/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 17:43:56,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 17:43:56,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 17:43:56,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 17:43:56,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 17:43:56,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 17:43:56,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 17:43:56,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 17:43:56,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 17:43:56,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 17:43:56,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 17:43:56,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 17:43:56,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 17:43:56,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 17:43:56,689 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 17:43:56,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 17:43:56,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 17:43:56,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 17:43:56,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 17:43:56,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 17:43:56,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 17:43:56,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 17:43:56,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 17:43:56,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 17:43:56,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 17:43:56,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 17:43:56,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 17:43:56,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 17:43:56,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 17:43:56,693 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 17:43:56,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 17:43:56,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 17:43:57,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 17:43:57,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 17:43:57,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 17:43:57,058 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 17:43:57,059 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 17:43:57,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-05-21 17:43:57,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda5a7b3a/8a6f5ea27dd54bb9aaea8afbb884e092/FLAG431393f71 [2021-05-21 17:43:57,678 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 17:43:57,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-05-21 17:43:57,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda5a7b3a/8a6f5ea27dd54bb9aaea8afbb884e092/FLAG431393f71 [2021-05-21 17:43:57,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda5a7b3a/8a6f5ea27dd54bb9aaea8afbb884e092 [2021-05-21 17:43:57,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 17:43:57,990 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 17:43:57,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 17:43:57,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 17:43:58,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 17:43:58,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 05:43:57" (1/1) ... [2021-05-21 17:43:58,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8a53ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58, skipping insertion in model container [2021-05-21 17:43:58,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 05:43:57" (1/1) ... [2021-05-21 17:43:58,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 17:43:58,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 17:43:58,203 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-05-21 17:43:58,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 17:43:58,515 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 17:43:58,525 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-05-21 17:43:58,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 17:43:58,724 INFO L208 MainTranslator]: Completed translation [2021-05-21 17:43:58,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58 WrapperNode [2021-05-21 17:43:58,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 17:43:58,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 17:43:58,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 17:43:58,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 17:43:58,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 17:43:58,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 17:43:58,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 17:43:58,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 17:43:58,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... [2021-05-21 17:43:58,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 17:43:58,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 17:43:58,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 17:43:58,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 17:43:58,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 17:43:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 17:43:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 17:43:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-21 17:43:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-05-21 17:43:58,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-05-21 17:43:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 17:43:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 17:43:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 17:43:58,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 17:43:58,903 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 17:43:59,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 17:43:59,285 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-05-21 17:43:59,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 05:43:59 BoogieIcfgContainer [2021-05-21 17:43:59,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 17:43:59,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 17:43:59,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 17:43:59,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 17:43:59,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 05:43:57" (1/3) ... [2021-05-21 17:43:59,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43900447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 05:43:59, skipping insertion in model container [2021-05-21 17:43:59,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:43:58" (2/3) ... [2021-05-21 17:43:59,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43900447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 05:43:59, skipping insertion in model container [2021-05-21 17:43:59,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 05:43:59" (3/3) ... [2021-05-21 17:43:59,302 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-05-21 17:43:59,307 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 17:43:59,307 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 17:43:59,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 17:43:59,308 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 17:43:59,347 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,347 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,347 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,347 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,347 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,348 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,348 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,348 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,348 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,348 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,350 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,350 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,350 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,351 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,351 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,351 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,351 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,352 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,352 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,352 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,352 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,352 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,353 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,353 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,353 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,353 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,353 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,354 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,354 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,354 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,354 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,355 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,355 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,355 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,355 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,355 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,355 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,357 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,357 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,358 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,358 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,358 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,358 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,358 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,359 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:43:59,367 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-05-21 17:43:59,385 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-21 17:43:59,429 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 17:43:59,429 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 17:43:59,430 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 17:43:59,430 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 17:43:59,430 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 17:43:59,430 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 17:43:59,430 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 17:43:59,430 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 17:43:59,443 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 94 transitions, 196 flow [2021-05-21 17:43:59,475 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 353 states, 351 states have (on average 2.0085470085470085) internal successors, (705), 352 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:43:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 351 states have (on average 2.0085470085470085) internal successors, (705), 352 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:43:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-21 17:43:59,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:43:59,502 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:43:59,503 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:43:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:43:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1922949937, now seen corresponding path program 1 times [2021-05-21 17:43:59,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:43:59,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287445013] [2021-05-21 17:43:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:43:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:43:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:43:59,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:43:59,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287445013] [2021-05-21 17:43:59,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287445013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:43:59,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:43:59,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 17:43:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656760521] [2021-05-21 17:43:59,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-21 17:43:59,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:43:59,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-21 17:43:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-21 17:43:59,804 INFO L87 Difference]: Start difference. First operand has 353 states, 351 states have (on average 2.0085470085470085) internal successors, (705), 352 states have internal predecessors, (705), 0 states have call successors, (0), 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, 2 states have (on average 30.5) internal successors, (61), 2 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) [2021-05-21 17:43:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:43:59,823 INFO L93 Difference]: Finished difference Result 345 states and 645 transitions. [2021-05-21 