87 Difference]: Start difference. First operand 17948 states and 96956 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:38,503 INFO L93 Difference]: Finished difference Result 40226 states and 199294 transitions. [2021-10-13 21:32:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:32:38,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:38,667 INFO L225 Difference]: With dead ends: 40226 [2021-10-13 21:32:38,667 INFO L226 Difference]: Without dead ends: 39700 [2021-10-13 21:32:38,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2023.5ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:32:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39700 states. [2021-10-13 21:32:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39700 to 23100. [2021-10-13 21:32:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23100 states, 23099 states have (on average 5.499372267197714) internal successors, (127030), 23099 states have internal predecessors, (127030), 0 states have call successors, (0), 0 states 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 21:32:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 127030 transitions. [2021-10-13 21:32:40,190 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 127030 transitions. Word has length 28 [2021-10-13 21:32:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:40,191 INFO L470 AbstractCegarLoop]: Abstraction has 23100 states and 127030 transitions. [2021-10-13 21:32:40,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 127030 transitions. [2021-10-13 21:32:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:40,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:40,255 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:40,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:40,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:40,456 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash 284010512, now seen corresponding path program 22 times [2021-10-13 21:32:40,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:40,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004924444] [2021-10-13 21:32:40,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:32:40,459 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:40,460 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:40,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-13 21:32:41,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:32:41,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:32:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:41,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:42,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:42,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004924444] [2021-10-13 21:32:42,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004924444] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:42,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:42,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 21:32:42,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140726011] [2021-10-13 21:32:42,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 21:32:42,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 21:32:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:32:42,255 INFO L87 Difference]: Start difference. First operand 23100 states and 127030 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:45,913 INFO L93 Difference]: Finished difference Result 45118 states and 226725 transitions. [2021-10-13 21:32:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 21:32:45,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:46,166 INFO L225 Difference]: With dead ends: 45118 [2021-10-13 21:32:46,166 INFO L226 Difference]: Without dead ends: 45074 [2021-10-13 21:32:46,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2423.8ms TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 21:32:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45074 states. [2021-10-13 21:32:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45074 to 23694. [2021-10-13 21:32:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23694 states, 23693 states have (on average 5.511965559447939) internal successors, (130595), 23693 states have internal predecessors, (130595), 0 states have call successors, (0), 0 states 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 21:32:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23694 states to 23694 states and 130595 transitions. [2021-10-13 21:32:47,763 INFO L78 Accepts]: Start accepts. Automaton has 23694 states and 130595 transitions. Word has length 28 [2021-10-13 21:32:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 23694 states and 130595 transitions. [2021-10-13 21:32:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:32:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 23694 states and 130595 transitions. [2021-10-13 21:32:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:47,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:47,894 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:47,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:48,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:48,108 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:48,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2008683902, now seen corresponding path program 23 times [2021-10-13 21:32:48,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:48,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047489200] [2021-10-13 21:32:48,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:32:48,111 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:48,112 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:48,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-13 21:32:48,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 21:32:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:32:48,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:32:49,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:32:49,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:49,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047489200] [2021-10-13 21:32:49,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047489200] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:49,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:49,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:32:49,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415736258] [2021-10-13 21:32:49,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:32:49,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:32:49,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:32:49,511 INFO L87 Difference]: Start difference. First operand 23694 states and 130595 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:50,324 INFO L93 Difference]: Finished difference Result 30082 states and 155908 transitions. [2021-10-13 21:32:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:32:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:50,453 INFO L225 Difference]: With dead ends: 30082 [2021-10-13 21:32:50,453 INFO L226 Difference]: Without dead ends: 29950 [2021-10-13 21:32:50,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:32:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29950 states. [2021-10-13 21:32:51,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29950 to 18742. [2021-10-13 21:32:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18742 states, 18741 states have (on average 5.372498799423723) internal successors, (100686), 18741 states have internal predecessors, (100686), 0 states have call successors, (0), 0 states 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 21:32:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18742 states to 18742 states and 100686 transitions. [2021-10-13 21:32:51,544 INFO L78 Accepts]: Start accepts. Automaton has 18742 states and 100686 transitions. Word has length 28 [2021-10-13 21:32:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:51,544 INFO L470 AbstractCegarLoop]: Abstraction has 18742 states and 100686 transitions. [2021-10-13 21:32:51,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 18742 states and 100686 transitions. [2021-10-13 21:32:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:51,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:51,596 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:51,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:51,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:51,797 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash -974093808, now seen corresponding path program 24 times [2021-10-13 21:32:51,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:51,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254715319] [2021-10-13 21:32:51,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:32:51,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:51,801 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:51,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-13 21:32:52,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 