/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 19:50:05,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 19:50:05,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 19:50:05,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 19:50:05,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 19:50:05,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 19:50:05,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 19:50:05,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 19:50:05,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 19:50:05,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 19:50:05,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 19:50:05,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 19:50:05,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 19:50:05,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 19:50:05,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 19:50:05,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 19:50:05,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 19:50:05,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 19:50:05,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 19:50:05,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 19:50:05,544 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 19:50:05,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 19:50:05,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 19:50:05,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 19:50:05,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 19:50:05,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 19:50:05,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 19:50:05,603 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 19:50:05,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 19:50:05,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 19:50:05,604 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 19:50:05,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 19:50:05,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 19:50:05,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 19:50:05,605 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 19:50:05,606 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 19:50:05,606 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 19:50:05,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 19:50:05,606 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 19:50:05,607 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 19:50:05,607 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 19:50:05,607 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 19:50:05,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 19:50:05,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 19:50:05,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 19:50:05,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 19:50:05,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:50:05,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 19:50:05,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 19:50:05,609 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 19:50:05,609 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 19:50:05,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 19:50:05,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 19:50:05,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 19:50:06,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 19:50:06,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 19:50:06,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 19:50:06,134 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 19:50:06,135 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 19:50:06,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-10-13 19:50:06,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d38da74ab/47255c623ab9489383a3c865d9d4667a/FLAGffecea111 [2021-10-13 19:50:07,049 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 19:50:07,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-10-13 19:50:07,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d38da74ab/47255c623ab9489383a3c865d9d4667a/FLAGffecea111 [2021-10-13 19:50:07,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d38da74ab/47255c623ab9489383a3c865d9d4667a [2021-10-13 19:50:07,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 19:50:07,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 19:50:07,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 19:50:07,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 19:50:07,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 19:50:07,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e38f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07, skipping insertion in model container [2021-10-13 19:50:07,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 19:50:07,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 19:50:07,635 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2021-10-13 19:50:07,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:50:07,674 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 19:50:07,745 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2021-10-13 19:50:07,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:50:07,784 INFO L208 MainTranslator]: Completed translation [2021-10-13 19:50:07,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07 WrapperNode [2021-10-13 19:50:07,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 19:50:07,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 19:50:07,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 19:50:07,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 19:50:07,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 19:50:07,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 19:50:07,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 19:50:07,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 19:50:07,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 19:50:07,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 19:50:07,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 19:50:07,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 19:50:07,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:50:07,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:50:08,014 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 19:50:08,027 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 19:50:08,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 19:50:08,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 19:50:08,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 19:50:08,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 19:50:08,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 19:50:08,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 19:50:08,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 19:50:08,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-13 19:50:08,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-13 19:50:08,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-10-13 19:50:08,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-10-13 19:50:08,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-10-13 19:50:08,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-10-13 19:50:08,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 19:50:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 19:50:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 19:50:08,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 19:50:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 19:50:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 19:50:08,103 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 19:50:09,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 19:50:09,028 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-13 19:50:09,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:09 BoogieIcfgContainer [2021-10-13 19:50:09,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 19:50:09,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 19:50:09,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 19:50:09,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 19:50:09,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:50:07" (1/3) ... [2021-10-13 19:50:09,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6406bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:09, skipping insertion in model container [2021-10-13 19:50:09,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (2/3) ... [2021-10-13 19:50:09,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6406bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:09, skipping insertion in model container [2021-10-13 19:50:09,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:09" (3/3) ... [2021-10-13 19:50:09,042 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2021-10-13 19:50:09,048 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 19:50:09,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-13 19:50:09,049 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 19:50:09,128 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,129 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,129 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,129 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,130 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,130 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,131 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,131 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,132 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,132 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,132 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,132 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,136 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,137 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,137 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,137 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,142 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,143 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,143 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,143 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,144 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,145 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,145 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,145 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,156 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,156 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,168 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,169 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,178 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,178 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,189 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,189 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,192 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,193 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:09,281 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-10-13 19:50:09,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 19:50:09,397 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 19:50:09,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2021-10-13 19:50:09,428 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 19:50:09,443 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 189 transitions, 426 flow [2021-10-13 19:50:09,446 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 189 transitions, 426 flow [2021-10-13 19:50:09,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 194 places, 189 transitions, 426 flow [2021-10-13 19:50:09,548 INFO L129 PetriNetUnfolder]: 14/183 cut-off events. [2021-10-13 19:50:09,549 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-13 19:50:09,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 183 events. 14/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2021-10-13 19:50:09,618 INFO L116 LiptonReduction]: Number of co-enabled transitions 3780 [2021-10-13 19:50:45,818 WARN L207 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 152 DAG size of output: 145 [2021-10-13 19:50:48,392 INFO L131 LiptonReduction]: Checked pairs total: 5366 [2021-10-13 19:50:48,392 INFO L133 LiptonReduction]: Total number of compositions: 179 [2021-10-13 19:50:48,405 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 69 transitions, 186 flow [2021-10-13 19:50:48,507 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 759 states, 733 states have (on average 5.8594815825375175) internal successors, (4295), 758 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 759 states, 733 states have (on average 5.8594815825375175) internal successors, (4295), 758 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-13 19:50:48,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:48,520 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-13 19:50:48,520 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash 685, now seen corresponding path program 1 times [2021-10-13 19:50:48,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:48,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692571057] [2021-10-13 19:50:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:48,542 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:48,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:48,546 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 19:50:48,567 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 19:50:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 19:50:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:48,638 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 19:50:48,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:48,639 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 19:50:48,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:48,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692571057] [2021-10-13 19:50:48,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692571057] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:48,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:48,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-13 19:50:48,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011215716] [2021-10-13 19:50:48,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 19:50:48,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 19:50:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 19:50:48,672 INFO L87 Difference]: Start difference. First operand has 759 states, 733 states have (on average 5.8594815825375175) internal successors, (4295), 758 states have internal predecessors, (4295), 0 states have call successors, (0), 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 19:50:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:48,744 INFO L93 Difference]: Finished difference Result 756 states and 4292 transitions. [2021-10-13 19:50:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 19:50:48,749 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 19:50:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:48,797 INFO L225 Difference]: With dead ends: 756 [2021-10-13 19:50:48,799 INFO L226 Difference]: Without dead ends: 756 [2021-10-13 19:50:48,805 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 19:50:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-10-13 19:50:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 756. [2021-10-13 19:50:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 733 states have (on average 5.855388813096862) internal successors, (4292), 755 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 4292 transitions. [2021-10-13 19:50:48,942 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 4292 transitions. Word has length 1 [2021-10-13 19:50:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:48,943 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 4292 transitions. [2021-10-13 19:50:48,943 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 19:50:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 4292 transitions. [2021-10-13 19:50:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:50:48,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:48,944 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:50:48,957 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 19:50:49,157 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 19:50:49,158 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:49,160 INFO L82 PathProgramCache]: Analyzing trace with hash 675309, now seen corresponding path program 1 times [2021-10-13 19:50:49,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:49,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526362470] [2021-10-13 19:50:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:49,162 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:49,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:49,164 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 19:50:49,167 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 19:50:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:50:49,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:49,678 INFO L354 Elim1Store]: treesize reduction 269, result has 13.2 percent of original size [2021-10-13 19:50:49,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 83 treesize of output 101 [2021-10-13 19:50:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:50,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:50,373 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 19:50:50,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:50,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526362470] [2021-10-13 19:50:50,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526362470] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:50,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:50,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:50,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385376472] [2021-10-13 19:50:50,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:50,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:50,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:50,378 INFO L87 Difference]: Start difference. First operand 756 states and 4292 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 19:50:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:50,682 INFO L93 Difference]: Finished difference Result 722 states and 4096 transitions. [2021-10-13 19:50:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:50,683 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 19:50:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:50,695 INFO L225 Difference]: With dead ends: 722 [2021-10-13 19:50:50,695 INFO L226 Difference]: Without dead ends: 722 [2021-10-13 19:50:50,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-10-13 19:50:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2021-10-13 19:50:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 701 states have (on average 5.843081312410842) internal successors, (4096), 721 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 4096 transitions. [2021-10-13 19:50:50,778 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 4096 transitions. Word has length 3 [2021-10-13 19:50:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:50,779 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 4096 transitions. [2021-10-13 19:50:50,780 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 19:50:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 4096 transitions. [2021-10-13 19:50:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:50:50,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:50,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:50:50,794 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 19:50:50,990 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 19:50:50,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash 675307, now seen corresponding path program 1 times [2021-10-13 19:50:50,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:50,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901107539] [2021-10-13 19:50:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:50,995 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:50,998 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 19:50:50,999 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 19:50:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:51,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:50:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:51,804 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-13 19:50:51,804 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 7 case distinctions, treesize of input 80 treesize of output 134 [2021-10-13 19:50:51,826 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 19:50:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 137 [2021-10-13 19:50:52,714 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 19:50:52,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:52,771 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 19:50:52,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:52,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901107539] [2021-10-13 19:50:52,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901107539] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:52,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:52,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:52,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671326412] [2021-10-13 19:50:52,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:52,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:52,776 INFO L87 Difference]: Start difference. First operand 722 states and 4096 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 19:50:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:53,113 INFO L93 Difference]: Finished difference Result 688 states and 3900 transitions. [2021-10-13 19:50:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:53,117 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 19:50:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:53,130 INFO L225 Difference]: With dead ends: 688 [2021-10-13 19:50:53,130 INFO L226 Difference]: Without dead ends: 688 [2021-10-13 19:50:53,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-10-13 19:50:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 688. [2021-10-13 19:50:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 669 states have (on average 5.829596412556054) internal successors, (3900), 687 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 