17:43:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-21 17:43:59,824 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 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 61 [2021-05-21 17:43:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:43:59,834 INFO L225 Difference]: With dead ends: 345 [2021-05-21 17:43:59,835 INFO L226 Difference]: Without dead ends: 297 [2021-05-21 17:43:59,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-21 17:43:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-21 17:43:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-05-21 17:43:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.864864864864865) internal successors, (552), 296 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:43:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 552 transitions. [2021-05-21 17:43:59,891 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 552 transitions. Word has length 61 [2021-05-21 17:43:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:43:59,892 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 552 transitions. [2021-05-21 17:43:59,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 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) [2021-05-21 17:43:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 552 transitions. [2021-05-21 17:43:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-21 17:43:59,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:43:59,902 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:43:59,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 17:43:59,906 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:43:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:43:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash 69507375, now seen corresponding path program 1 times [2021-05-21 17:43:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:43:59,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988386215] [2021-05-21 17:43:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:43:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:44:00,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:00,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988386215] [2021-05-21 17:44:00,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988386215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:44:00,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:44:00,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 17:44:00,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626620468] [2021-05-21 17:44:00,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 17:44:00,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:00,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 17:44:00,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 17:44:00,032 INFO L87 Difference]: Start difference. First operand 297 states and 552 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-05-21 17:44:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:00,072 INFO L93 Difference]: Finished difference Result 357 states and 672 transitions. [2021-05-21 17:44:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 17:44:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 61 [2021-05-21 17:44:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:00,077 INFO L225 Difference]: With dead ends: 357 [2021-05-21 17:44:00,077 INFO L226 Difference]: Without dead ends: 357 [2021-05-21 17:44:00,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 17:44:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-21 17:44:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 312. [2021-05-21 17:44:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.8713826366559485) internal successors, (582), 311 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 582 transitions. [2021-05-21 17:44:00,098 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 582 transitions. Word has length 61 [2021-05-21 17:44:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:00,099 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 582 transitions. [2021-05-21 17:44:00,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-05-21 17:44:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 582 transitions. [2021-05-21 17:44:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-21 17:44:00,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:00,100 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:00,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 17:44:00,100 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash 518804448, now seen corresponding path program 1 times [2021-05-21 17:44:00,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:00,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666573857] [2021-05-21 17:44:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:44:00,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:00,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666573857] [2021-05-21 17:44:00,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666573857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:00,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488597256] [2021-05-21 17:44:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:00,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-05-21 17:44:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 17:44:00,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488597256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:44:00,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 17:44:00,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-05-21 17:44:00,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937245619] [2021-05-21 17:44:00,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 17:44:00,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:00,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 17:44:00,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 17:44:00,446 INFO L87 Difference]: Start difference. First operand 312 states and 582 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-05-21 17:44:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:00,458 INFO L93 Difference]: Finished difference Result 438 states and 834 transitions. [2021-05-21 17:44:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 17:44:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 66 [2021-05-21 17:44:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:00,460 INFO L225 Difference]: With dead ends: 438 [2021-05-21 17:44:00,460 INFO L226 Difference]: Without dead ends: 438 [2021-05-21 17:44:00,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 17:44:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-21 17:44:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 330. [2021-05-21 17:44:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.878419452887538) internal successors, (618), 329 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 618 transitions. [2021-05-21 17:44:00,473 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 618 transitions. Word has length 66 [2021-05-21 17:44:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:00,473 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 618 transitions. [2021-05-21 17:44:00,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-05-21 17:44:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 618 transitions. [2021-05-21 17:44:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-21 17:44:00,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:00,474 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:00,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-21 17:44:00,689 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash -393434949, now seen corresponding path program 1 times [2021-05-21 17:44:00,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:00,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133834883] [2021-05-21 17:44:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 17:44:00,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133834883] [2021-05-21 17:44:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133834883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:00,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142245270] [2021-05-21 17:44:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 17:44:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 17:44:01,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142245270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:01,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:01,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 17:44:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133558243] [2021-05-21 17:44:01,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:44:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:44:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:44:01,010 INFO L87 Difference]: Start difference. First operand 330 states and 618 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:01,073 INFO L93 Difference]: Finished difference Result 458 states and 874 transitions. [2021-05-21 17:44:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 17:44:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-05-21 17:44:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:01,080 INFO L225 Difference]: With dead ends: 458 [2021-05-21 17:44:01,080 INFO L226 Difference]: Without dead ends: 458 [2021-05-21 17:44:01,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-21 17:44:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-21 17:44:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 410. [2021-05-21 17:44:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.902200488997555) internal successors, (778), 409 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 778 transitions. [2021-05-21 17:44:01,092 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 778 transitions. Word has length 74 [2021-05-21 17:44:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:01,104 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 778 transitions. [2021-05-21 17:44:01,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 778 transitions. [2021-05-21 17:44:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-21 17:44:01,106 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:01,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:01,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:01,332 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash 402363818, now seen corresponding path program 2 times [2021-05-21 17:44:01,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:01,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663186223] [2021-05-21 17:44:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-21 17:44:01,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:01,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663186223] [2021-05-21 17:44:01,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663186223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:01,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010042865] [2021-05-21 17:44:01,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:01,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 17:44:01,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:01,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 17:44:01,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-21 17:44:01,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010042865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:01,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:01,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 17:44:01,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112858276] [2021-05-21 17:44:01,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:44:01,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:01,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:44:01,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:44:01,649 INFO L87 Difference]: Start difference. First operand 410 states and 778 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:01,692 INFO L93 Difference]: Finished difference Result 732 states and 1422 transitions. [2021-05-21 17:44:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 17:44:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-05-21 17:44:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:01,696 INFO L225 Difference]: With dead ends: 732 [2021-05-21 17:44:01,697 INFO L226 Difference]: Without dead ends: 732 [2021-05-21 17:44:01,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-21 17:44:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-05-21 17:44:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 594. [2021-05-21 17:44:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.9325463743676223) internal successors, (1146), 593 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1146 transitions. [2021-05-21 17:44:01,720 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1146 transitions. Word has length 79 [2021-05-21 