21:32:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:32:52,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:53,066 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 21:32:53,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:32:53,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:53,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254715319] [2021-10-13 21:32:53,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254715319] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:53,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:53,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 21:32:53,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881138633] [2021-10-13 21:32:53,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 21:32:53,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 21:32:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:32:53,738 INFO L87 Difference]: Start difference. First operand 18742 states and 100686 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:32:57,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:57,403 INFO L93 Difference]: Finished difference Result 35678 states and 173231 transitions. [2021-10-13 21:32:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 21:32:57,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:32:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:57,562 INFO L225 Difference]: With dead ends: 35678 [2021-10-13 21:32:57,562 INFO L226 Difference]: Without dead ends: 35616 [2021-10-13 21:32:57,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2555.9ms TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:32:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35616 states. [2021-10-13 21:32:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35616 to 19986. [2021-10-13 21:32:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19986 states, 19985 states have (on average 5.405253940455341) internal successors, (108024), 19985 states have internal predecessors, (108024), 0 states have call successors, (0), 0 states 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 21:32:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19986 states to 19986 states and 108024 transitions. [2021-10-13 21:32:58,731 INFO L78 Accepts]: Start accepts. Automaton has 19986 states and 108024 transitions. Word has length 28 [2021-10-13 21:32:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:58,731 INFO L470 AbstractCegarLoop]: Abstraction has 19986 states and 108024 transitions. [2021-10-13 21:32:58,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:32:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 19986 states and 108024 transitions. [2021-10-13 21:32:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:32:58,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:58,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:58,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:58,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:58,987 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:32:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1250274748, now seen corresponding path program 25 times [2021-10-13 21:32:58,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:58,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065979521] [2021-10-13 21:32:58,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:32:58,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:58,989 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:58,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-13 21:32:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:32:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:32:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:00,473 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 21:33:00,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:33:01,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:01,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065979521] [2021-10-13 21:33:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065979521] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:01,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:01,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-13 21:33:01,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223877257] [2021-10-13 21:33:01,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 21:33:01,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 21:33:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:33:01,354 INFO L87 Difference]: Start difference. First operand 19986 states and 108024 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:33:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:07,301 INFO L93 Difference]: Finished difference Result 44924 states and 217618 transitions. [2021-10-13 21:33:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-13 21:33:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:33:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:07,501 INFO L225 Difference]: With dead ends: 44924 [2021-10-13 21:33:07,501 INFO L226 Difference]: Without dead ends: 44872 [2021-10-13 21:33:07,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4582.4ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 21:33:07,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44872 states. [2021-10-13 21:33:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44872 to 20684. [2021-10-13 21:33:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20684 states, 20683 states have (on average 5.433931247884736) internal successors, (112390), 20683 states have internal predecessors, (112390), 0 states have call successors, (0), 0 states 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 21:33:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20684 states to 20684 states and 112390 transitions. [2021-10-13 21:33:09,027 INFO L78 Accepts]: Start accepts. Automaton has 20684 states and 112390 transitions. Word has length 28 [2021-10-13 21:33:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:09,027 INFO L470 AbstractCegarLoop]: Abstraction has 20684 states and 112390 transitions. [2021-10-13 21:33:09,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:33:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 20684 states and 112390 transitions. [2021-10-13 21:33:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:33:09,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:09,097 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:09,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:09,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:09,300 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:33:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash -714156418, now seen corresponding path program 26 times [2021-10-13 21:33:09,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:09,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745981107] [2021-10-13 21:33:09,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:33:09,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:09,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:09,304 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:09,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-13 21:33:10,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:33:10,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:10,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:33:10,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:33:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:33:10,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:10,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745981107] [2021-10-13 21:33:10,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745981107] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:10,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:10,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:33:10,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483320969] [2021-10-13 21:33:10,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:33:10,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:33:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:33:10,868 INFO L87 Difference]: Start difference. First operand 20684 states and 112390 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:33:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:12,204 INFO L93 Difference]: Finished difference Result 44690 states and 225027 transitions. [2021-10-13 21:33:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 21:33:12,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:33:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:12,396 INFO L225 Difference]: With dead ends: 44690 [2021-10-13 21:33:12,396 INFO L226 Difference]: Without dead ends: 44370 [2021-10-13 21:33:12,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 712.5ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-10-13 21:33:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44370 states. [2021-10-13 21:33:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44370 to 24568. [2021-10-13 