3900 transitions. [2021-10-13 19:50:53,209 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 3900 transitions. Word has length 3 [2021-10-13 19:50:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:53,209 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 3900 transitions. [2021-10-13 19:50:53,209 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 19:50:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 3900 transitions. [2021-10-13 19:50:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:50:53,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:53,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:50:53,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 19:50:53,424 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 19:50:53,425 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 648985899, now seen corresponding path program 1 times [2021-10-13 19:50:53,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:53,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789452980] [2021-10-13 19:50:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:53,428 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:53,429 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 19:50:53,431 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 19:50:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:50:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:53,697 INFO L354 Elim1Store]: treesize reduction 253, result has 13.9 percent of original size [2021-10-13 19:50:53,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 66 treesize of output 86 [2021-10-13 19:50:54,577 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 19:50:54,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:54,600 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 19:50:54,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:54,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789452980] [2021-10-13 19:50:54,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789452980] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:54,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:54,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:54,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028860387] [2021-10-13 19:50:54,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:54,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:54,603 INFO L87 Difference]: Start difference. First operand 688 states and 3900 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 19:50:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:54,865 INFO L93 Difference]: Finished difference Result 668 states and 3808 transitions. [2021-10-13 19:50:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:54,866 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 19:50:54,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:54,876 INFO L225 Difference]: With dead ends: 668 [2021-10-13 19:50:54,876 INFO L226 Difference]: Without dead ends: 668 [2021-10-13 19:50:54,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-10-13 19:50:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-10-13 19:50:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 651 states have (on average 5.849462365591398) internal successors, (3808), 667 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 3808 transitions. [2021-10-13 19:50:54,921 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 3808 transitions. Word has length 5 [2021-10-13 19:50:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:54,921 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 3808 transitions. [2021-10-13 19:50:54,922 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 19:50:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 3808 transitions. [2021-10-13 19:50:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:50:54,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:54,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:50:54,936 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 19:50:55,135 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 19:50:55,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash 648985900, now seen corresponding path program 1 times [2021-10-13 19:50:55,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:55,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841751766] [2021-10-13 19:50:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:55,141 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:55,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:55,142 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 19:50:55,145 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 19:50:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:50:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:55,807 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-13 19:50:55,807 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 7 case distinctions, treesize of input 65 treesize of output 119 [2021-10-13 19:50:55,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 19:50:55,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 122 [2021-10-13 19:50:56,888 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 19:50:56,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:56,962 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 19:50:56,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:56,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841751766] [2021-10-13 19:50:56,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841751766] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:56,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:56,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:56,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159772720] [2021-10-13 19:50:56,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:56,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:56,969 INFO L87 Difference]: Start difference. First operand 668 states and 3808 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 19:50:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:57,251 INFO L93 Difference]: Finished difference Result 648 states and 3716 transitions. [2021-10-13 19:50:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:57,252 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 19:50:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:57,263 INFO L225 Difference]: With dead ends: 648 [2021-10-13 19:50:57,263 INFO L226 Difference]: Without dead ends: 648 [2021-10-13 19:50:57,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-10-13 19:50:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2021-10-13 19:50:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 633 states have (on average 5.8704581358609795) internal successors, (3716), 647 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 3716 transitions. [2021-10-13 19:50:57,303 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 3716 transitions. Word has length 5 [2021-10-13 19:50:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:57,304 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 3716 transitions. [2021-10-13 19:50:57,304 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 19:50:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 3716 transitions. [2021-10-13 19:50:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:50:57,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:57,305 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:57,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 19:50:57,523 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 19:50:57,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash 905208110, now seen corresponding path program 1 times [2021-10-13 19:50:57,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:57,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225805483] [2021-10-13 19:50:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:57,526 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:57,528 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 19:50:57,529 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 19:50:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 19:50:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:57,770 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-13 19:50:57,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 67 [2021-10-13 19:50:58,534 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 19:50:58,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:58,565 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 19:50:58,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:58,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225805483] [2021-10-13 19:50:58,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225805483] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:58,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:58,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:58,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411781282] [2021-10-13 19:50:58,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:58,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:58,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:58,570 INFO L87 Difference]: Start difference. First operand 648 states and 3716 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 19:50:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:58,677 INFO L93 Difference]: Finished difference Result 632 states and 3652 transitions. [2021-10-13 19:50:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:58,679 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 19:50:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:58,695 INFO L225 Difference]: With dead ends: 632 [2021-10-13 19:50:58,695 INFO L226 Difference]: Without dead ends: 632 [2021-10-13 19:50:58,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-10-13 19:50:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2021-10-13 19:50:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 619 states have (on average 5.89983844911147) internal successors, (3652), 631 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 3652 transitions. [2021-10-13 19:50:58,737 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 3652 transitions. Word has length 7 [2021-10-13 19:50:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:58,738 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 3652 transitions. [2021-10-13 19:50:58,738 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 19:50:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 3652 transitions. [2021-10-13 19:50:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:50:58,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:58,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:50:58,757 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 19:50:58,959 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 19:50:58,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:58,960 INFO L82 PathProgramCache]: Analyzing trace with hash 905208112, now seen corresponding path program 1 times [2021-10-13 19:50:58,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:58,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188251602] [2021-10-13 19:50:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:58,961 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:58,963 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 19:50:58,999 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 19:50:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:50:59,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:59,475 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-13 19:50:59,476 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 7 case distinctions, treesize of input 47 treesize of output 101 [2021-10-13 19:50:59,487 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 105 treesize of output 103 [2021-10-13 19:51:00,406 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 19:51:00,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:00,510 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 19:51:00,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:00,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188251602] [2021-10-13 19:51:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188251602] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:00,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:00,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:51:00,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111032415] [2021-10-13 19:51:00,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:00,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:00,513 INFO L87 Difference]: Start difference. First operand 632 states and 3652 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 19:51:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:00,622 INFO L93 Difference]: Finished difference Result 616 states and 3588 transitions. [2021-10-13 19:51:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:00,624 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 19:51:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:00,634 INFO L225 Difference]: With dead ends: 616 [2021-10-13 19:51:00,634 INFO L226 Difference]: Without dead ends: 616 [2021-10-13 19:51:00,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-10-13 19:51:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-10-13 19:51:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 605 states have (on average 5.9305785123966945) internal successors, (3588), 615 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 3588 transitions. [2021-10-13 19:51:00,671 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 3588 transitions. Word has length 7 [2021-10-13 19:51:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:00,671 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 3588 transitions. [2021-10-13 19:51:00,671 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 19:51:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 3588 transitions. [2021-10-13 19:51:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:51:00,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:00,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:00,686 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 19:51:00,886 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 19:51:00,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1973351447, now seen corresponding path program 1 times [2021-10-13 19:51:00,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:00,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877353023] [2021-10-13 19:51:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:00,889 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:00,890 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 19:51:00,892 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 19:51:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 19:51:01,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:01,134 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-13 19:51:01,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 46 [2021-10-13 19:51:01,191 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 19:51:01,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:01,218 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 19:51:01,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:01,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877353023] [2021-10-13 19:51:01,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877353023] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:01,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:01,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 19:51:01,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578355782] [2021-10-13 19:51:01,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:51:01,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:51:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:51:01,225 INFO L87 Difference]: Start difference. First operand 616 states and 3588 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 19:51:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:01,305 INFO L93 Difference]: Finished difference Result 596 states and 3496 transitions. [2021-10-13 19:51:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:01,306 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 19:51:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:01,316 INFO L225 Difference]: With dead ends: 596 [2021-10-13 19:51:01,316 INFO L226 Difference]: Without dead ends: 596 [2021-10-13 19:51:01,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:51:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-10-13 19:51:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-10-13 19:51:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 587 states have (on average 5.955706984667803) internal successors, (3496), 595 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 3496 transitions. [2021-10-13 19:51:01,345 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 3496 transitions. Word has length 9 [2021-10-13 19:51:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:01,346 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 3496 transitions. [2021-10-13 19:51:01,346 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 19:51:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 3496 transitions. [2021-10-13 19:51:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:51:01,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:01,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:01,366 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 19:51:01,563 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 19:51:01,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1973351446, now seen corresponding path program 1 times [2021-10-13 19:51:01,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:01,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012290603] [2021-10-13 19:51:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:01,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:01,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:01,568 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 19:51:01,569 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 19:51:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 19:51:01,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:02,168 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-13 19:51:02,169 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 7 case distinctions, treesize of input 27 treesize of output 82 [2021-10-13 19:51:02,310 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 19:51:02,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:02,443 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 19:51:02,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:02,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012290603] [2021-10-13 19:51:02,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012290603] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:02,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:02,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:51:02,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842529132] [2021-10-13 19:51:02,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:02,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:02,447 INFO L87 Difference]: Start difference. First operand 596 states and 3496 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:02,516 INFO L93 Difference]: Finished difference Result 576 states and 3404 transitions. [2021-10-13 19:51:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 19:51:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:02,526 INFO L225 Difference]: With dead ends: 576 [2021-10-13 19:51:02,526 INFO L226 Difference]: Without dead ends: 576 [2021-10-13 19:51:02,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-10-13 19:51:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-10-13 19:51:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 569 states have (on average 5.982425307557118) internal successors, (3404), 575 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 3404 transitions. [2021-10-13 19:51:02,557 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 3404 transitions. Word has length 9 [2021-10-13 19:51:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:02,558 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 3404 transitions. [2021-10-13 19:51:02,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 3404 transitions. [2021-10-13 19:51:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:51:02,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:02,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:02,574 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 19:51:02,774 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 19:51:02,774 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1984821414, now seen corresponding path program 1 times [2021-10-13 19:51:02,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:02,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498543137] [2021-10-13 19:51:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:02,777 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:02,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:02,778 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 19:51:02,782 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 19:51:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 19:51:02,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:03,032 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-13 19:51:03,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 46 [2021-10-13 19:51:03,100 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 19:51:03,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:03,135 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 19:51:03,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:03,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498543137] [2021-10-13 19:51:03,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498543137] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:03,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:03,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 19:51:03,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739871468] [2021-10-13 19:51:03,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:51:03,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:51:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:51:03,139 INFO L87 Difference]: Start difference. First operand 576 states and 3404 