17:44:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:01,720 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1146 transitions. [2021-05-21 17:44:01,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1146 transitions. [2021-05-21 17:44:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-21 17:44:01,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:01,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:01,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:01,939 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1060470651, now seen corresponding path program 3 times [2021-05-21 17:44:01,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:01,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275111736] [2021-05-21 17:44:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-21 17:44:02,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275111736] [2021-05-21 17:44:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275111736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874185595] [2021-05-21 17:44:02,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:02,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 17:44:02,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 17:44:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-21 17:44:02,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874185595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:02,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:02,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 17:44:02,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729551785] [2021-05-21 17:44:02,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 17:44:02,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:02,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 17:44:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 17:44:02,302 INFO L87 Difference]: Start difference. First operand 594 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:03,119 INFO L93 Difference]: Finished difference Result 1220 states and 2398 transitions. [2021-05-21 17:44:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 17:44:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-05-21 17:44:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:03,125 INFO L225 Difference]: With dead ends: 1220 [2021-05-21 17:44:03,125 INFO L226 Difference]: Without dead ends: 1220 [2021-05-21 17:44:03,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 17:44:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-05-21 17:44:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 938. [2021-05-21 17:44:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.9573105656350054) internal successors, (1834), 937 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1834 transitions. [2021-05-21 17:44:03,149 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1834 transitions. Word has length 87 [2021-05-21 17:44:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:03,149 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 1834 transitions. [2021-05-21 17:44:03,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1834 transitions. [2021-05-21 17:44:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 17:44:03,152 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:03,152 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:03,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:03,369 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1607478993, now seen corresponding path program 4 times [2021-05-21 17:44:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:03,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479518530] [2021-05-21 17:44:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-21 17:44:03,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:03,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479518530] [2021-05-21 17:44:03,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479518530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:03,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750226215] [2021-05-21 17:44:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:03,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 17:44:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 17:44:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-21 17:44:03,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750226215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:03,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:03,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 17:44:03,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463038687] [2021-05-21 17:44:03,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 17:44:03,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 17:44:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 17:44:03,738 INFO L87 Difference]: Start difference. First operand 938 states and 1834 transitions. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:03,825 INFO L93 Difference]: Finished difference Result 1194 states and 2346 transitions. [2021-05-21 17:44:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 17:44:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 17:44:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:03,830 INFO L225 Difference]: With dead ends: 1194 [2021-05-21 17:44:03,830 INFO L226 Difference]: Without dead ends: 1194 [2021-05-21 17:44:03,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-05-21 17:44:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-05-21 17:44:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1098. [2021-05-21 17:44:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 1.9635369188696445) internal successors, (2154), 1097 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2154 transitions. [2021-05-21 17:44:03,853 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2154 transitions. Word has length 100 [2021-05-21 17:44:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:03,854 INFO L482 AbstractCegarLoop]: Abstraction has 1098 states and 2154 transitions. [2021-05-21 17:44:03,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2154 transitions. [2021-05-21 17:44:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 17:44:03,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:03,856 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:04,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-21 17:44:04,080 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1071562496, now seen corresponding path program 5 times [2021-05-21 17:44:04,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:04,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541943802] [2021-05-21 17:44:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-21 17:44:04,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:04,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541943802] [2021-05-21 17:44:04,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541943802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:04,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123651792] [2021-05-21 17:44:04,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:04,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 17:44:04,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 17:44:04,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-21 17:44:04,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123651792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:04,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:04,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 17:44:04,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555486594] [2021-05-21 17:44:04,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 17:44:04,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:04,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 17:44:04,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 17:44:04,447 INFO L87 Difference]: Start difference. First operand 1098 states and 2154 transitions. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:04,558 INFO L93 Difference]: Finished difference Result 1354 states and 2666 transitions. [2021-05-21 17:44:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 17:44:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 17:44:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:04,563 INFO L225 Difference]: With dead ends: 1354 [2021-05-21 17:44:04,563 INFO L226 Difference]: Without dead ends: 1354 [2021-05-21 17:44:04,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-05-21 17:44:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-05-21 17:44:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1258. [2021-05-21 17:44:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 1.9681782020684169) internal successors, (2474), 1257 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2474 transitions. [2021-05-21 17:44:04,590 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2474 transitions. Word has length 105 [2021-05-21 17:44:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:04,591 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 2474 transitions. [2021-05-21 17:44:04,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2474 transitions. [2021-05-21 17:44:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 17:44:04,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:04,593 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:04,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:04,809 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:04,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:04,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1117647921, now seen corresponding path program 6 times [2021-05-21 17:44:04,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:04,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24978537] [2021-05-21 17:44:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-21 17:44:04,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:04,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24978537] [2021-05-21 17:44:04,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24978537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:04,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486707375] [2021-05-21 17:44:04,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:05,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 17:44:05,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 17:44:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-21 17:44:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486707375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:05,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:05,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-05-21 17:44:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331903036] [2021-05-21 17:44:05,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 17:44:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:05,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 17:44:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-21 17:44:05,269 INFO L87 Difference]: Start difference. First operand 1258 states and 2474 transitions. Second operand has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:08,876 INFO L93 Difference]: Finished difference Result 2158 states and 4274 transitions. [2021-05-21 17:44:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-05-21 17:44:08,877 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 17:44:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:08,884 INFO L225 Difference]: With dead ends: 2158 [2021-05-21 17:44:08,884 INFO L226 Difference]: Without dead ends: 2158 [2021-05-21 17:44:08,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16756 ImplicationChecksByTransitivity, 3260.5ms TimeCoverageRelationStatistics Valid=7859, Invalid=30361, Unknown=0, NotChecked=0, Total=38220 [2021-05-21 17:44:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-05-21 17:44:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1762. [2021-05-21 17:44:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.9772856331629756) internal successors, (3482), 1761 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3482 transitions. [2021-05-21 17:44:08,929 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3482 transitions. Word has length 110 [2021-05-21 17:44:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:08,930 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3482 transitions. [2021-05-21 17:44:08,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3482 transitions. [2021-05-21 17:44:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-21 17:44:08,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:08,934 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:09,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:09,140 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1276635771, now seen corresponding path program 7 times [2021-05-21 17:44:09,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:09,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72171806] [2021-05-21 17:44:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-21 17:44:09,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:09,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72171806] [2021-05-21 17:44:09,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72171806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:09,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269719013] [2021-05-21 17:44:09,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 17:44:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-21 17:44:09,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269719013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:09,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:09,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-21 17:44:09,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152270246] [2021-05-21 17:44:09,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 17:44:09,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 17:44:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 17:44:09,552 INFO L87 Difference]: Start difference. First operand 1762 states and 3482 transitions. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:09,712 INFO L93 Difference]: Finished difference Result 2082 states and 4122 transitions. [2021-05-21 17:44:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 17:44:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-05-21 17:44:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:09,720 INFO L225 Difference]: With dead ends: 2082 [2021-05-21 17:44:09,720 INFO L226 Difference]: Without dead ends: 2082 [2021-05-21 17:44:09,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-05-21 17:44:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-05-21 17:44:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1962. [2021-05-21 17:44:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.979602243753187) internal successors, (3882), 1961 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3882 transitions. [2021-05-21 17:44:09,758 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3882 transitions. Word has length 123 [2021-05-21 17:44:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:09,758 INFO L482 AbstractCegarLoop]: Abstraction has 1962 states and 3882 transitions. [2021-05-21 17:44:09,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3882 transitions. [2021-05-21 17:44:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-21 17:44:09,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:09,762 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:09,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 17:44:09,981 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1626379628, now seen corresponding path program 8 times [2021-05-21 17:44:09,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:09,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019191512] [2021-05-21 17:44:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-21 17:44:10,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:10,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019191512] [2021-05-21 17:44:10,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019191512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:10,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204788048] [2021-05-21 17:44:10,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:10,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 17:44:10,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 17:44:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-21 17:44:10,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204788048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:10,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:10,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-05-21 17:44:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047131249] [2021-05-21 17:44:10,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 17:44:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 17:44:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-05-21 17:44:10,424 INFO L87 Difference]: Start difference. First operand 1962 states and 3882 transitions. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:10,671 INFO L93 Difference]: Finished difference Result 2282 states and 4522 transitions. [2021-05-21 17:44:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 17:44:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-05-21 17:44:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:10,679 INFO L225 Difference]: With dead ends: 2282 [2021-05-21 17:44:10,679 INFO L226 Difference]: Without dead ends: 2282 [2021-05-21 17:44:10,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 17:44:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-05-21 17:44:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2162. [2021-05-21 17:44:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.98149005090236) internal successors, (4282), 2161 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 4282 transitions. [2021-05-21 17:44:10,723 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 4282 transitions. Word has length 128 [2021-05-21 17:44:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:10,724 INFO L482 AbstractCegarLoop]: Abstraction has 2162 states and 4282 transitions. [2021-05-21 17:44:10,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 4282 transitions. [2021-05-21 17:44:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-21 17:44:10,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:10,729 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:10,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:10,945 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1177688347, now seen corresponding path program 9 times [2021-05-21 17:44:10,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:10,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263812124] [2021-05-21 17:44:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-21 17:44:11,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:11,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263812124] [2021-05-21 17:44:11,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263812124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:11,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807059886] [2021-05-21 17:44:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:11,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 17:44:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:11,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 17:44:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-21 17:44:11,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807059886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:11,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:11,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-05-21 17:44:11,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421208963] [2021-05-21 17:44:11,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 17:44:11,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:11,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 17:44:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-05-21 17:44:11,472 INFO L87 Difference]: Start difference. First operand 2162 states and 4282 transitions. Second operand has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 28 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:21,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:21,091 INFO L93 Difference]: Finished difference Result 3336 states and 6630 transitions. [2021-05-21 17:44:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 365 states. [2021-05-21 17:44:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 28 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-05-21 17:44:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:21,100 INFO L225 Difference]: With dead ends: 3336 [2021-05-21 17:44:21,100 INFO L226 Difference]: Without dead ends: 3336 [2021-05-21 17:44:21,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66570 ImplicationChecksByTransitivity, 8988.3ms TimeCoverageRelationStatistics Valid=27129, Invalid=114623, Unknown=0, NotChecked=0, Total=141752 [2021-05-21 17:44:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-05-21 17:44:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2826. [2021-05-21 17:44:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 1.9858407079646017) internal successors, (5610), 2825 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 5610 transitions. [2021-05-21 17:44:21,161 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 5610 transitions. Word has length 133 [2021-05-21 17:44:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:21,161 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 5610 transitions. [2021-05-21 17:44:21,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 28 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 5610 transitions. [2021-05-21 17:44:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-21 17:44:21,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:21,167 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:21,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:21,389 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash 556479399, now seen corresponding path program 10 times [2021-05-21 17:44:21,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:21,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504507188] [2021-05-21 17:44:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-21 17:44:21,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:21,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504507188] [2021-05-21 17:44:21,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504507188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:21,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879161296] [2021-05-21 17:44:21,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:21,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 17:44:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 17:44:21,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-21 17:44:21,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879161296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:21,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:21,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 17:44:21,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333849212] [2021-05-21 17:44:21,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 17:44:21,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 17:44:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-05-21 17:44:21,895 INFO L87 Difference]: Start difference. First operand 2826 states and 5610 transitions. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:22,177 INFO L93 Difference]: Finished difference Result 3210 states and 6378 transitions. [2021-05-21 17:44:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 17:44:22,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-05-21 17:44:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:22,185 INFO L225 Difference]: With dead ends: 3210 [2021-05-21 17:44:22,185 INFO L226 Difference]: Without dead ends: 3210 [2021-05-21 17:44:22,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 17:44:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-05-21 17:44:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3066. [2021-05-21 17:44:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 3065 states have (on average 1.9869494290375205) internal successors, (6090), 3065 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 6090 transitions. [2021-05-21 17:44:22,249 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 6090 transitions. Word has length 146 [2021-05-21 17:44:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:22,249 INFO L482 AbstractCegarLoop]: Abstraction has 3066 states and 6090 transitions. [2021-05-21 17:44:22,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 6090 transitions. [2021-05-21 17:44:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-21 17:44:22,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:22,256 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:22,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 17:44:22,478 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1605028246, now seen corresponding path program 11 times [2021-05-21 17:44:22,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:22,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438108108] [2021-05-21 17:44:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-21 17:44:22,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:22,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438108108] [2021-05-21 17:44:22,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438108108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:22,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794059609] [2021-05-21 17:44:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:22,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 