21:33:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24568 states, 24567 states have (on average 5.4448243578784545) internal successors, (133763), 24567 states have internal predecessors, (133763), 0 states have call successors, (0), 0 states 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 21:33:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24568 states to 24568 states and 133763 transitions. [2021-10-13 21:33:13,752 INFO L78 Accepts]: Start accepts. Automaton has 24568 states and 133763 transitions. Word has length 28 [2021-10-13 21:33:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:13,752 INFO L470 AbstractCegarLoop]: Abstraction has 24568 states and 133763 transitions. [2021-10-13 21:33:13,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:33:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 24568 states and 133763 transitions. [2021-10-13 21:33:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:33:14,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:14,075 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:14,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:14,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:14,288 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:33:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1651395982, now seen corresponding path program 27 times [2021-10-13 21:33:14,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:14,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018280755] [2021-10-13 21:33:14,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:33:14,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:14,290 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:14,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-13 21:33:15,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:33:15,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:33:15,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:33:15,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:33:16,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:16,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018280755] [2021-10-13 21:33:16,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018280755] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:16,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:16,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-13 21:33:16,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478655381] [2021-10-13 21:33:16,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:33:16,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:33:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:33:16,295 INFO L87 Difference]: Start difference. First operand 24568 states and 133763 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:33:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:19,386 INFO L93 Difference]: Finished difference Result 57984 states and 285998 transitions. [2021-10-13 21:33:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 21:33:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:33:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:19,790 INFO L225 Difference]: With dead ends: 57984 [2021-10-13 21:33:19,790 INFO L226 Difference]: Without dead ends: 57908 [2021-10-13 21:33:19,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2138.3ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-10-13 21:33:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57908 states. [2021-10-13 21:33:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57908 to 26062. [2021-10-13 21:33:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26062 states, 26061 states have (on average 5.468017343923871) internal successors, (142502), 26061 states have internal predecessors, (142502), 0 states have call successors, (0), 0 states 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 21:33:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26062 states to 26062 states and 142502 transitions. [2021-10-13 21:33:22,082 INFO L78 Accepts]: Start accepts. Automaton has 26062 states and 142502 transitions. Word has length 28 [2021-10-13 21:33:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:22,082 INFO L470 AbstractCegarLoop]: Abstraction has 26062 states and 142502 transitions. [2021-10-13 21:33:22,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:33:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26062 states and 142502 transitions. [2021-10-13 21:33:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:33:22,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:22,157 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:22,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:22,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:22,358 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:33:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash -990700036, now seen corresponding path program 28 times [2021-10-13 21:33:22,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:22,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350320916] [2021-10-13 21:33:22,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:33:22,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:22,362 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:22,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-13 21:33:23,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:33:23,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:23,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:33:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:33:23,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:33:24,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:24,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350320916] [2021-10-13 21:33:24,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350320916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:24,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:24,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-10-13 21:33:24,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134197410] [2021-10-13 21:33:24,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:33:24,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:33:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:33:24,805 INFO L87 Difference]: Start difference. First operand 26062 states and 142502 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:33:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:29,173 INFO L93 Difference]: Finished difference Result 59060 states and 283599 transitions. [2021-10-13 21:33:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 21:33:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:33:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:29,489 INFO L225 Difference]: With dead ends: 59060 [2021-10-13 21:33:29,489 INFO L226 Difference]: Without dead ends: 58728 [2021-10-13 21:33:29,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2715.0ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 21:33:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58728 states. [2021-10-13 21:33:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58728 to 26682. [2021-10-13 21:33:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26682 states, 26681 states have (on average 5.453019002286271) internal successors, (145492), 26681 states have internal predecessors, (145492), 0 states have call successors, (0), 0 states 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 21:33:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26682 states to 26682 states and 145492 transitions. [2021-10-13 21:33:31,504 INFO L78 Accepts]: Start accepts. Automaton has 26682 states and 145492 transitions. Word has length 28 [2021-10-13 21:33:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:31,504 INFO L470 AbstractCegarLoop]: Abstraction has 26682 states and 145492 transitions. [2021-10-13 21:33:31,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:33:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26682 states and 145492 transitions. [2021-10-13 21:33:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:33:31,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:31,595 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:31,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:31,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:31,796 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:33:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash 18223118, now seen corresponding path program 29 times [2021-10-13 21:33:31,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:31,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861141976] [2021-10-13 21:33:31,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:33:31,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:31,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:31,800 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:31,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-13 21:33:32,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 