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:03,194 INFO L93 Difference]: Finished difference Result 542 states and 3208 transitions. [2021-10-13 19:51:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 19:51:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:03,204 INFO L225 Difference]: With dead ends: 542 [2021-10-13 19:51:03,204 INFO L226 Difference]: Without dead ends: 542 [2021-10-13 19:51:03,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:51:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-13 19:51:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-10-13 19:51:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 5.973929236499069) internal successors, (3208), 541 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 3208 transitions. [2021-10-13 19:51:03,232 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 3208 transitions. Word has length 11 [2021-10-13 19:51:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:03,233 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 3208 transitions. [2021-10-13 19:51:03,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 3208 transitions. [2021-10-13 19:51:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:51:03,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:03,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:03,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-13 19:51:03,447 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 19:51:03,448 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1984821416, now seen corresponding path program 1 times [2021-10-13 19:51:03,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:03,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679376719] [2021-10-13 19:51:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:03,450 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:03,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:03,452 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 19:51:03,453 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 19:51:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 19:51:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:03,971 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-13 19:51:03,972 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 7 case distinctions, treesize of input 27 treesize of output 82 [2021-10-13 19:51:04,125 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 19:51:04,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:04,255 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 19:51:04,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:04,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679376719] [2021-10-13 19:51:04,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679376719] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:04,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:04,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:51:04,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309685654] [2021-10-13 19:51:04,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:04,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:04,257 INFO L87 Difference]: Start difference. First operand 542 states and 3208 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:04,315 INFO L93 Difference]: Finished difference Result 508 states and 3012 transitions. [2021-10-13 19:51:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 19:51:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:04,322 INFO L225 Difference]: With dead ends: 508 [2021-10-13 19:51:04,323 INFO L226 Difference]: Without dead ends: 508 [2021-10-13 19:51:04,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-10-13 19:51:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2021-10-13 19:51:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 505 states have (on average 5.964356435643564) internal successors, (3012), 507 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 3012 transitions. [2021-10-13 19:51:04,348 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 3012 transitions. Word has length 11 [2021-10-13 19:51:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:04,349 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 3012 transitions. [2021-10-13 19:51:04,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 3012 transitions. [2021-10-13 19:51:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:51:04,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:04,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:04,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 19:51:04,564 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 19:51:04,564 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash 447915403, now seen corresponding path program 1 times [2021-10-13 19:51:04,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:04,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124193538] [2021-10-13 19:51:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:04,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:04,568 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 19:51:04,571 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 19:51:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:51:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:05,144 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-13 19:51:05,144 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 7 case distinctions, treesize of input 37 treesize of output 91 [2021-10-13 19:51:05,155 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 92 treesize of output 90 [2021-10-13 19:51:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:05,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:06,517 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 19:51:06,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:06,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124193538] [2021-10-13 19:51:06,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124193538] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:06,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:06,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-13 19:51:06,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071243877] [2021-10-13 19:51:06,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:51:06,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:51:06,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:06,520 INFO L87 Difference]: Start difference. First operand 508 states and 3012 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:06,666 INFO L93 Difference]: Finished difference Result 444 states and 2564 transitions. [2021-10-13 19:51:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:06,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 19:51:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:06,673 INFO L225 Difference]: With dead ends: 444 [2021-10-13 19:51:06,673 INFO L226 Difference]: Without dead ends: 444 [2021-10-13 19:51:06,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-10-13 19:51:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-10-13 19:51:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 442 states have (on average 5.800904977375565) internal successors, (2564), 443 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 2564 transitions. [2021-10-13 19:51:06,695 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 2564 transitions. Word has length 13 [2021-10-13 19:51:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:06,695 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 2564 transitions. [2021-10-13 19:51:06,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 2564 transitions. [2021-10-13 19:51:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:51:06,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:06,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:06,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 19:51:06,910 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 19:51:06,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash 447915404, now seen corresponding path program 1 times [2021-10-13 19:51:06,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:06,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941242439] [2021-10-13 19:51:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:06,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:06,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:06,914 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 19:51:06,914 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 19:51:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:07,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:51:07,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:07,238 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-13 19:51:07,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 46 [2021-10-13 19:51:07,505 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 19:51:07,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:07,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:07,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941242439] [2021-10-13 19:51:07,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941242439] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:07,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:07,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-13 19:51:07,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452658951] [2021-10-13 19:51:07,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:51:07,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:51:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:51:07,759 INFO L87 Difference]: Start difference. First operand 444 states and 2564 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 19:51:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:07,876 INFO L93 Difference]: Finished difference Result 380 states and 2116 transitions. [2021-10-13 19:51:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 19:51:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:07,882 INFO L225 Difference]: With dead ends: 380 [2021-10-13 19:51:07,883 INFO L226 Difference]: Without dead ends: 380 [2021-10-13 19:51:07,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:51:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-13 19:51:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2021-10-13 19:51:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 5.58311345646438) internal successors, (2116), 379 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 2116 transitions. [2021-10-13 19:51:07,907 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 2116 transitions. Word has length 13 [2021-10-13 19:51:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:07,908 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 2116 transitions. [2021-10-13 19:51:07,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 19:51:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 2116 transitions. [2021-10-13 19:51:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 19:51:07,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:07,913 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, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:07,929 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 19:51:08,127 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 19:51:08,127 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash 40296099, now seen corresponding path program 1 times [2021-10-13 19:51:08,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:08,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191969020] [2021-10-13 19:51:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:08,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:08,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:08,131 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 19:51:08,137 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 19:51:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:51:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:09,135 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 19:51:09,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:09,522 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 19:51:09,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:09,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191969020] [2021-10-13 19:51:09,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191969020] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:09,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:09,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:51:09,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7814894] [2021-10-13 19:51:09,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:09,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:09,527 INFO L87 Difference]: Start difference. First operand 380 states and 2116 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:09,589 INFO L93 Difference]: Finished difference Result 757 states and 4229 transitions. [2021-10-13 19:51:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-13 19:51:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:09,600 INFO L225 Difference]: With dead ends: 757 [2021-10-13 19:51:09,601 INFO L226 Difference]: Without dead ends: 744 [2021-10-13 19:51:09,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-13 19:51:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2021-10-13 19:51:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 5.619111709286676) internal successors, (4175), 743 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 4175 transitions. [2021-10-13 19:51:09,638 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 4175 transitions. Word has length 31 [2021-10-13 19:51:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:09,638 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 4175 transitions. [2021-10-13 19:51:09,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 4175 transitions. [2021-10-13 19:51:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:09,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:09,643 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:09,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:09,855 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 19:51:09,856 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 68639436, now seen corresponding path program 1 times [2021-10-13 19:51:09,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:09,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376772606] [2021-10-13 19:51:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:09,859 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:09,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:09,860 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 19:51:09,861 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 19:51:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:10,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:10,268 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 19:51:10,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:10,410 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 19:51:10,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:10,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376772606] [2021-10-13 19:51:10,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376772606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:10,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:10,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 19:51:10,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766032125] [2021-10-13 19:51:10,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:10,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:10,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:10,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:10,414 INFO L87 Difference]: Start difference. First operand 744 states and 4175 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 19:51:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:10,903 INFO L93 Difference]: Finished difference Result 2614 states and 14385 transitions. [2021-10-13 19:51:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:51:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 32 [2021-10-13 19:51:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:10,952 INFO L225 Difference]: With dead ends: 2614 [2021-10-13 19:51:10,952 INFO L226 Difference]: Without dead ends: 2614 [2021-10-13 19:51:10,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:10,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-10-13 19:51:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 1144. [2021-10-13 19:51:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 6.111986001749782) internal successors, (6986), 1143 states have internal predecessors, (6986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 6986 transitions. [2021-10-13 19:51:11,075 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 6986 transitions. Word has length 32 [2021-10-13 19:51:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:11,075 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 6986 transitions. [2021-10-13 19:51:11,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 19:51:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 6986 transitions. [2021-10-13 19:51:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:11,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:11,083 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:11,096 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 19:51:11,296 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 19:51:11,297 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -27679950, now seen corresponding path program 1 times [2021-10-13 19:51:11,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:11,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194794215] [2021-10-13 19:51:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:11,299 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:11,300 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 19:51:11,301 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 19:51:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:11,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:51:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:11,648 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 19:51:11,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:11,739 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 19:51:11,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:11,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194794215] [2021-10-13 19:51:11,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194794215] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:11,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:11,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:51:11,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577555583] [2021-10-13 19:51:11,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:51:11,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:51:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:51:11,742 INFO L87 Difference]: Start difference. First operand 1144 states and 6986 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:12,011 INFO L93 Difference]: Finished difference Result 1672 states and 9313 transitions. [2021-10-13 19:51:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 19:51:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 19:51:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:12,025 INFO L225 Difference]: With dead ends: 1672 [2021-10-13 19:51:12,026 INFO L226 Difference]: Without dead ends: 1666 [2021-10-13 19:51:12,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:51:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-10-13 19:51:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1294. [2021-10-13 19:51:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 5.875483372003093) internal successors, (7597), 1293 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 7597 transitions. [2021-10-13 19:51:12,098 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 7597 transitions. Word has length 32 [2021-10-13 19:51:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:12,099 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 7597 transitions. [2021-10-13 19:51:12,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 7597 transitions. [2021-10-13 19:51:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:12,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:12,110 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:12,126 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 19:51:12,323 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 19:51:12,324 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2018767441, now seen corresponding path program 1 times [2021-10-13 19:51:12,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:12,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469084568] [2021-10-13 19:51:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:12,326 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:12,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:12,327 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 19:51:12,333 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 19:51:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:12,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:12,902 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 19:51:12,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:13,101 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 19:51:13,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:13,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469084568] [2021-10-13 19:51:13,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469084568] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:13,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:13,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 19:51:13,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385748580] [2021-10-13 19:51:13,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:13,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:13,104 INFO L87 Difference]: Start difference. First operand 1294 states and 7597 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:13,721 INFO L93 Difference]: Finished difference Result 5676 states and 34223 transitions. [2021-10-13 19:51:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:51:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 19:51:13,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:13,773 INFO L225 