17:44:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 17:44:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-21 17:44:23,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794059609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:23,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:23,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-05-21 17:44:23,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936339828] [2021-05-21 17:44:23,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 17:44:23,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 17:44:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 17:44:23,140 INFO L87 Difference]: Start difference. First operand 3066 states and 6090 transitions. Second operand has 34 states, 34 states have (on average 4.970588235294118) internal successors, (169), 34 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:44:41,595 INFO L93 Difference]: Finished difference Result 4444 states and 8846 transitions. [2021-05-21 17:44:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-05-21 17:44:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.970588235294118) internal successors, (169), 34 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-05-21 17:44:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:44:41,607 INFO L225 Difference]: With dead ends: 4444 [2021-05-21 17:44:41,608 INFO L226 Difference]: Without dead ends: 4444 [2021-05-21 17:44:41,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151458 ImplicationChecksByTransitivity, 17595.4ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-05-21 17:44:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-05-21 17:44:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 3850. [2021-05-21 17:44:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 3849 states have (on average 1.9896076903091713) internal successors, (7658), 3849 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 7658 transitions. [2021-05-21 17:44:41,683 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 7658 transitions. Word has length 151 [2021-05-21 17:44:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:44:41,683 INFO L482 AbstractCegarLoop]: Abstraction has 3850 states and 7658 transitions. [2021-05-21 17:44:41,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 4.970588235294118) internal successors, (169), 34 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:44:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 7658 transitions. [2021-05-21 17:44:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-21 17:44:41,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:44:41,692 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:44:41,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 17:44:41,915 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:44:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:44:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1225339166, now seen corresponding path program 12 times [2021-05-21 17:44:41,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:44:41,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064213153] [2021-05-21 17:44:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:44:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:44:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-05-21 17:44:42,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:44:42,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064213153] [2021-05-21 17:44:42,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064213153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298038603] [2021-05-21 17:44:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:44:42,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 17:44:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:44:42,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 17:44:42,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:44:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-05-21 17:44:42,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298038603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:44:42,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:44:42,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-05-21 17:44:42,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144645819] [2021-05-21 17:44:42,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 17:44:42,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:44:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 17:44:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 17:44:42,658 INFO L87 Difference]: Start difference. First operand 3850 states and 7658 transitions. Second operand has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:45:11,848 INFO L93 Difference]: Finished difference Result 5362 states and 10682 transitions. [2021-05-21 17:45:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 701 states. [2021-05-21 17:45:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-05-21 17:45:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:45:11,856 INFO L225 Difference]: With dead ends: 5362 [2021-05-21 17:45:11,856 INFO L226 Difference]: Without dead ends: 5362 [2021-05-21 17:45:11,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 716 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253004 ImplicationChecksByTransitivity, 27956.1ms TimeCoverageRelationStatistics Valid=92780, Invalid=422026, Unknown=0, NotChecked=0, Total=514806 [2021-05-21 17:45:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2021-05-21 17:45:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4714. [2021-05-21 17:45:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 1.991512836834288) internal successors, (9386), 4713 states have internal predecessors, (9386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 9386 transitions. [2021-05-21 17:45:11,948 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 9386 transitions. Word has length 164 [2021-05-21 17:45:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:45:11,948 INFO L482 AbstractCegarLoop]: Abstraction has 4714 states and 9386 transitions. [2021-05-21 17:45:11,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 9386 transitions. [2021-05-21 17:45:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-21 17:45:11,958 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:45:11,958 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:45:12,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 17:45:12,183 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:45:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:45:12,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1616708884, now seen corresponding path program 13 times [2021-05-21 17:45:12,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:45:12,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088714729] [2021-05-21 17:45:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:45:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:45:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-05-21 17:45:12,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:45:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088714729] [2021-05-21 17:45:12,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088714729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:45:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824185145] [2021-05-21 17:45:12,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:45:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:45:12,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 17:45:12,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:45:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-05-21 17:45:12,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824185145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:45:12,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:45:12,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 17:45:12,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540274962] [2021-05-21 17:45:12,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 17:45:12,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:45:12,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 17:45:12,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-05-21 17:45:12,886 INFO L87 Difference]: Start difference. First operand 4714 states and 9386 transitions. Second operand has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:45:13,309 INFO L93 Difference]: Finished difference Result 5226 states and 10410 transitions. [2021-05-21 17:45:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 17:45:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-05-21 17:45:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:45:13,319 INFO L225 Difference]: With dead ends: 5226 [2021-05-21 17:45:13,319 INFO L226 Difference]: Without dead ends: 5226 [2021-05-21 17:45:13,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 17:45:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-05-21 17:45:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5034. [2021-05-21 17:45:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 1.9920524538048878) internal successors, (10026), 5033 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 10026 transitions. [2021-05-21 17:45:13,393 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 10026 transitions. Word has length 177 [2021-05-21 17:45:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:45:13,394 INFO L482 AbstractCegarLoop]: Abstraction has 5034 states and 10026 transitions. [2021-05-21 17:45:13,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 10026 transitions. [2021-05-21 17:45:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-21 17:45:13,403 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:45:13,403 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:45:13,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:45:13,627 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:45:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:45:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1954781411, now seen corresponding path program 14 times [2021-05-21 17:45:13,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:45:13,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950186189] [2021-05-21 17:45:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:45:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:45:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-05-21 17:45:13,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:45:13,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950186189] [2021-05-21 17:45:13,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950186189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:45:13,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343915008] [2021-05-21 17:45:13,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:45:14,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 17:45:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:45:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 17:45:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:45:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-05-21 17:45:14,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343915008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:45:14,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:45:14,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-05-21 17:45:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758252227] [2021-05-21 17:45:14,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 17:45:14,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:45:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 17:45:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-05-21 17:45:14,287 INFO L87 Difference]: Start difference. First operand 5034 states and 10026 transitions. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:45:14,736 INFO L93 Difference]: Finished difference Result 5546 states and 11050 transitions. [2021-05-21 17:45:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 17:45:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-05-21 17:45:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:45:14,745 INFO L225 Difference]: With dead ends: 5546 [2021-05-21 17:45:14,745 INFO L226 Difference]: Without dead ends: 5546 [2021-05-21 17:45:14,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 17:45:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-05-21 17:45:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5354. [2021-05-21 17:45:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5353 states have (on average 1.9925275546422567) internal successors, (10666), 5353 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 10666 transitions. [2021-05-21 17:45:14,821 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 10666 transitions. Word has length 182 [2021-05-21 17:45:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:45:14,821 INFO L482 AbstractCegarLoop]: Abstraction has 5354 states and 10666 transitions. [2021-05-21 17:45:14,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:45:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 10666 transitions. [2021-05-21 17:45:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-21 17:45:14,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:45:14,831 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:45:15,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 17:45:15,049 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:45:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:45:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1102843508, now seen corresponding path program 15 times [2021-05-21 17:45:15,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:45:15,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873297813] [2021-05-21 17:45:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:45:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:45:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-05-21 17:45:15,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:45:15,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873297813] [2021-05-21 17:45:15,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873297813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:45:15,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370656320] [2021-05-21 17:45:15,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:45:15,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 17:45:15,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:45:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 17:45:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:45:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-05-21 17:45:16,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370656320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:45:16,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:45:16,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 46 [2021-05-21 17:45:16,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580118293] [2021-05-21 17:45:16,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-21 17:45:16,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:45:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-21 17:45:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 17:45:16,055 INFO L87 Difference]: Start difference. First operand 5354 states and 10666 transitions. Second operand has 46 states, 46 states have (on average 4.456521739130435) internal successors, (205), 46 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:46:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:46:13,931 INFO L93 Difference]: Finished difference Result 7140 states and 14238 transitions. [2021-05-21 17:46:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2021-05-21 17:46:13,932 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.456521739130435) internal successors, (205), 46 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-05-21 17:46:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:46:13,940 INFO L225 Difference]: With dead ends: 7140 [2021-05-21 17:46:13,940 INFO L226 Difference]: Without dead ends: 7140 [2021-05-21 17:46:13,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2193 GetRequests, 1161 SyntacticMatches, 0 SemanticMatches, 1032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534325 ImplicationChecksByTransitivity, 55562.9ms TimeCoverageRelationStatistics Valid=187686, Invalid=880436, Unknown=0, NotChecked=0, Total=1068122 [2021-05-21 17:46:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-05-21 17:46:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 6378. [2021-05-21 17:46:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 6377 states have (on average 1.9937274580523758) internal successors, (12714), 6377 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:46:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 12714 transitions. [2021-05-21 17:46:14,070 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 12714 transitions. Word has length 187 [2021-05-21 17:46:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:46:14,071 INFO L482 AbstractCegarLoop]: Abstraction has 6378 states and 12714 transitions. [2021-05-21 17:46:14,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 4.456521739130435) internal successors, (205), 46 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:46:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 12714 transitions. [2021-05-21 17:46:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 17:46:14,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:46:14,085 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:46:14,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 17:46:14,305 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:46:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:46:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash 493157464, now seen corresponding path program 16 times [2021-05-21 17:46:14,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:46:14,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692640535] [2021-05-21 17:46:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:46:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:46:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-05-21 17:46:14,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:46:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692640535] [2021-05-21 17:46:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692640535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:46:14,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143896141] [2021-05-21 17:46:14,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:46:14,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 17:46:14,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:46:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 17:46:14,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:46:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-05-21 17:46:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143896141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:46:15,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:46:15,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-05-21 17:46:15,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122906293] [2021-05-21 17:46:15,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 17:46:15,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:46:15,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 17:46:15,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 17:46:15,007 INFO L87 Difference]: Start difference. First operand 6378 states and 12714 transitions. Second operand has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:46:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:46:15,557 INFO L93 Difference]: Finished difference Result 6954 states and 13866 transitions. [2021-05-21 17:46:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 17:46:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 17:46:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:46:15,565 INFO L225 Difference]: With dead ends: 6954 [2021-05-21 17:46:15,566 INFO L226 Difference]: Without dead ends: 6954 [2021-05-21 17:46:15,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 17:46:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2021-05-21 17:46:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 6738. [2021-05-21 17:46:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 1.9940626391568947) internal successors, (13434), 6737 states have internal predecessors, (13434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:46:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 13434 transitions. [2021-05-21 17:46:15,659 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 13434 transitions. Word has length 200 [2021-05-21 17:46:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:46:15,659 INFO L482 AbstractCegarLoop]: Abstraction has 6738 states and 13434 transitions. [2021-05-21 17:46:15,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:46:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 13434 transitions. [2021-05-21 17:46:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-05-21 17:46:15,671 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:46:15,671 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:46:15,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:46:15,895 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:46:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:46:15,896 INFO L82 PathProgramCache]: Analyzing trace with hash -771856121, now seen corresponding path program 17 times [2021-05-21 17:46:15,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:46:15,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924702250] [2021-05-21 17:46:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:46:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:46:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-05-21 17:46:16,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:46:16,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924702250] [2021-05-21 17:46:16,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924702250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:46:16,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167904658] [2021-05-21 17:46:16,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:46:16,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 17:46:16,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:46:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 17:46:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:46:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-05-21 17:46:16,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167904658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:46:16,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:46:16,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 19] total 52 [2021-05-21 17:46:16,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653663642] [2021-05-21 17:46:16,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-21 17:46:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:46:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-21 17:46:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 17:46:16,877 INFO L87 Difference]: Start difference. First operand 6738 states and 13434 transitions. Second operand has 52 states, 52 states have (on average 4.288461538461538) internal successors, (223), 52 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:46:53,515 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-21 17:47:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:47:49,022 INFO L93 Difference]: Finished difference Result 8728 states and 17414 transitions. [2021-05-21 17:47:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1301 states. [2021-05-21 17:47:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.288461538461538) internal successors, (223), 52 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-05-21 17:47:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:47:49,029 INFO L225 Difference]: With dead ends: 8728 [2021-05-21 17:47:49,029 INFO L226 Difference]: Without dead ends: 8728 [2021-05-21 17:47:49,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2785 GetRequests, 1462 SyntacticMatches, 0 SemanticMatches, 1323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886582 ImplicationChecksByTransitivity, 88325.9ms TimeCoverageRelationStatistics Valid=303321, Invalid=1450979, Unknown=0, NotChecked=0, Total=1754300 [2021-05-21 17:47:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-05-21 17:47:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 7882. [2021-05-21 17:47:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7882 states, 7881 states have (on average 1.9949245019667554) internal successors, (15722), 7881 states have internal predecessors, (15722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:47:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 15722 transitions. [2021-05-21 17:47:49,189 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 15722 transitions. Word has length 205 [2021-05-21 17:47:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:47:49,189 INFO L482 AbstractCegarLoop]: Abstraction has 7882 states and 15722 transitions. [2021-05-21 17:47:49,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 4.288461538461538) internal successors, (223), 52 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:47:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 15722 transitions. [2021-05-21 17:47:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-21 17:47:49,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:47:49,202 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:47:49,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:47:49,425 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:47:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:47:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash -522613101, now seen corresponding path program 18 times [2021-05-21 17:47:49,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:47:49,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919628308] [2021-05-21 17:47:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:47:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:47:50,141 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-05-21 17:47:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-05-21 17:47:50,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:47:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919628308] [2021-05-21 17:47:50,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919628308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:47:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674511232] [2021-05-21 17:47:50,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:47:50,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-21 17:47:50,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:47:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 17:47:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:47:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-05-21 17:47:51,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674511232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:47:51,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:47:51,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2021-05-21 17:47:51,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286434542] [2021-05-21 17:47:51,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-21 17:47:51,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:47:51,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-21 17:47:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2601, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 17:47:51,157 INFO L87 Difference]: Start difference. First operand 7882 states and 15722 transitions. Second operand has 56 states, 56 states have (on average 4.214285714285714) internal successors, (236), 56 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:49:01,414 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-21 17:50:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:50:00,821 INFO L93 Difference]: Finished difference Result 10006 states and 19970 transitions. [2021-05-21 17:50:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1538 states. [2021-05-21 17:50:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.214285714285714) internal successors, (236), 56 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-05-21 17:50:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:50:00,828 INFO L225 Difference]: With dead ends: 10006 [2021-05-21 17:50:00,829 INFO L226 Difference]: Without dead ends: 10006 [2021-05-21 17:50:00,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3270 GetRequests, 1708 SyntacticMatches, 0 SemanticMatches, 1562 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243135 ImplicationChecksByTransitivity, 124665.9ms TimeCoverageRelationStatistics Valid=418136, Invalid=2026396, Unknown=0, NotChecked=0, Total=2444532 [2021-05-21 17:50:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2021-05-21 17:50:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 9106. [2021-05-21 17:50:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9106 states, 9105 states have (on average 1.9956068094453596) internal successors, (18170), 9105 states have internal predecessors, (18170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9106 states to 9106 states and 18170 transitions. [2021-05-21 17:50:01,031 INFO L78 Accepts]: Start accepts. Automaton has 9106 states and 18170 transitions. Word has length 218 [2021-05-21 17:50:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:50:01,032 INFO L482 AbstractCegarLoop]: Abstraction has 9106 states and 18170 transitions. [2021-05-21 17:50:01,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 4.214285714285714) internal successors, (236), 56 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9106 states and 18170 transitions. [2021-05-21 17:50:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-05-21 17:50:01,044 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:50:01,045 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:50:01,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:50:01,261 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:50:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:50:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1286709155, now seen corresponding path program 19 times [2021-05-21 17:50:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:50:01,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096322134] [2021-05-21 17:50:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:50:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:50:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-21 17:50:01,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:50:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096322134] [2021-05-21 17:50:01,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096322134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:50:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080561909] [2021-05-21 17:50:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:50:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:50:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 17:50:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:50:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-21 17:50:02,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080561909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:50:02,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:50:02,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-05-21 17:50:02,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286381157] [2021-05-21 17:50:02,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-21 17:50:02,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:50:02,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-21 17:50:02,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 17:50:02,147 INFO L87 Difference]: Start difference. First operand 9106 states and 18170 transitions. Second operand has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:50:03,070 INFO L93 Difference]: Finished difference Result 9810 states and 19578 transitions. [2021-05-21 17:50:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 17:50:03,070 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-05-21 17:50:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:50:03,078 INFO L225 Difference]: With dead ends: 9810 [2021-05-21 17:50:03,078 INFO L226 Difference]: Without dead ends: 9810 [2021-05-21 17:50:03,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1113.6ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 17:50:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-05-21 17:50:03,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 9546. [2021-05-21 17:50:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9546 states, 9545 states have (on average 1.995809324253536) internal successors, (19050), 9545 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9546 states to 9546 states and 19050 transitions. [2021-05-21 17:50:03,197 INFO L78 Accepts]: Start accepts. Automaton has 9546 states and 19050 transitions. Word has length 231 [2021-05-21 17:50:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:50:03,198 INFO L482 AbstractCegarLoop]: Abstraction has 9546 states and 19050 transitions. [2021-05-21 17:50:03,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9546 states and 19050 transitions. [2021-05-21 17:50:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-21 17:50:03,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:50:03,210 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:50:03,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 17:50:03,423 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:50:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:50:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash 528686542, now seen corresponding path program 20 times [2021-05-21 17:50:03,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:50:03,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454597373] [2021-05-21 17:50:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:50:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:50:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-21 17:50:03,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:50:03,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454597373] [2021-05-21 17:50:03,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454597373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:50:03,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689322217] [2021-05-21 17:50:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:50:04,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 17:50:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:50:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 17:50:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:50:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-21 17:50:04,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689322217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:50:04,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:50:04,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-05-21 17:50:04,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505100586] [2021-05-21 17:50:04,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 17:50:04,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:50:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 17:50:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 17:50:04,380 INFO L87 Difference]: Start difference. First operand 9546 states and 19050 transitions. Second operand has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:50:05,372 INFO L93 Difference]: Finished difference Result 9986 states and 19930 transitions. [2021-05-21 17:50:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 17:50:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-05-21 17:50:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:50:05,386 INFO L225 Difference]: With dead ends: 9986 [2021-05-21 17:50:05,386 INFO L226 Difference]: Without dead ends: 9986 [2021-05-21 17:50:05,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1215.0ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 17:50:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-05-21 17:50:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9986. [2021-05-21 17:50:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 1.9959939909864797) internal successors, (19930), 9985 states have internal predecessors, (19930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 19930 transitions. [2021-05-21 17:50:05,506 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 19930 transitions. Word has length 236 [2021-05-21 17:50:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:50:05,506 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 19930 transitions. [2021-05-21 17:50:05,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:50:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 19930 transitions. [2021-05-21 17:50:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-05-21 17:50:05,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:50:05,517 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:50:05,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 17:50:05,725 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:50:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:50:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2022711037, now seen corresponding path program 21 times [2021-05-21 17:50:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:50:05,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794980077] [2021-05-21 17:50:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:50:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:50:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 1340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:50:06,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:50:06,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794980077] [2021-05-21 17:50:06,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794980077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:50:06,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136695125] [2021-05-21 17:50:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:50:06,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 17:50:06,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:50:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 17:50:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:50:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-05-21 17:50:07,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136695125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:50:07,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:50:07,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2021-05-21 