21:33:32,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:32,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:33:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:33:33,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:33:33,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:33,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861141976] [2021-10-13 21:33:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861141976] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:33,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:33,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-10-13 21:33:33,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844939737] [2021-10-13 21:33:33,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:33:33,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:33:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:33:33,877 INFO L87 Difference]: Start difference. First operand 26682 states and 145492 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:37,420 INFO L93 Difference]: Finished difference Result 57678 states and 291285 transitions. [2021-10-13 21:33:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:33:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:33:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:38,050 INFO L225 Difference]: With dead ends: 57678 [2021-10-13 21:33:38,051 INFO L226 Difference]: Without dead ends: 57500 [2021-10-13 21:33:38,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2603.9ms TimeCoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:33:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57500 states. [2021-10-13 21:33:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57500 to 32192. [2021-10-13 21:33:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32192 states, 32191 states have (on average 5.488304184399366) internal successors, (176674), 32191 states have internal predecessors, (176674), 0 states have call successors, (0), 0 states 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 21:33:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32192 states to 32192 states and 176674 transitions. [2021-10-13 21:33:39,908 INFO L78 Accepts]: Start accepts. Automaton has 32192 states and 176674 transitions. Word has length 28 [2021-10-13 21:33:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:39,908 INFO L470 AbstractCegarLoop]: Abstraction has 32192 states and 176674 transitions. [2021-10-13 21:33:39,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32192 states and 176674 transitions. [2021-10-13 21:33:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:33:40,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:40,423 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:40,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:40,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:40,639 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:33:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1990431676, now seen corresponding path program 30 times [2021-10-13 21:33:40,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:40,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423947511] [2021-10-13 21:33:40,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:33:40,640 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:40,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:40,642 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:40,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-13 21:33:41,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 21:33:41,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:33:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:42,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:42,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:42,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423947511] [2021-10-13 21:33:42,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423947511] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:42,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:42,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-13 21:33:42,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857692080] [2021-10-13 21:33:42,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:33:42,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:33:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:33:42,703 INFO L87 Difference]: Start difference. First operand 32192 states and 176674 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:33:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:45,230 INFO L93 Difference]: Finished difference Result 49784 states and 255605 transitions. [2021-10-13 21:33:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:33:45,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:33:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:45,461 INFO L225 Difference]: With dead ends: 49784 [2021-10-13 21:33:45,461 INFO L226 Difference]: Without dead ends: 49586 [2021-10-13 21:33:45,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1515.0ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:33:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49586 states. [2021-10-13 21:33:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49586 to 32850. [2021-10-13 21:33:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32850 states, 32849 states have (on average 5.497671161983622) internal successors, (180593), 32849 states have internal predecessors, (180593), 0 states have call successors, (0), 0 states 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 21:33:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32850 states to 32850 states and 180593 transitions. [2021-10-13 21:33:47,609 INFO L78 Accepts]: Start accepts. Automaton has 32850 states and 180593 transitions. Word has length 28 [2021-10-13 21:33:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:47,609 INFO L470 AbstractCegarLoop]: Abstraction has 32850 states and 180593 transitions. [2021-10-13 21:33:47,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 21:33:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 32850 states and 180593 transitions. [2021-10-13 21:33:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:33:47,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:47,706 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:47,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:47,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:47,907 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:33:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -348130650, now seen corresponding path program 31 times [2021-10-13 21:33:47,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:47,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268314560] [2021-10-13 21:33:47,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:33:47,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:47,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:47,910 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:47,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-13 21:33:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:33:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:33:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:49,422 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 21:33:49,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:33:50,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:50,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268314560] [2021-10-13 21:33:50,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268314560] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:50,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:50,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-13 21:33:50,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197859798] [2021-10-13 21:33:50,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:33:50,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:33:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:33:50,497 INFO L87 Difference]: Start difference. First operand 32850 states and 180593 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:58,905 INFO L93 Difference]: Finished difference Result 65102 states and 322260 transitions. [2021-10-13 21:33:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 21:33:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:33:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:59,273 INFO L225 Difference]: With dead ends: 65102 [2021-10-13 21:33:59,274 INFO L226 Difference]: Without dead ends: 65018 [2021-10-13 21:33:59,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 6145.1ms TimeCoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 21:33:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65018 states. [2021-10-13 21:34:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65018 to 33400. [2021-10-13 21:34:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33400 states, 33399 states have (on average 5.502380310787748) internal successors, (183774), 33399 states have internal predecessors, (183774), 0 states