Difference]: With dead ends: 5676 [2021-10-13 19:51:13,773 INFO L226 Difference]: Without dead ends: 5676 [2021-10-13 19:51:13,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-10-13 19:51:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 2590. [2021-10-13 19:51:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 6.6859791425260715) internal successors, (17310), 2589 states have internal predecessors, (17310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 17310 transitions. [2021-10-13 19:51:14,034 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 17310 transitions. Word has length 32 [2021-10-13 19:51:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:14,035 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 17310 transitions. [2021-10-13 19:51:14,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 17310 transitions. [2021-10-13 19:51:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:14,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:14,053 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:14,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:14,269 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 19:51:14,270 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash 686420959, now seen corresponding path program 1 times [2021-10-13 19:51:14,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:14,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379114377] [2021-10-13 19:51:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:14,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:14,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:14,274 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 19:51:14,275 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 19:51:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:51:14,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:14,722 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 19:51:14,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:14,827 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 19:51:14,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:14,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379114377] [2021-10-13 19:51:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379114377] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:14,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:14,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:51:14,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046017157] [2021-10-13 19:51:14,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:51:14,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:51:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:51:14,830 INFO L87 Difference]: Start difference. First operand 2590 states and 17310 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 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 19:51:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:15,180 INFO L93 Difference]: Finished difference Result 5822 states and 39748 transitions. [2021-10-13 19:51:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:51:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 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 32 [2021-10-13 19:51:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:15,241 INFO L225 Difference]: With dead ends: 5822 [2021-10-13 19:51:15,241 INFO L226 Difference]: Without dead ends: 5822 [2021-10-13 19:51:15,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:51:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-10-13 19:51:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 4072. [2021-10-13 19:51:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4071 states have (on average 7.055268975681651) internal successors, (28722), 4071 states have internal predecessors, (28722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 28722 transitions. [2021-10-13 19:51:15,635 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 28722 transitions. Word has length 32 [2021-10-13 19:51:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:15,635 INFO L470 AbstractCegarLoop]: Abstraction has 4072 states and 28722 transitions. [2021-10-13 19:51:15,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 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 19:51:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 28722 transitions. [2021-10-13 19:51:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:15,666 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:15,666 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:15,682 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 19:51:15,882 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 19:51:15,882 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:15,883 INFO L82 PathProgramCache]: Analyzing trace with hash 545824974, now seen corresponding path program 1 times [2021-10-13 19:51:15,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:15,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111961849] [2021-10-13 19:51:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:15,884 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:15,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:15,885 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 19:51:15,889 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 19:51:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:16,535 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 19:51:16,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:16,826 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 19:51:16,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:16,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111961849] [2021-10-13 19:51:16,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111961849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:16,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:16,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 19:51:16,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28081458] [2021-10-13 19:51:16,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:16,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:16,828 INFO L87 Difference]: Start difference. First operand 4072 states and 28722 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:17,509 INFO L93 Difference]: Finished difference Result 11908 states and 82754 transitions. [2021-10-13 19:51:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:51:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 19:51:17,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:17,813 INFO L225 Difference]: With dead ends: 11908 [2021-10-13 19:51:17,813 INFO L226 Difference]: Without dead ends: 11908 [2021-10-13 19:51:17,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11908 states. [2021-10-13 19:51:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11908 to 5796. [2021-10-13 19:51:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 7.414495254529767) internal successors, (42967), 5795 states have internal predecessors, (42967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 42967 transitions. [2021-10-13 19:51:18,534 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 42967 transitions. Word has length 32 [2021-10-13 19:51:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:18,537 INFO L470 AbstractCegarLoop]: Abstraction has 5796 states and 42967 transitions. [2021-10-13 19:51:18,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 42967 transitions. [2021-10-13 19:51:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:18,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:18,708 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:18,746 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 19:51:18,922 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 19:51:18,922 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1507107543, now seen corresponding path program 2 times [2021-10-13 19:51:18,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:18,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287075183] [2021-10-13 19:51:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:18,924 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:18,927 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 19:51:18,937 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 19:51:19,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:19,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:19,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:51:19,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:19,711 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 19:51:19,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:19,821 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 19:51:19,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:19,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287075183] [2021-10-13 19:51:19,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287075183] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:19,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:19,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 19:51:19,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022744053] [2021-10-13 19:51:19,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:51:19,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:51:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:51:19,825 INFO L87 Difference]: Start difference. First operand 5796 states and 42967 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 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 19:51:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:20,153 INFO L93 Difference]: Finished difference Result 8140 states and 56757 transitions. [2021-10-13 19:51:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 19:51:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 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 32 [2021-10-13 19:51:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:20,237 INFO L225 Difference]: With dead ends: 8140 [2021-10-13 19:51:20,237 INFO L226 Difference]: Without dead ends: 8100 [2021-10-13 19:51:20,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:51:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2021-10-13 19:51:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 6444. [2021-10-13 19:51:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6444 states, 6443 states have (on average 7.2731646748409124) internal successors, (46861), 6443 states have internal predecessors, (46861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6444 states to 6444 states and 46861 transitions. [2021-10-13 19:51:20,786 INFO L78 Accepts]: Start accepts. Automaton has 6444 states and 46861 transitions. Word has length 32 [2021-10-13 19:51:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:20,786 INFO L470 AbstractCegarLoop]: Abstraction has 6444 states and 46861 transitions. [2021-10-13 19:51:20,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 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 19:51:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 6444 states and 46861 transitions. [2021-10-13 19:51:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:20,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:20,826 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:20,844 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 19:51:21,041 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 19:51:21,041 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1979610523, now seen corresponding path program 1 times [2021-10-13 19:51:21,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:21,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711463135] [2021-10-13 19:51:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:21,044 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:21,046 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 19:51:21,149 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 19:51:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:21,711 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 19:51:21,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:21,979 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 19:51:21,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:21,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711463135] [2021-10-13 19:51:21,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711463135] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 19:51:21,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:51:21,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-13 19:51:21,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775575546] [2021-10-13 19:51:21,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:21,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:51:21,984 INFO L87 Difference]: Start difference. First operand 6444 states and 46861 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:22,207 INFO L93 Difference]: Finished difference Result 8248 states and 56333 transitions. [2021-10-13 19:51:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:51:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 19:51:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:22,312 INFO L225 Difference]: With dead ends: 8248 [2021-10-13 19:51:22,313 INFO L226 Difference]: Without dead ends: 8158 [2021-10-13 19:51:22,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8158 states. [2021-10-13 19:51:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8158 to 7538. [2021-10-13 19:51:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 7.0439166777232325) internal successors, (53090), 7537 states have internal predecessors, (53090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 53090 transitions. [2021-10-13 19:51:22,776 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 53090 transitions. Word has length 32 [2021-10-13 19:51:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:22,779 INFO L470 AbstractCegarLoop]: Abstraction has 7538 states and 53090 transitions. [2021-10-13 19:51:22,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 53090 transitions. [2021-10-13 19:51:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:22,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:22,987 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:23,008 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 19:51:23,201 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 19:51:23,201 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1278377847, now seen corresponding path program 2 times [2021-10-13 19:51:23,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:23,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550277437] [2021-10-13 19:51:23,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:23,204 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:23,205 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 19:51:23,206 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 19:51:23,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:23,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:23,833 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 19:51:23,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:24,215 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 19:51:24,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:24,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550277437] [2021-10-13 19:51:24,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550277437] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:24,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:24,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 19:51:24,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535743505] [2021-10-13 19:51:24,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:24,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:24,218 INFO L87 Difference]: Start difference. First operand 7538 states and 53090 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 19:51:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:25,016 INFO L93 Difference]: Finished difference Result 17446 states and 116270 transitions. [2021-10-13 19:51:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:51:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 32 [2021-10-13 19:51:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:25,253 INFO L225 Difference]: With dead ends: 17446 [2021-10-13 19:51:25,253 INFO L226 Difference]: Without dead ends: 17446 [2021-10-13 19:51:25,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17446 states. [2021-10-13 19:51:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17446 to 10518. [2021-10-13 19:51:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10518 states, 10517 states have (on average 7.257773129219359) internal successors, (76330), 10517 states have internal predecessors, (76330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10518 states to 10518 states and 76330 transitions. [2021-10-13 19:51:26,228 INFO L78 Accepts]: Start accepts. Automaton has 10518 states and 76330 transitions. Word has length 32 [2021-10-13 19:51:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:26,230 INFO L470 AbstractCegarLoop]: Abstraction has 10518 states and 76330 transitions. [2021-10-13 19:51:26,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 19:51:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 10518 states and 76330 transitions. [2021-10-13 19:51:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 19:51:26,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:26,276 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:26,287 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 19:51:26,477 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 19:51:26,477 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash -606674130, now seen corresponding path program 2 times [2021-10-13 19:51:26,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:26,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943548361] [2021-10-13 19:51:26,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:26,480 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:26,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:26,481 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 19:51:26,493 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 19:51:26,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:26,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:26,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:27,033 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 19:51:27,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:27,178 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 19:51:27,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:27,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943548361] [2021-10-13 19:51:27,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943548361] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:27,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:27,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 19:51:27,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428217616] [2021-10-13 19:51:27,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:27,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:27,180 INFO L87 Difference]: Start difference. First operand 10518 states and 76330 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 19:51:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:28,110 INFO L93 Difference]: Finished difference Result 26884 states and 183800 transitions. [2021-10-13 19:51:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:51:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 32 [2021-10-13 19:51:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:28,526 INFO L225 Difference]: With dead ends: 26884 [2021-10-13 19:51:28,527 INFO L226 Difference]: Without dead ends: 26884 [2021-10-13 19:51:28,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26884 states. [2021-10-13 19:51:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26884 to 13808. [2021-10-13 19:51:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 13807 states have (on average 7.460708336351126) internal successors, (103010), 13807 states have internal predecessors, (103010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 103010 transitions. [2021-10-13 19:51:29,672 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 103010 transitions. Word has length 32 [2021-10-13 19:51:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:29,673 INFO L470 AbstractCegarLoop]: Abstraction has 13808 states and 103010 transitions. [2021-10-13 19:51:29,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 19:51:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 103010 transitions. [2021-10-13 19:51:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 19:51:29,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:29,733 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:29,744 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 19:51:29,933 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 19:51:29,934 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 850963497, now seen corresponding path program 1 times [2021-10-13 19:51:29,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:29,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228276338] [2021-10-13 19:51:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:29,936 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:29,937 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 19:51:29,938 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 19:51:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:51:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:31,719 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 19:51:31,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:32,202 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 19:51:32,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:32,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228276338] [2021-10-13 19:51:32,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228276338] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:32,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:32,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:51:32,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279292629] [2021-10-13 19:51:32,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:32,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:32,205 INFO L87 Difference]: Start difference. First operand 13808 states and 103010 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:33,027 INFO L93 Difference]: Finished difference Result 15116 states and 109183 transitions. [2021-10-13 19:51:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:33,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 19:51:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:33,274 INFO L225 Difference]: With dead ends: 15116 [2021-10-13 19:51:33,274 INFO L226 Difference]: Without dead ends: 14950 [2021-10-13 19:51:33,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14950 states. [2021-10-13 19:51:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14950 to 14272. [2021-10-13 19:51:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 7.410622941629879) internal successors, (105757), 14271 states have internal predecessors, (105757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 105757 transitions. [2021-10-13 19:51:33,991 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 105757 transitions. Word has length 33 [2021-10-13 19:51:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:33,991 INFO L470 AbstractCegarLoop]: Abstraction has 14272 states and 105757 transitions. [2021-10-13 19:51:33,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 105757 transitions. [2021-10-13 19:51:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 19:51:34,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:34,052 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:34,062 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 19:51:34,253 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 19:51:34,254 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1721817073, now seen corresponding path program 1 times [2021-10-13 19:51:34,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:34,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964272111] [2021-10-13 19:51:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:34,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:34,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:34,258 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 19:51:34,268 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 19:51:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:51:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:35,758 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 19:51:35,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:36,207 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 19:51:36,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964272111] [2021-10-13 19:51:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964272111] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:36,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:36,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:51:36,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504943152] [2021-10-13 19:51:36,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:36,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:36,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:36,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:36,210 INFO L87 Difference]: Start difference. First operand 14272 states and 105757 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:36,695 INFO L93 Difference]: Finished difference Result 15612 states and 112115 transitions. [2021-10-13 19:51:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 19:51:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:36,956 INFO L225 Difference]: With dead ends: 15612 [2021-10-13 19:51:36,956 INFO L226 Difference]: Without dead ends: 15494 [2021-10-13 19:51:36,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15494 states. [2021-10-13 19:51:37,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15494 to 14858. [2021-10-13 19:51:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 7.347647573534361) internal successors, (109164), 14857 states have internal predecessors, (109164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 109164 transitions. [2021-10-13 19:51:37,757 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 109164 transitions. Word has length 33 [2021-10-13 19:51:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:37,757 INFO L470 AbstractCegarLoop]: Abstraction has 14858 states and 109164 transitions. [2021-10-13 19:51:37,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 109164 transitions. [2021-10-13 19:51:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 19:51:37,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:37,819 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:37,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 19:51:38,032 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 19:51:38,033 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:38,034 INFO L82 PathProgramCache]: Analyzing trace with hash -899140846, now seen corresponding path program 1 times [2021-10-13 19:51:38,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:38,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503648916] [2021-10-13 19:51:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:38,035 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:38,036 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 19:51:38,037 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 19:51:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:38,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:51:38,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:39,337 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 19:51:39,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:40,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:40,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503648916] [2021-10-13 19:51:40,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503648916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:40,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:40,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:51:40,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742251035] [2021-10-13 19:51:40,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:40,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:40,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:40,013 INFO L87 Difference]: Start difference. First operand 14858 states and 109164 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:40,530 INFO L93 Difference]: Finished difference Result 15860 states and 114037 transitions. [2021-10-13 19:51:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:40,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 19:51:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:40,684 INFO L225 Difference]: With dead ends: 15860 [2021-10-13 19:51:40,684 INFO L226 Difference]: Without dead ends: 15770 [2021-10-13 19:51:40,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15770 states. [2021-10-13 19:51:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15770 to 15340. [2021-10-13 19:51:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15340 states, 15339 states have (on average 7.289262663798161) internal successors, (111810), 15339 states have internal predecessors, (111810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15340 states to 15340 states and 111810 transitions. [2021-10-13 19:51:41,769 INFO L78 Accepts]: Start accepts. Automaton has 15340 states and 111810 transitions. Word has length 33 [2021-10-13 19:51:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:41,769 INFO L470 AbstractCegarLoop]: Abstraction has 15340 states and 111810 transitions. [2021-10-13 19:51:41,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15340 states and 111810 transitions. [2021-10-13 19:51:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 19:51:41,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:41,860 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:41,872 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 19:51:42,068 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 19:51:42,069 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:42,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:42,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1064147448, now seen corresponding path program 2 times [2021-10-13 19:51:42,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:42,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026265645] [2021-10-13 19:51:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:42,072 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:42,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:42,073 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 19:51:42,080 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 19:51:42,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:51:42,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:43,714 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 19:51:43,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:44,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:44,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026265645] [2021-10-13 19:51:44,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026265645] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:44,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:44,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:51:44,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190774806] [2021-10-13 19:51:44,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:44,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:44,251 INFO L87 Difference]: Start difference. First operand 15340 states and 111810 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:47,229 INFO L93 Difference]: Finished difference Result 16276 states and 116313 transitions. [2021-10-13 19:51:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:47,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 19:51:47,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:47,323 INFO L225 Difference]: With dead ends: 16276 [2021-10-13 19:51:47,323 INFO L226 Difference]: Without dead ends: 16186 [2021-10-13 19:51:47,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16186 states. [2021-10-13 19:51:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16186 to 15702. [2021-10-13 19:51:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15702 states, 15701 states have (on average 7.25501560410165) internal successors, (113911), 15701 states have internal predecessors, (113911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 113911 transitions. [2021-10-13 19:51:48,054 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 113911 transitions. Word has length 33 [2021-10-13 19:51:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:48,054 INFO L470 AbstractCegarLoop]: Abstraction has 15702 states and 113911 transitions. [2021-10-13 19:51:48,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 113911 transitions. [2021-10-13 19:51:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 19:51:48,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:48,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:48,146 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 19:51:48,342 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 19:51:48,343 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1122383815, now seen corresponding path program 2 times [2021-10-13 19:51:48,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:48,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652794765] [2021-10-13 19:51:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:48,345 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:48,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:48,347 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 19:51:48,349 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 19:51:48,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:48,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:51:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:50,071 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 19:51:50,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:50,539 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 19:51:50,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:50,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652794765] [2021-10-13 19:51:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652794765] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:50,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:50,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:51:50,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963047430] [2021-10-13 19:51:50,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:50,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:50,541 INFO L87 Difference]: Start difference. First operand 15702 states and 113911 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:51,043 INFO L93 Difference]: Finished difference Result 16944 states and 119922 transitions. [2021-10-13 19:51:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:51,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 19:51:51,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:51,138 INFO L225 Difference]: With dead ends: 16944 [2021-10-13 19:51:51,139 INFO L226 Difference]: Without dead ends: 16826 [2021-10-13 19:51:51,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16826 states. [2021-10-13 19:51:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16826 to 16136. [2021-10-13 19:51:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16136 states, 16135 states have (on average 7.219584753641152) internal successors, (116488), 16135 states have internal predecessors, (116488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 116488 transitions. [2021-10-13 19:51:52,295 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 116488 transitions. Word has length 33 [2021-10-13 19:51:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:52,295 INFO L470 AbstractCegarLoop]: Abstraction has 16136 states and 116488 transitions. [2021-10-13 19:51:52,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 116488 transitions. [2021-10-13 19:51:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 19:51:52,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:52,355 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:52,367 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 19:51:52,555 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 19:51:52,556 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:52,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1784402153, now seen corresponding path program 2 times [2021-10-13 19:51:52,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:52,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738999414] [2021-10-13 19:51:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:51:52,559 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:52,560 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 19:51:52,561 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 19:51:53,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:51:53,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:51:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:54,232 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 19:51:54,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:54,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:54,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738999414] [2021-10-13 19:51:54,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738999414] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:54,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:54,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:51:54,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714991126] [2021-10-13 19:51:54,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:54,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:54,680 INFO L87 Difference]: Start difference. First operand 16136 states and 116488 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:55,409 INFO L93 Difference]: Finished difference Result 17378 states and 122339 transitions. [2021-10-13 19:51:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:55,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 19:51:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:55,511 INFO L225 Difference]: With dead ends: 17378 [2021-10-13 19:51:55,511 INFO L226 Difference]: Without dead ends: 17212 [2021-10-13 19:51:55,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17212 states. [2021-10-13 19:51:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17212 to 16444. [2021-10-13 19:51:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16444 states, 16443 states have (on average 7.194854953475643) internal successors, (118305), 16443 states have internal predecessors, (118305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16444 states to 16444 states and 118305 transitions. [2021-10-13 19:51:56,223 INFO L78 Accepts]: Start accepts. Automaton has 16444 states and 118305 transitions. Word has length 33 [2021-10-13 19:51:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:56,223 INFO L470 AbstractCegarLoop]: Abstraction has 16444 states and 118305 transitions. [2021-10-13 19:51:56,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 16444 states and 118305 transitions. [2021-10-13 19:51:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:51:56,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:56,283 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:56,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-13 19:51:56,484 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 19:51:56,484 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1975860718, now seen corresponding path program 3 times [2021-10-13 19:51:56,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:56,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903771624] [2021-10-13 19:51:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:51:56,487 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:56,488 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 19:51:56,489 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 19:51:57,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:51:57,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:51:57,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:51:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:57,774 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 19:51:57,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:58,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:58,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903771624] [2021-10-13 19:51:58,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903771624] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:58,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:58,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 19:51:58,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312270425] [2021-10-13 19:51:58,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:51:58,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:58,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:51:58,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:51:58,041 INFO L87 Difference]: Start difference. First operand 16444 states and 118305 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 19:52:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:00,282 INFO L93 Difference]: Finished difference Result 43742 states and 297049 transitions. [2021-10-13 19:52:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 19:52:00,283 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 34 [2021-10-13 19:52:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:00,630 INFO L225 Difference]: With dead ends: 43742 [2021-10-13 19:52:00,630 INFO L226 Difference]: Without dead ends: 43742 [2021-10-13 19:52:00,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 588.6ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:52:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43742 states. [2021-10-13 19:52:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43742 to 21920. [2021-10-13 19:52:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21920 states, 21919 states have (on average 7.351567133537114) internal successors, (161139), 21919 states have internal predecessors, (161139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21920 states to 21920 states and 161139 transitions. [2021-10-13 19:52:02,331 INFO L78 Accepts]: Start accepts. Automaton has 21920 states and 161139 transitions. Word has length 34 [2021-10-13 19:52:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:02,331 INFO L470 AbstractCegarLoop]: Abstraction has 21920 states and 161139 transitions. [2021-10-13 19:52:02,332 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 19:52:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 21920 states and 161139 transitions. [2021-10-13 19:52:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:52:02,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:02,419 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:02,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:02,620 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 19:52:02,620 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash -666794388, now seen corresponding path program 4 times [2021-10-13 19:52:02,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:02,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448926455] [2021-10-13 19:52:02,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:52:02,622 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:02,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:02,624 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 19:52:02,625 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 19:52:03,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:52:03,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:03,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:52:03,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:03,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:03,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:03,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448926455] [2021-10-13 19:52:03,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448926455] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:03,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:03,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:52:03,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208435402] [2021-10-13 19:52:03,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:52:03,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:52:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:52:03,911 INFO L87 Difference]: Start difference. First operand 21920 states and 161139 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 19:52:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:38,041 INFO L93 Difference]: Finished difference Result 40288 states and 271004 transitions. [2021-10-13 19:52:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:52:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 34 [2021-10-13 19:52:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:38,384 INFO L225 Difference]: With dead ends: 40288 [2021-10-13 19:52:38,384 INFO L226 Difference]: Without dead ends: 40120 [2021-10-13 19:52:38,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 4393.3ms TimeCoverageRelationStatistics Valid=78, Invalid=262, Unknown=2, NotChecked=0, Total=342 [2021-10-13 19:52:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40120 states. [2021-10-13 19:52:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40120 to 23180. [2021-10-13 19:52:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23180 states, 23179 states have (on average 7.303334915224988) internal successors, (169284), 23179 states have internal predecessors, (169284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23180 states to 23180 states and 169284 transitions. [2021-10-13 19:52:40,085 INFO L78 Accepts]: Start accepts. Automaton has 23180 states and 169284 transitions. Word has length 34 [2021-10-13 19:52:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 23180 states and 169284 transitions. [2021-10-13 19:52:40,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 19:52:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 23180 states and 169284 transitions. [2021-10-13 19:52:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:52:40,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:40,244 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:40,260 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 19:52:40,459 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 19:52:40,459 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:40,461 INFO L82 PathProgramCache]: Analyzing trace with hash 818766358, now seen corresponding path program 5 times [2021-10-13 19:52:40,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:40,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384850265] [2021-10-13 19:52:40,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:52:40,462 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:40,463 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 19:52:40,464 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 19:52:41,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:52:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:52:41,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:41,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:41,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:41,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384850265] [2021-10-13 19:52:41,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384850265] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:41,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:41,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:52:41,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776056320] [2021-10-13 19:52:41,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:52:41,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:41,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:52:41,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:52:41,505 INFO L87 Difference]: Start difference. First operand 23180 states and 169284 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 19:52:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:46,665 INFO L93 Difference]: Finished difference Result 49645 states and 333188 transitions. [2021-10-13 19:52:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:52:46,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 34 [2021-10-13 19:52:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:47,436 INFO L225 Difference]: With dead ends: 49645 [2021-10-13 19:52:47,436 INFO L226 Difference]: Without dead ends: 49645 [2021-10-13 19:52:47,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:52:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-10-13 19:52:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 22222. [2021-10-13 19:52:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22222 states, 22221 states have (on average 7.250483776607713) internal successors, (161113), 22221 states have internal predecessors, (161113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22222 states to 22222 states and 161113 transitions. [2021-10-13 19:52:49,264 INFO L78 Accepts]: Start accepts. Automaton has 22222 states and 161113 transitions. Word has length 34 [2021-10-13 19:52:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:49,265 INFO L470 AbstractCegarLoop]: Abstraction has 22222 states and 161113 transitions. [2021-10-13 19:52:49,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 19:52:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 22222 states and 161113 transitions. [2021-10-13 19:52:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:52:49,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:49,397 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:49,413 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 19:52:49,610 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 19:52:49,611 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:49,611 INFO L82 PathProgramCache]: Analyzing trace with hash -823239486, now seen corresponding path program 6 times [2021-10-13 19:52:49,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:49,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411682404] [2021-10-13 19:52:49,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:52:49,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:49,615 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 19:52:49,616 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 19:52:50,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:52:50,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:52:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:50,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:51,019 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 19:52:51,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:51,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411682404] [2021-10-13 19:52:51,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411682404] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:51,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:51,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:52:51,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754764965] [2021-10-13 19:52:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:52:51,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:52:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:52:51,023 INFO L87 Difference]: Start difference. First operand 22222 states and 161113 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 19:52:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:55,292 INFO L93 Difference]: Finished difference Result 76668 states and 514547 transitions. [2021-10-13 19:52:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:52:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 34 [2021-10-13 19:52:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:56,007 INFO L225 Difference]: With dead ends: 76668 [2021-10-13 19:52:56,007 INFO L226 Difference]: Without dead ends: 76668 [2021-10-13 19:52:56,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1228.3ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:52:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76668 states. [2021-10-13 19:52:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76668 to 26170. [2021-10-13 19:52:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26170 states, 26169 states have (on average 7.480645038022087) internal successors, (195761), 26169 states have internal predecessors, (195761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26170 states to 26170 states and 195761 transitions. [2021-10-13 19:52:58,780 INFO L78 Accepts]: Start accepts. Automaton has 26170 states and 195761 transitions. Word has length 34 [2021-10-13 19:52:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:58,780 INFO L470 AbstractCegarLoop]: Abstraction has 26170 states and 195761 transitions. [2021-10-13 19:52:58,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 19:52:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26170 states and 195761 transitions. [2021-10-13 19:52:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:52:58,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:58,893 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:58,905 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 19:52:59,093 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 19:52:59,094 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:59,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:59,095 INFO L82 PathProgramCache]: Analyzing trace with hash 996956340, now seen corresponding path program 7 times [2021-10-13 19:52:59,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:59,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667757550] [2021-10-13 19:52:59,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:52:59,097 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:59,098 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 19:52:59,099 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 19:52:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:52:59,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:52:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:59,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:00,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:00,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667757550] [2021-10-13 19:53:00,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667757550] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:00,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:00,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:53:00,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682122974] [2021-10-13 19:53:00,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:53:00,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:53:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:53:00,130 INFO L87 Difference]: Start difference. First operand 26170 states and 195761 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 19:53:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:10,681 INFO L93 Difference]: Finished difference Result 41406 states and 287058 transitions. [2021-10-13 19:53:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:53:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 34 [2021-10-13 19:53:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:11,400 INFO L225 Difference]: With dead ends: 41406 [2021-10-13 19:53:11,400 INFO L226 Difference]: Without dead ends: 41298 [2021-10-13 19:53:11,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2725.3ms TimeCoverageRelationStatistics Valid=53, Invalid=128, Unknown=1, NotChecked=0, Total=182 [2021-10-13 19:53:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41298 states. [2021-10-13 19:53:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41298 to 26292. [2021-10-13 19:53:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26292 states, 26291 states have (on average 7.472024647217679) internal successors, (196447), 26291 states have internal predecessors, (196447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26292 states to 26292 states and 196447 transitions. [2021-10-13 19:53:13,510 INFO L78 Accepts]: Start accepts. Automaton has 26292 states and 196447 transitions. Word has length 34 [2021-10-13 19:53:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:13,511 INFO L470 AbstractCegarLoop]: Abstraction has 26292 states and 196447 transitions. [2021-10-13 19:53:13,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 19:53:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 26292 states and 196447 transitions. [2021-10-13 19:53:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:53:13,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:13,618 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:13,629 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 19:53:13,818 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 19:53:13,819 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:53:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash -501955557, now seen corresponding path program 3 times [2021-10-13 19:53:13,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:13,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398467036] [2021-10-13 19:53:13,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:53:13,822 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:13,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:13,823 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 19:53:13,824 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 19:53:14,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:53:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:53:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:15,251 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 19:53:15,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:16,011 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 19:53:16,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:16,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398467036] [2021-10-13 19:53:16,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398467036] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:16,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:16,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 19:53:16,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19780510] [2021-10-13 19:53:16,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:53:16,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:16,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:53:16,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:53:16,013 INFO L87 Difference]: Start difference. First operand 26292 states and 196447 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:19,792 INFO L93 Difference]: Finished difference Result 58242 states and 414140 transitions. [2021-10-13 19:53:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:53:19,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:53:19,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:20,379 INFO L225 Difference]: With dead ends: 58242 [2021-10-13 19:53:20,379 INFO L226 Difference]: Without dead ends: 58242 [2021-10-13 19:53:20,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1687.7ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:53:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58242 states. [2021-10-13 19:53:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58242 to 39886. [2021-10-13 19:53:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39886 states, 39885 states have (on average 7.495549705403033) internal successors, (298960), 39885 states have internal predecessors, (298960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39886 states to 39886 states and 298960 transitions. [2021-10-13 19:53:23,827 INFO L78 Accepts]: Start accepts. Automaton has 39886 states and 298960 transitions. Word has length 34 [2021-10-13 19:53:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:23,828 INFO L470 AbstractCegarLoop]: Abstraction has 39886 states and 298960 transitions. [2021-10-13 19:53:23,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 39886 states and 298960 transitions. [2021-10-13 19:53:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:53:24,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:24,159 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:24,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-13 19:53:24,373 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 19:53:24,373 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:53:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:24,374 INFO L82 PathProgramCache]: Analyzing trace with hash 343488029, now seen corresponding path program 4 times [2021-10-13 19:53:24,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:24,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721111889] [2021-10-13 19:53:24,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:53:24,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:24,377 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 19:53:24,414 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 19:53:25,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:53:25,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:25,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:53:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:25,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:25,915 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 19:53:25,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721111889] [2021-10-13 19:53:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721111889] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:25,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:25,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:53:25,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568926341] [2021-10-13 19:53:25,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:53:25,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:53:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:53:25,923 INFO L87 Difference]: Start difference. First operand 39886 states and 298960 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:33,020 INFO L93 Difference]: Finished difference Result 59474 states and 417456 transitions. [2021-10-13 19:53:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 19:53:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:53:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:33,715 INFO L225 Difference]: With dead ends: 59474 [2021-10-13 19:53:33,715 INFO L226 Difference]: Without dead ends: 59378 [2021-10-13 19:53:33,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:53:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59378 states. [2021-10-13 19:53:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59378 to 41476. [2021-10-13 19:53:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41476 states, 41475 states have (on average 7.436262808921037) internal successors, (308419), 41475 states have internal predecessors, (308419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41476 states to 41476 states and 308419 transitions. [2021-10-13 19:53:36,993 INFO L78 Accepts]: Start accepts. Automaton has 41476 states and 308419 transitions. Word has length 34 [2021-10-13 19:53:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:36,993 INFO L470 AbstractCegarLoop]: Abstraction has 41476 states and 308419 transitions. [2021-10-13 19:53:36,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 41476 states and 308419 transitions. [2021-10-13 19:53:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:53:37,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:37,193 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:37,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:37,393 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 19:53:37,394 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:53:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1952721965, now seen corresponding path program 5 times [2021-10-13 19:53:37,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:37,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218716858] [2021-10-13 19:53:37,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:53:37,395 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:37,397 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 19:53:37,398 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 19:53:38,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:53:38,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:38,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:53:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:38,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:53:38,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:38,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218716858] [2021-10-13 19:53:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218716858] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:38,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:38,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:53:38,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415690374] [2021-10-13 19:53:38,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:53:38,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:53:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:53:38,720 INFO L87 Difference]: Start difference. First operand 41476 states and 308419 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:03,817 INFO L93 Difference]: Finished difference Result 63594 states and 443866 transitions. [2021-10-13 19:54:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:54:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:54:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:04,465 INFO L225 Difference]: With dead ends: 63594 [2021-10-13 19:54:04,465 INFO L226 Difference]: Without dead ends: 63462 [2021-10-13 19:54:04,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2402.7ms TimeCoverageRelationStatistics Valid=64, Invalid=175, Unknown=1, NotChecked=0, Total=240 [2021-10-13 19:54:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63462 states. [2021-10-13 19:54:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63462 to 43030. [2021-10-13 19:54:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43030 states, 43029 states have (on average 7.481140626089382) internal successors, (321906), 43029 states have internal predecessors, (321906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43030 states to 43030 states and 321906 transitions. [2021-10-13 19:54:07,580 INFO L78 Accepts]: Start accepts. Automaton has 43030 states and 321906 transitions. Word has length 34 [2021-10-13 19:54:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:07,580 INFO L470 AbstractCegarLoop]: Abstraction has 43030 states and 321906 transitions. [2021-10-13 19:54:07,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 43030 states and 321906 transitions. [2021-10-13 