have call successors, (0), 0 states 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 21:34:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33400 states to 33400 states and 183774 transitions. [2021-10-13 21:34:01,600 INFO L78 Accepts]: Start accepts. Automaton has 33400 states and 183774 transitions. Word has length 28 [2021-10-13 21:34:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:01,600 INFO L470 AbstractCegarLoop]: Abstraction has 33400 states and 183774 transitions. [2021-10-13 21:34:01,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33400 states and 183774 transitions. [2021-10-13 21:34:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 21:34:01,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:01,701 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:01,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-10-13 21:34:01,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:01,902 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:34:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash -680928470, now seen corresponding path program 32 times [2021-10-13 21:34:01,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:01,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907699827] [2021-10-13 21:34:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:34:01,904 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:01,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:01,905 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:01,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-13 21:34:03,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:34:03,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:34:03,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:34:03,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:34:04,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:04,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907699827] [2021-10-13 21:34:04,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907699827] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:04,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:04,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-13 21:34:04,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86491208] [2021-10-13 21:34:04,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 21:34:04,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 21:34:04,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:34:04,707 INFO L87 Difference]: Start difference. First operand 33400 states and 183774 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 21:34:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:15,490 INFO L93 Difference]: Finished difference Result 63308 states and 314175 transitions. [2021-10-13 21:34:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 21:34:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 21:34:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:15,804 INFO L225 Difference]: With dead ends: 63308 [2021-10-13 21:34:15,804 INFO L226 Difference]: Without dead ends: 63178 [2021-10-13 21:34:15,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 7995.4ms TimeCoverageRelationStatistics Valid=1013, Invalid=2769, Unknown=0, NotChecked=0, Total=3782 [2021-10-13 21:34:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63178 states. [2021-10-13 21:34:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63178 to 34560. [2021-10-13 21:34:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34560 states, 34559 states have (on average 5.540495963424868) internal successors, (191474), 34559 states have internal predecessors, (191474), 0 states have call successors, (0), 0 states 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 21:34:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34560 states to 34560 states and 191474 transitions. [2021-10-13 21:34:17,988 INFO L78 Accepts]: Start accepts. Automaton has 34560 states and 191474 transitions. Word has length 28 [2021-10-13 21:34:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:17,989 INFO L470 AbstractCegarLoop]: Abstraction has 34560 states and 191474 transitions. [2021-10-13 21:34:17,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 21:34:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 34560 states and 191474 transitions. [2021-10-13 21:34:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 21:34:18,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:18,099 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:18,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-13 21:34:18,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:18,306 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:34:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1066837286, now seen corresponding path program 33 times [2021-10-13 21:34:18,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:18,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138984733] [2021-10-13 21:34:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:34:18,309 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:18,309 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:18,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-13 21:34:19,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 21:34:19,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:34:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:34:19,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:34:20,303 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:20,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138984733] [2021-10-13 21:34:20,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138984733] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:20,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:20,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-10-13 21:34:20,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946630202] [2021-10-13 21:34:20,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:34:20,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:34:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:34:20,305 INFO L87 Difference]: Start difference. First operand 34560 states and 191474 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:21,377 INFO L93 Difference]: Finished difference Result 61363 states and 335558 transitions. [2021-10-13 21:34:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:34:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 21:34:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:21,762 INFO L225 Difference]: With dead ends: 61363 [2021-10-13 21:34:21,763 INFO L226 Difference]: Without dead ends: 60704 [2021-10-13 21:34:21,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:34:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60704 states. [2021-10-13 21:34:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60704 to 42794. [2021-10-13 21:34:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42794 states, 42793 states have (on average 5.561704017012128) internal successors, (238002), 42793 states have internal predecessors, (238002), 0 states have call successors, (0), 0 states 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 21:34:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42794 states to 42794 states and 238002 transitions. [2021-10-13 21:34:24,263 INFO L78 Accepts]: Start accepts. Automaton has 42794 states and 238002 transitions. Word has length 29 [2021-10-13 21:34:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:24,264 INFO L470 AbstractCegarLoop]: Abstraction has 42794 states and 238002 transitions. [2021-10-13 21:34:24,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 42794 states and 238002 transitions. [2021-10-13 21:34:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 21:34:24,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:24,418 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:24,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-10-13 21:34:24,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:24,619 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:34:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1783587269, now seen corresponding path program 34 times [2021-10-13 21:34:24,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:24,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647362572] [2021-10-13 21:34:24,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:34:24,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:24,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:24,638 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:24,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-13 21:34:26,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:34:26,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:34:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:34:26,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:34:27,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:27,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647362572] [2021-10-13 21:34:27,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647362572] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:27,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:27,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:34:27,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530124149] [2021-10-13 21:34:27,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:34:27,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:34:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:34:27,799 INFO L87 Difference]: Start difference. First operand 42794 states and 238002 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:34:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:35,764 INFO L93 Difference]: Finished difference Result 99030 states and 503158 transitions. [2021-10-13 21:34:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 21:34:35,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 21:34:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:36,470 INFO L225 Difference]: With dead ends: 99030 [2021-10-13 21:34:36,470 INFO L226 Difference]: Without dead ends: 98930 [2021-10-13 21:34:36,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 6023.6ms TimeCoverageRelationStatistics Valid=723, Invalid=2033, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 21:34:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98930 states. [2021-10-13 21:34:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98930 to 49766. [2021-10-13 21:34:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49766 states, 49765 states have (on average 5.627649954787501) internal successors, (280060), 49765 states have internal predecessors, (280060), 0 states have call successors, (0), 0 states 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 21:34:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49766 states to 49766 states and 280060 transitions. [2021-10-13 21:34:41,168 INFO L78 Accepts]: Start accepts. Automaton has 49766 states and 280060 transitions. Word has length 29 [2021-10-13 21:34:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:41,168 INFO L470 AbstractCegarLoop]: Abstraction has 49766 states and 280060 transitions. [2021-10-13 21:34:41,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:34:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand 49766 states and 280060 transitions. [2021-10-13 21:34:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 21:34:41,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:41,431 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:41,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-13 21:34:41,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:41,639 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:34:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2107597729, now seen corresponding path program 35 times [2021-10-13 21:34:41,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:41,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837651957] [2021-10-13 21:34:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:34:41,640 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:41,641 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:41,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-13 21:34:42,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 21:34:42,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:34:42,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:34:43,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:34:43,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:43,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837651957] [2021-10-13 21:34:43,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837651957] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:43,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:43,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 21:34:43,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619554366] [2021-10-13 21:34:43,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 21:34:43,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 21:34:43,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:34:43,789 INFO L87 Difference]: Start difference. First operand 49766 states and 280060 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 21:34:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:46,767 INFO L93 Difference]: Finished difference Result 84650 states and 454547 transitions. [2021-10-13 21:34:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:34:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 21:34:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:47,391 INFO L225 Difference]: With dead ends: 84650 [2021-10-13 21:34:47,391 INFO L226 Difference]: Without dead ends: 84630 [2021-10-13 21:34:47,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1425.8ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:34:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84630 states. [2021-10-13 21:34:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84630 to 60482. [2021-10-13 21:34:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60482 states, 60481 states have (on average 5.708106678130322) internal successors, (345232), 60481 states have internal predecessors, (345232), 0 states have call successors, (0), 0 states 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 21:34:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60482 states to 60482 states and 345232 transitions. [2021-10-13 21:34:52,016 INFO L78 Accepts]: Start accepts. Automaton has 60482 states and 345232 transitions. Word has length 29 [2021-10-13 21:34:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:52,017 INFO L470 AbstractCegarLoop]: Abstraction has 60482 states and 345232 transitions. [2021-10-13 21:34:52,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 21:34:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 60482 states and 345232 transitions. [2021-10-13 21:34:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 21:34:52,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:52,222 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:52,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-13 21:34:52,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:52,431 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:34:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 599171253, now seen corresponding path program 36 times [2021-10-13 21:34:52,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:52,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727950255] [2021-10-13 21:34:52,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:34:52,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:52,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:52,434 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:52,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-13 21:34:54,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 21:34:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:54,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:34:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 21:34:54,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:34:55,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:55,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727950255] [2021-10-13 21:34:55,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727950255] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:55,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:55,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-10-13 21:34:55,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498221326] [2021-10-13 21:34:55,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:34:55,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:55,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:34:55,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:34:55,661 INFO L87 Difference]: Start difference. First operand 60482 states and 345232 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:35:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:05,314 INFO L93 Difference]: Finished difference Result 124362 states and 637032 transitions. [2021-10-13 21:35:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 21:35:05,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 21:35:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:07,019 INFO L225 Difference]: With dead ends: 124362 [2021-10-13 21:35:07,020 INFO L226 Difference]: Without dead ends: 123894 [2021-10-13 21:35:07,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 7043.4ms TimeCoverageRelationStatistics Valid=655, Invalid=2101, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 21:35:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123894 states. [2021-10-13 21:35:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123894 to 58580. [2021-10-13 21:35:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58580 states, 58579 states have (on average 5.643933832943547) internal successors, (330616), 58579 states have internal predecessors, (330616), 0 states have call successors, (0), 0 states 