19:54:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:54:08,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:08,444 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:08,464 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 19:54:08,659 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 19:54:08,659 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:54:08,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:08,660 INFO L82 PathProgramCache]: Analyzing trace with hash 704672875, now seen corresponding path program 6 times [2021-10-13 19:54:08,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:08,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303773056] [2021-10-13 19:54:08,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:54:08,661 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:08,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:08,666 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 19:54:08,671 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 19:54:09,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:54:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:54:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:10,298 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 19:54:10,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:10,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303773056] [2021-10-13 19:54:10,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303773056] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:10,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:10,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:54:10,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597114921] [2021-10-13 19:54:10,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:54:10,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:10,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:54:10,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:54:10,300 INFO L87 Difference]: Start difference. First operand 43030 states and 321906 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:15,152 INFO L93 Difference]: Finished difference Result 77030 states and 543951 transitions. [2021-10-13 19:54:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:54:15,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:54:15,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:16,083 INFO L225 Difference]: With dead ends: 77030 [2021-10-13 19:54:16,083 INFO L226 Difference]: Without dead ends: 77030 [2021-10-13 19:54:16,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:54:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77030 states. [2021-10-13 19:54:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77030 to 45690. [2021-10-13 19:54:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45690 states, 45689 states have (on average 7.517454967278776) internal successors, (343465), 45689 states have internal predecessors, (343465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45690 states to 45690 states and 343465 transitions. [2021-10-13 19:54:20,518 INFO L78 Accepts]: Start accepts. Automaton has 45690 states and 343465 transitions. Word has length 34 [2021-10-13 19:54:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:20,519 INFO L470 AbstractCegarLoop]: Abstraction has 45690 states and 343465 transitions. [2021-10-13 19:54:20,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 45690 states and 343465 transitions. [2021-10-13 19:54:20,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:54:20,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:20,744 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:20,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-10-13 19:54:20,944 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 19:54:20,945 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:54:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1551558990, now seen corresponding path program 3 times [2021-10-13 19:54:20,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:20,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234274654] [2021-10-13 19:54:20,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:54:20,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:20,948 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 19:54:20,949 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 19:54:21,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:54:21,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:54:21,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:22,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:22,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:22,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234274654] [2021-10-13 19:54:22,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234274654] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:22,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:22,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:54:22,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336340145] [2021-10-13 19:54:22,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:54:22,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:54:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:54:22,389 INFO L87 Difference]: Start difference. First operand 45690 states and 343465 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:27,825 INFO L93 Difference]: Finished difference Result 93734 states and 693421 transitions. [2021-10-13 19:54:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:54:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:54:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:29,507 INFO L225 Difference]: With dead ends: 93734 [2021-10-13 19:54:29,507 INFO L226 Difference]: Without dead ends: 93734 [2021-10-13 19:54:29,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:54:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93734 states. [2021-10-13 19:54:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93734 to 65620. [2021-10-13 19:54:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65620 states, 65619 states have (on average 7.758179795486064) internal successors, (509084), 65619 states have internal predecessors, (509084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65620 states to 65620 states and 509084 transitions. [2021-10-13 19:54:35,912 INFO L78 Accepts]: Start accepts. Automaton has 65620 states and 509084 transitions. Word has length 34 [2021-10-13 19:54:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:35,912 INFO L470 AbstractCegarLoop]: Abstraction has 65620 states and 509084 transitions. [2021-10-13 19:54:35,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 65620 states and 509084 transitions. [2021-10-13 19:54:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:54:36,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:36,322 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:36,337 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 19:54:36,528 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 19:54:36,528 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:54:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash -780120012, now seen corresponding path program 4 times [2021-10-13 19:54:36,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:36,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290480307] [2021-10-13 19:54:36,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:54:36,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:36,532 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 19:54:36,563 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 19:54:37,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:54:37,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:37,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:54:37,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:37,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:54:37,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:37,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290480307] [2021-10-13 19:54:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290480307] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:37,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:37,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:54:37,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809972918] [2021-10-13 19:54:37,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:54:37,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:54:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:54:37,782 INFO L87 Difference]: Start difference. First operand 65620 states and 509084 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:43,551 INFO L93 Difference]: Finished difference Result 112622 states and 820390 transitions. [2021-10-13 19:54:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:54:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:54:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:45,509 INFO L225 Difference]: With dead ends: 112622 [2021-10-13 19:54:45,509 INFO L226 Difference]: Without dead ends: 112622 [2021-10-13 19:54:45,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 403.2ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:54:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112622 states. [2021-10-13 19:54:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112622 to 63470. [2021-10-13 19:54:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63470 states, 63469 states have (on average 7.724400888622792) internal successors, (490260), 63469 states have internal predecessors, (490260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63470 states to 63470 states and 490260 transitions. [2021-10-13 19:54:53,005 INFO L78 Accepts]: Start accepts. Automaton has 63470 states and 490260 transitions. Word has length 34 [2021-10-13 19:54:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:53,006 INFO L470 AbstractCegarLoop]: Abstraction has 63470 states and 490260 transitions. [2021-10-13 19:54:53,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 63470 states and 490260 transitions. [2021-10-13 19:54:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:54:53,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:53,589 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:53,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-10-13 19:54:53,802 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 19:54:53,802 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:54:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1488050751, now seen corresponding path program 5 times [2021-10-13 19:54:53,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:53,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119088978] [2021-10-13 19:54:53,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:54:53,804 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:53,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:53,805 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 19:54:53,840 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 19:54:55,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:54:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:54:55,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:56,021 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 19:54:56,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:56,336 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 19:54:56,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:56,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119088978] [2021-10-13 19:54:56,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119088978] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:56,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:56,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:54:56,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370600082] [2021-10-13 19:54:56,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:54:56,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:56,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:54:56,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:54:56,339 INFO L87 Difference]: Start difference. First operand 63470 states and 490260 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:55:02,118 INFO L93 Difference]: Finished difference Result 110237 states and 805099 transitions. [2021-10-13 19:55:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:55:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:55:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:55:04,091 INFO L225 Difference]: With dead ends: 110237 [2021-10-13 19:55:04,091 INFO L226 Difference]: Without dead ends: 110237 [2021-10-13 19:55:04,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:55:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110237 states. [2021-10-13 19:55:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110237 to 63470. [2021-10-13 19:55:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63470 states, 63469 states have (on average 7.724400888622792) internal successors, (490260), 63469 states have internal predecessors, (490260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63470 states to 63470 states and 490260 transitions. [2021-10-13 19:55:10,477 INFO L78 Accepts]: Start accepts. Automaton has 63470 states and 490260 transitions. Word has length 34 [2021-10-13 19:55:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:55:10,478 INFO L470 AbstractCegarLoop]: Abstraction has 63470 states and 490260 transitions. [2021-10-13 19:55:10,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 63470 states and 490260 transitions. [2021-10-13 19:55:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:55:11,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:55:11,419 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:55:11,436 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 19:55:11,633 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 19:55:11,633 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:55:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:55:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1845633976, now seen corresponding path program 6 times [2021-10-13 19:55:11,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:55:11,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482158501] [2021-10-13 19:55:11,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:55:11,635 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:55:11,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:55:11,637 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 19:55:11,670 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 19:55:12,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:55:12,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:55:12,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:55:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:55:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:13,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:13,757 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 19:55:13,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:13,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482158501] [2021-10-13 19:55:13,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482158501] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:13,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:13,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:55:13,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071167268] [2021-10-13 19:55:13,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:55:13,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:55:13,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:55:13,760 INFO L87 Difference]: Start difference. First operand 63470 states and 490260 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:55:18,582 INFO L93 Difference]: Finished difference Result 105582 states and 779388 transitions. [2021-10-13 19:55:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:55:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:55:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:55:20,461 INFO L225 Difference]: With dead ends: 105582 [2021-10-13 19:55:20,462 INFO L226 Difference]: Without dead ends: 105496 [2021-10-13 19:55:20,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:55:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105496 states. [2021-10-13 19:55:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105496 to 72756. [2021-10-13 19:55:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72756 states, 72755 states have (on average 7.734396261425331) internal successors, (562716), 72755 states have internal predecessors, (562716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72756 states to 72756 states and 562716 transitions. [2021-10-13 19:55:27,562 INFO L78 Accepts]: Start accepts. Automaton has 72756 states and 562716 transitions. Word has length 34 [2021-10-13 19:55:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:55:27,562 INFO L470 AbstractCegarLoop]: Abstraction has 72756 states and 562716 transitions. [2021-10-13 19:55:27,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 72756 states and 562716 transitions. [2021-10-13 19:55:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:55:27,964 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:55:27,964 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:55:27,977 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 19:55:28,165 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 19:55:28,165 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:55:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:55:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1488316451, now seen corresponding path program 7 times [2021-10-13 19:55:28,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:55:28,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887907529] [2021-10-13 19:55:28,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:55:28,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:55:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:55:28,169 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 19:55:28,170 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 19:55:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:55:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:55:29,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:55:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:29,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:29,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:29,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887907529] [2021-10-13 19:55:29,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887907529] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:29,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:29,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:55:29,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389922284] [2021-10-13 19:55:29,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:55:29,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:55:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:55:29,923 INFO L87 Difference]: Start difference. First operand 72756 states and 562716 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:55:42,031 INFO L93 Difference]: Finished difference Result 98466 states and 719521 transitions. [2021-10-13 19:55:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:55:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:55:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:55:43,183 INFO L225 Difference]: With dead ends: 98466 [2021-10-13 19:55:43,183 INFO L226 Difference]: Without dead ends: 98272 [2021-10-13 19:55:43,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:55:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98272 states. [2021-10-13 19:55:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98272 to 75090. [2021-10-13 19:55:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75090 states, 75089 states have (on average 7.6942295143096855) internal successors, (577752), 75089 states have internal predecessors, (577752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75090 states to 75090 states and 577752 transitions. [2021-10-13 19:55:51,161 INFO L78 Accepts]: Start accepts. Automaton has 75090 states and 577752 transitions. Word has length 34 [2021-10-13 19:55:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:55:51,162 INFO L470 AbstractCegarLoop]: Abstraction has 75090 states and 577752 transitions. [2021-10-13 19:55:51,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 75090 states and 577752 transitions. [2021-10-13 19:55:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:55:51,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:55:51,876 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:55:51,894 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 19:55:52,089 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 19:55:52,089 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:55:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:55:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash -47725042, now seen corresponding path program 8 times [2021-10-13 19:55:52,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:55:52,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774180176] [2021-10-13 19:55:52,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:55:52,092 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:55:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:55:52,093 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 19:55:52,134 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 19:55:53,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:55:53,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:55:53,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:55:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:55:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:54,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:54,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:54,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774180176] [2021-10-13 19:55:54,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774180176] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:54,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:54,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:55:54,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282791451] [2021-10-13 19:55:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:55:54,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:55:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:55:54,462 