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 21:35:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58580 states to 58580 states and 330616 transitions. [2021-10-13 21:35:12,046 INFO L78 Accepts]: Start accepts. Automaton has 58580 states and 330616 transitions. Word has length 30 [2021-10-13 21:35:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:12,046 INFO L470 AbstractCegarLoop]: Abstraction has 58580 states and 330616 transitions. [2021-10-13 21:35:12,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:35:12,046 INFO L276 IsEmpty]: Start isEmpty. Operand 58580 states and 330616 transitions. [2021-10-13 21:35:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 21:35:12,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:12,795 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:12,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:13,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:13,011 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:35:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1530464729, now seen corresponding path program 37 times [2021-10-13 21:35:13,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:13,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615706401] [2021-10-13 21:35:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:35:13,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:13,015 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-13 21:35:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:14,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:35:14,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:35:14,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:35:15,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:15,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615706401] [2021-10-13 21:35:15,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615706401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:15,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:15,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:35:15,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444472136] [2021-10-13 21:35:15,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:35:15,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:35:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:35:15,592 INFO L87 Difference]: Start difference. First operand 58580 states and 330616 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:35:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:21,051 INFO L93 Difference]: Finished difference Result 110744 states and 579271 transitions. [2021-10-13 21:35:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 21:35:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 21:35:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:21,834 INFO L225 Difference]: With dead ends: 110744 [2021-10-13 21:35:21,834 INFO L226 Difference]: Without dead ends: 110602 [2021-10-13 21:35:21,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 3672.4ms TimeCoverageRelationStatistics Valid=502, Invalid=1220, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 21:35:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110602 states. [2021-10-13 21:35:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110602 to 55982. [2021-10-13 21:35:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55982 states, 55981 states have (on average 5.609903360068595) internal successors, (314048), 55981 states have internal predecessors, (314048), 0 states have call successors, (0), 0 states 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 21:35:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55982 states to 55982 states and 314048 transitions. [2021-10-13 21:35:26,404 INFO L78 Accepts]: Start accepts. Automaton has 55982 states and 314048 transitions. Word has length 30 [2021-10-13 21:35:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 55982 states and 314048 transitions. [2021-10-13 21:35:26,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:35:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 55982 states and 314048 transitions. [2021-10-13 21:35:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 21:35:26,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:26,612 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:26,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:26,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:26,813 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:35:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1307358533, now seen corresponding path program 38 times [2021-10-13 21:35:26,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:26,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530230782] [2021-10-13 21:35:26,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:35:26,816 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:26,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:26,817 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:26,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-13 21:35:28,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:35:28,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:28,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:35:28,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:35:29,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:35:30,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:30,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530230782] [2021-10-13 21:35:30,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530230782] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:30,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:30,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:35:30,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721670006] [2021-10-13 21:35:30,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:35:30,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:35:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:35:30,220 INFO L87 Difference]: Start difference. First operand 55982 states and 314048 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 21:35:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:37,352 INFO L93 Difference]: Finished difference Result 105554 states and 548249 transitions. [2021-10-13 21:35:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 21:35:37,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 21:35:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:38,498 INFO L225 Difference]: With dead ends: 105554 [2021-10-13 21:35:38,499 INFO L226 Difference]: Without dead ends: 105452 [2021-10-13 21:35:38,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 5553.6ms TimeCoverageRelationStatistics Valid=551, Invalid=1429, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 21:35:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105452 states. [2021-10-13 21:35:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105452 to 55782. [2021-10-13 21:35:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55782 states, 55781 states have (on average 5.594736559043402) internal successors, (312080), 55781 states have internal predecessors, (312080), 0 states have call successors, (0), 0 states 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 21:35:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55782 states to 55782 states and 312080 transitions. [2021-10-13 21:35:42,659 INFO L78 Accepts]: Start accepts. Automaton has 55782 states and 312080 transitions. Word has length 30 [2021-10-13 21:35:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:42,660 INFO L470 AbstractCegarLoop]: Abstraction has 55782 states and 312080 transitions. [2021-10-13 21:35:42,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 21:35:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 55782 states and 312080 transitions. [2021-10-13 21:35:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 21:35:43,344 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:43,344 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:43,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-10-13 21:35:43,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:43,559 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:35:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:43,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1103463369, now seen corresponding path program 39 times [2021-10-13 21:35:43,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:43,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587968842] [2021-10-13 21:35:43,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:35:43,562 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:43,563 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:43,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-13 21:35:44,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:35:44,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:35:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:35:45,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:35:45,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:45,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587968842] [2021-10-13 21:35:45,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587968842] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:45,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:45,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:35:45,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320406518] [2021-10-13 21:35:45,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:35:45,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:35:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:35:45,635 INFO L87 Difference]: Start difference. First operand 55782 states and 312080 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:47,663 INFO L93 Difference]: Finished difference Result 67036 states and 361359 transitions. [2021-10-13 21:35:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 21:35:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 21:35:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:48,061 INFO L225 Difference]: With dead ends: 67036 [2021-10-13 21:35:48,061 INFO L226 Difference]: Without dead ends: 65778 [2021-10-13 21:35:48,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1122.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-10-13 21:35:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65778 states. [2021-10-13 21:35:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65778 to 56928. [2021-10-13 21:35:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56928 states, 56927 states have (on average 5.5657420907478) internal successors, (316841), 56927 states have internal predecessors, (316841), 0 states have call successors, (0), 0 states 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 21:35:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56928 states to 56928 states and 316841 transitions. [2021-10-13 21:35:51,500 INFO L78 Accepts]: Start accepts. Automaton has 56928 states and 316841 transitions. Word has length 30 [2021-10-13 21:35:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:51,500 INFO L470 AbstractCegarLoop]: Abstraction has 56928 states and 316841 transitions. [2021-10-13 21:35:51,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 56928 states and 316841 transitions. [2021-10-13 21:35:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 21:35:51,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:51,805 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:51,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:52,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:52,014 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:35:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1703607829, now seen corresponding path program 40 times [2021-10-13 21:35:52,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:52,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411613374] [2021-10-13 21:35:52,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:35:52,016 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:52,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:52,017 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:52,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-13 21:35:53,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:35:53,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:53,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:35:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:35:53,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:35:53,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:53,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411613374] [2021-10-13 21:35:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411613374] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:53,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:53,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:35:53,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9987405] [2021-10-13 21:35:53,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:35:53,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:35:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:35:53,999 INFO L87 Difference]: Start difference. First operand 56928 states and 316841 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:35:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:56,178 INFO L93 Difference]: Finished difference Result 92292 states and 481388 transitions. [2021-10-13 21:35:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 21:35:56,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 21:35:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:57,283 INFO L225 Difference]: With dead ends: 92292 [2021-10-13 21:35:57,283 INFO L226 Difference]: Without dead ends: 91828 [2021-10-13 21:35:57,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 825.6ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-10-13 21:35:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91828 states. [2021-10-13 21:36:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91828 to 57578. [2021-10-13 21:36:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57578 states, 57577 states have (on average 5.61510672664432) internal successors, (323301), 57577 states have internal predecessors, (323301), 0 states have call successors, (0), 0 states 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 21:36:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57578 states to 57578 states and 323301 transitions. [2021-10-13 21:36:01,417 INFO L78 Accepts]: Start accepts. Automaton has 57578 states and 323301 transitions. Word has length 30 [2021-10-13 21:36:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:01,430 INFO L470 AbstractCegarLoop]: Abstraction has 57578 states and 323301 transitions. [2021-10-13 21:36:01,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:36:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 57578 states and 323301 transitions. [2021-10-13 21:36:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 21:36:01,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:01,656 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:36:01,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:01,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:36:01,857 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:36:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1630859811, now seen corresponding path program 41 times [2021-10-13 21:36:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:01,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840785905] [2021-10-13 21:36:01,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:36:01,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:01,861 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:36:01,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-13 21:36:03,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 21:36:03,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:36:03,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:36:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:36:03,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:36:06,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:06,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840785905] [2021-10-13 21:36:06,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840785905] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:36:06,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:36:06,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-13 21:36:06,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823451431] [2021-10-13 21:36:06,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 21:36:06,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:06,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 21:36:06,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:36:06,394 INFO L87 Difference]: Start difference. First operand 57578 states and 323301 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 21:36:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:11,833 INFO L93 Difference]: Finished difference Result 72404 states and 395229 transitions. [2021-10-13 21:36:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:36:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 21:36:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:12,261 INFO L225 Difference]: With dead ends: 72404 [2021-10-13 21:36:12,261 INFO L226 Difference]: Without dead ends: 71942 [2021-10-13 21:36:12,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 5208.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1004, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:36:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71942 states. [2021-10-13 21:36:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71942 to 57970. [2021-10-13 21:36:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57970 states, 57969 states have (on average 5.585243837223343) internal successors, (323771), 57969 states have internal predecessors, (323771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)