INFO L87 Difference]: Start difference. First operand 75090 states and 577752 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:02,610 INFO L93 Difference]: Finished difference Result 133348 states and 979012 transitions. [2021-10-13 19:56:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:56:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:56:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:04,953 INFO L225 Difference]: With dead ends: 133348 [2021-10-13 19:56:04,954 INFO L226 Difference]: Without dead ends: 133348 [2021-10-13 19:56:04,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:56:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133348 states. [2021-10-13 19:56:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133348 to 77464. [2021-10-13 19:56:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77464 states, 77463 states have (on average 7.748047454913959) internal successors, (600187), 77463 states have internal predecessors, (600187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77464 states to 77464 states and 600187 transitions. [2021-10-13 19:56:13,414 INFO L78 Accepts]: Start accepts. Automaton has 77464 states and 600187 transitions. Word has length 34 [2021-10-13 19:56:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:13,414 INFO L470 AbstractCegarLoop]: Abstraction has 77464 states and 600187 transitions. [2021-10-13 19:56:13,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 77464 states and 600187 transitions. [2021-10-13 19:56:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:56:13,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:13,880 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:13,893 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 19:56:14,080 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 19:56:14,081 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:56:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1541415287, now seen corresponding path program 9 times [2021-10-13 19:56:14,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:14,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277937297] [2021-10-13 19:56:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:56:14,083 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:14,084 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 19:56:14,085 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 19:56:15,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:56:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:56:15,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:16,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:16,710 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 19:56:16,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:16,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277937297] [2021-10-13 19:56:16,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277937297] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:16,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:16,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:56:16,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178951168] [2021-10-13 19:56:16,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:56:16,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:16,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:56:16,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:56:16,713 INFO L87 Difference]: Start difference. First operand 77464 states and 600187 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:23,830 INFO L93 Difference]: Finished difference Result 174962 states and 1301009 transitions. [2021-10-13 19:56:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:56:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:56:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:26,995 INFO L225 Difference]: With dead ends: 174962 [2021-10-13 19:56:26,995 INFO L226 Difference]: Without dead ends: 174962 [2021-10-13 19:56:26,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:56:28,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174962 states. [2021-10-13 19:56:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174962 to 86492. [2021-10-13 19:56:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86492 states, 86491 states have (on average 7.833208079453353) internal successors, (677502), 86491 states have internal predecessors, (677502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86492 states to 86492 states and 677502 transitions. [2021-10-13 19:56:38,769 INFO L78 Accepts]: Start accepts. Automaton has 86492 states and 677502 transitions. Word has length 34 [2021-10-13 19:56:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:38,769 INFO L470 AbstractCegarLoop]: Abstraction has 86492 states and 677502 transitions. [2021-10-13 19:56:38,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 86492 states and 677502 transitions. [2021-10-13 19:56:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:56:40,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:40,145 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:40,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-10-13 19:56:40,358 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 19:56:40,358 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:56:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1113239006, now seen corresponding path program 10 times [2021-10-13 19:56:40,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:40,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458321366] [2021-10-13 19:56:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:56:40,362 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:40,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:40,363 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 19:56:40,399 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 19:56:41,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:56:41,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:56:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:41,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:41,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:41,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458321366] [2021-10-13 19:56:41,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458321366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:41,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:41,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:56:41,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202636199] [2021-10-13 19:56:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:56:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:56:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:56:41,920 INFO L87 Difference]: Start difference. First operand 86492 states and 677502 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:57:24,649 INFO L93 Difference]: Finished difference Result 131086 states and 982378 transitions. [2021-10-13 19:57:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:57:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:57:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:57:26,549 INFO L225 Difference]: With dead ends: 131086 [2021-10-13 19:57:26,549 INFO L226 Difference]: Without dead ends: 130958 [2021-10-13 19:57:26,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2399.9ms TimeCoverageRelationStatistics Valid=53, Invalid=128, Unknown=1, NotChecked=0, Total=182 [2021-10-13 19:57:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130958 states. [2021-10-13 19:57:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130958 to 93614. [2021-10-13 19:57:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93614 states, 93613 states have (on average 7.929529018405563) internal successors, (742307), 93613 states have internal predecessors, (742307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93614 states to 93614 states and 742307 transitions. [2021-10-13 19:57:36,314 INFO L78 Accepts]: Start accepts. Automaton has 93614 states and 742307 transitions. Word has length 34 [2021-10-13 19:57:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:57:36,314 INFO L470 AbstractCegarLoop]: Abstraction has 93614 states and 742307 transitions. [2021-10-13 19:57:36,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 93614 states and 742307 transitions. [2021-10-13 19:57:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:57:36,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:57:36,923 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:57:36,939 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 19:57:37,131 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 19:57:37,132 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:57:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:57:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1546091875, now seen corresponding path program 11 times [2021-10-13 19:57:37,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:57:37,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887020042] [2021-10-13 19:57:37,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:57:37,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:57:37,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:57:37,135 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 19:57:37,137 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 19:57:38,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:57:38,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:57:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:57:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:57:38,910 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 19:57:38,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:57:39,576 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 19:57:39,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:57:39,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887020042] [2021-10-13 19:57:39,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887020042] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:57:39,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:57:39,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 19:57:39,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146748526] [2021-10-13 19:57:39,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:57:39,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:57:39,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:57:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:57:39,578 INFO L87 Difference]: Start difference. First operand 93614 states and 742307 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:57:49,023 INFO L93 Difference]: Finished difference Result 215694 states and 1620612 transitions. [2021-10-13 19:57:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:57:49,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:57:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:57:55,787 INFO L225 Difference]: With dead ends: 215694 [2021-10-13 19:57:55,787 INFO L226 Difference]: Without dead ends: 215694 [2021-10-13 19:57:55,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1054.6ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:57:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215694 states. [2021-10-13 19:58:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215694 to 112126. [2021-10-13 19:58:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112126 states, 112125 states have (on average 8.150465997770345) internal successors, (913871), 112125 states have internal predecessors, (913871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112126 states to 112126 states and 913871 transitions. [2021-10-13 19:58:11,464 INFO L78 Accepts]: Start accepts. Automaton has 112126 states and 913871 transitions. Word has length 34 [2021-10-13 19:58:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:58:11,464 INFO L470 AbstractCegarLoop]: Abstraction has 112126 states and 913871 transitions. [2021-10-13 19:58:11,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 112126 states and 913871 transitions. [2021-10-13 19:58:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:58:12,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:58:12,935 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:58:12,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-10-13 19:58:13,149 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 19:58:13,149 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:58:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:58:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 215566478, now seen corresponding path program 12 times [2021-10-13 19:58:13,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:58:13,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43295232] [2021-10-13 19:58:13,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:58:13,152 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:58:13,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:58:13,153 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 19:58:13,154 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 19:58:14,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 19:58:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:58:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:58:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:58:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:58:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:14,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:58:14,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43295232] [2021-10-13 19:58:14,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43295232] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:58:14,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:58:14,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:58:14,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131027356] [2021-10-13 19:58:14,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:58:14,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:58:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:58:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:58:14,710 INFO L87 Difference]: Start difference. First operand 112126 states and 913871 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:58:37,991 INFO L93 Difference]: Finished difference Result 140500 states and 1089848 transitions. [2021-10-13 19:58:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:58:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:58:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:58:40,607 INFO L225 Difference]: With dead ends: 140500 [2021-10-13 19:58:40,608 INFO L226 Difference]: Without dead ends: 140332 [2021-10-13 19:58:40,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:58:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140332 states. [2021-10-13 19:58:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140332 to 114458. [2021-10-13 19:58:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114458 states, 114457 states have (on average 8.116104738023887) internal successors, (928945), 114457 states have internal predecessors, (928945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114458 states to 114458 states and 928945 transitions. [2021-10-13 19:58:52,333 INFO L78 Accepts]: Start accepts. Automaton has 114458 states and 928945 transitions. Word has length 34 [2021-10-13 19:58:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:58:52,334 INFO L470 AbstractCegarLoop]: Abstraction has 114458 states and 928945 transitions. [2021-10-13 19:58:52,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:58:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 114458 states and 928945 transitions. [2021-10-13 19:58:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:58:54,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:58:54,129 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:58:54,149 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 19:58:54,343 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 19:58:54,343 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:58:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:58:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash 581536119, now seen corresponding path program 7 times [2021-10-13 19:58:54,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:58:54,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724824437] [2021-10-13 19:58:54,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:58:54,346 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:58:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:58:54,347 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 19:58:54,381 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 19:58:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:58:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:58:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:58:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:58:55,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:58:56,078 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 19:58:56,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:58:56,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724824437] [2021-10-13 19:58:56,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724824437] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:58:56,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:58:56,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:58:56,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096178001] [2021-10-13 19:58:56,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:58:56,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:58:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:58:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:58:56,080 INFO L87 Difference]: Start difference. First operand 114458 states and 928945 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:10,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:10,431 INFO L93 Difference]: Finished difference Result 182694 states and 1405889 transitions. [2021-10-13 19:59:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 19:59:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:59:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:13,940 INFO L225 Difference]: With dead ends: 182694 [2021-10-13 19:59:13,940 INFO L226 Difference]: Without dead ends: 182610 [2021-10-13 19:59:13,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:59:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182610 states. [2021-10-13 19:59:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182610 to 135628. [2021-10-13 19:59:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135628 states, 135627 states have (on average 8.049002042366196) internal successors, (1091662), 135627 states have internal predecessors, (1091662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135628 states to 135628 states and 1091662 transitions. [2021-10-13 19:59:29,474 INFO L78 Accepts]: Start accepts. Automaton has 135628 states and 1091662 transitions. Word has length 34 [2021-10-13 19:59:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:59:29,474 INFO L470 AbstractCegarLoop]: Abstraction has 135628 states and 1091662 transitions. [2021-10-13 19:59:29,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 135628 states and 1091662 transitions. [2021-10-13 19:59:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 19:59:31,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:59:31,002 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:59:31,020 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 19:59:31,217 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 19:59:31,217 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:59:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:59:31,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1356397535, now seen corresponding path program 8 times [2021-10-13 19:59:31,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:59:31,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103433640] [2021-10-13 19:59:31,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:59:31,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:59:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:59:31,220 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 19:59:31,221 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 19:59:32,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:59:32,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:59:32,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:59:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:59:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:59:32,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:59:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:59:33,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:59:33,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103433640] [2021-10-13 19:59:33,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103433640] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:59:33,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:59:33,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 19:59:33,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803334784] [2021-10-13 19:59:33,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:59:33,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:59:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:59:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:59:33,381 INFO L87 Difference]: Start difference. First operand 135628 states and 1091662 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:42,205 INFO L93 Difference]: Finished difference Result 224804 states and 1737615 transitions. [2021-10-13 19:59:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:59:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 19:59:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:46,574 INFO L225 Difference]: With dead ends: 224804 [2021-10-13 19:59:46,575 INFO L226 Difference]: Without dead ends: 224714 [2021-10-13 19:59:46,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:59:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224714 states. [2021-10-13 20:00:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224714 to 153356. [2021-10-13 20:00:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153356 states, 153355 states have (on average 8.144220925304033) internal successors, (1248957), 153355 states have internal predecessors, (1248957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)