17:50:07,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097764732] [2021-05-21 17:50:07,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-21 17:50:07,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:50:07,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-21 17:50:07,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3671, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 17:50:07,410 INFO L87 Difference]: Start difference. First operand 9986 states and 19930 transitions. Second operand has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:51:06,883 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-21 17:51:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:51:13,733 INFO L93 Difference]: Finished difference Result 170472 states and 340902 transitions. [2021-05-21 17:51:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1102 states. [2021-05-21 17:51:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-05-21 17:51:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:51:13,912 INFO L225 Difference]: With dead ends: 170472 [2021-05-21 17:51:13,912 INFO L226 Difference]: Without dead ends: 170472 [2021-05-21 17:51:14,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2400 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 1123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635937 ImplicationChecksByTransitivity, 57962.5ms TimeCoverageRelationStatistics Valid=255553, Invalid=1008947, Unknown=0, NotChecked=0, Total=1264500 [2021-05-21 17:51:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170472 states. [2021-05-21 17:51:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170472 to 10890. [2021-05-21 17:51:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10890 states, 10889 states have (on average 1.9963265680962439) internal successors, (21738), 10889 states have internal predecessors, (21738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:51:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10890 states to 10890 states and 21738 transitions. [2021-05-21 17:51:14,815 INFO L78 Accepts]: Start accepts. Automaton has 10890 states and 21738 transitions. Word has length 241 [2021-05-21 17:51:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:51:14,816 INFO L482 AbstractCegarLoop]: Abstraction has 10890 states and 21738 transitions. [2021-05-21 17:51:14,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:51:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 10890 states and 21738 transitions. [2021-05-21 17:51:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-05-21 17:51:14,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:51:14,830 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:51:15,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:51:15,053 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:51:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:51:15,054 INFO L82 PathProgramCache]: Analyzing trace with hash -17430824, now seen corresponding path program 22 times [2021-05-21 17:51:15,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:51:15,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350934544] [2021-05-21 17:51:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:51:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:51:15,817 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-05-21 17:51:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 1421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:51:15,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:51:15,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350934544] [2021-05-21 17:51:15,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350934544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:51:15,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813682051] [2021-05-21 17:51:15,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:51:16,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 17:51:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:51:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 17:51:16,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:51:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-05-21 17:51:16,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813682051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:51:16,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:51:16,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25] total 71 [2021-05-21 17:51:16,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013769174] [2021-05-21 17:51:16,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-21 17:51:16,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:51:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-21 17:51:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=4148, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 17:51:16,912 INFO L87 Difference]: Start difference. First operand 10890 states and 21738 transitions. Second operand has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:52:39,259 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-21 17:52:50,236 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-21 17:52:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:52:57,131 INFO L93 Difference]: Finished difference Result 211585 states and 423128 transitions. [2021-05-21 17:52:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1363 states. [2021-05-21 17:52:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-05-21 17:52:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:52:57,351 INFO L225 Difference]: With dead ends: 211585 [2021-05-21 17:52:57,351 INFO L226 Difference]: Without dead ends: 211585 [2021-05-21 17:52:57,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2928 GetRequests, 1542 SyntacticMatches, 0 SemanticMatches, 1386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983344 ImplicationChecksByTransitivity, 86264.0ms TimeCoverageRelationStatistics Valid=390931, Invalid=1534225, Unknown=0, NotChecked=0, Total=1925156 [2021-05-21 17:52:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211585 states. [2021-05-21 17:52:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211585 to 11794. [2021-05-21 17:52:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 11793 states have (on average 1.9966081573814976) internal successors, (23546), 11793 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:52:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 23546 transitions. [2021-05-21 17:52:58,557 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 23546 transitions. Word has length 249 [2021-05-21 17:52:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:52:58,557 INFO L482 AbstractCegarLoop]: Abstraction has 11794 states and 23546 transitions. [2021-05-21 17:52:58,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:52:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 23546 transitions. [2021-05-21 17:52:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-05-21 17:52:58,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:52:58,570 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:52:58,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 17:52:58,781 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:52:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:52:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash -418389069, now seen corresponding path program 23 times [2021-05-21 17:52:58,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:52:58,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115477758] [2021-05-21 17:52:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:52:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:52:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:52:59,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:52:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115477758] [2021-05-21 17:52:59,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115477758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:52:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305451952] [2021-05-21 17:52:59,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:52:59,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-05-21 17:52:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 17:52:59,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 17:52:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 17:53:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-05-21 17:53:00,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305451952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 17:53:00,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 17:53:00,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-05-21 17:53:00,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117250060] [2021-05-21 17:53:00,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-21 17:53:00,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:53:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-21 17:53:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4653, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 17:53:00,740 INFO L87 Difference]: Start difference. First operand 11794 states and 23546 transitions. Second operand has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:55:18,672 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 Received shutdown request... [2021-05-21 17:55:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1570 states. [2021-05-21 17:55:26,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 17:55:26,577 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 17:55:26,579 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 17:55:26,580 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 17:55:26,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 05:55:26 BasicIcfg [2021-05-21 17:55:26,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 17:55:26,581 INFO L168 Benchmark]: Toolchain (without parser) took 688591.30 ms. Allocated memory was 335.5 MB in the beginning and 5.6 GB in the end (delta: 5.3 GB). Free memory was 296.7 MB in the beginning and 3.0 GB in the end (delta: -2.7 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. [2021-05-21 17:55:26,582 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 335.5 MB. Free memory was 315.9 MB in the beginning and 315.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 17:55:26,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.75 ms. Allocated memory is still 335.5 MB. Free memory was 296.5 MB in the beginning and 244.4 MB in the end (delta: 52.2 MB). Peak memory consumption was 53.3 MB. Max. memory is 16.0 GB. [2021-05-21 17:55:26,582 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.22 ms. Allocated memory is still 335.5 MB. Free memory was 244.4 MB in the beginning and 242.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 17:55:26,582 INFO L168 Benchmark]: Boogie Preprocessor took 34.64 ms. Allocated memory is still 335.5 MB. Free memory was 242.3 MB in the beginning and 240.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 17:55:26,582 INFO L168 Benchmark]: RCFGBuilder took 458.55 ms. Allocated memory is still 335.5 MB. Free memory was 240.7 MB in the beginning and 212.1 MB in the end (delta: 28.6 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-05-21 17:55:26,582 INFO L168 Benchmark]: TraceAbstraction took 687293.29 ms. Allocated memory was 335.5 MB in the beginning and 5.6 GB in the end (delta: 5.3 GB). Free memory was 212.1 MB in the beginning and 3.0 GB in the end (delta: -2.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 16.0 GB. [2021-05-21 17:55:26,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 335.5 MB. Free memory was 315.9 MB in the beginning and 315.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 732.75 ms. Allocated memory is still 335.5 MB. Free memory was 296.5 MB in the beginning and 244.4 MB in the end (delta: 52.2 MB). Peak memory consumption was 53.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 66.22 ms. Allocated memory is still 335.5 MB. Free memory was 244.4 MB in the beginning and 242.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 34.64 ms. Allocated memory is still 335.5 MB. Free memory was 242.3 MB in the beginning and 240.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 458.55 ms. Allocated memory is still 335.5 MB. Free memory was 240.7 MB in the beginning and 212.1 MB in the end (delta: 28.6 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 687293.29 ms. Allocated memory was 335.5 MB in the beginning and 5.6 GB in the end (delta: 5.3 GB). Free memory was 212.1 MB in the beginning and 3.0 GB in the end (delta: -2.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (11794states) and FLOYD_HOARE automaton (currently 1570 states, 75 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1599 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 104 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 687153.5ms, OverallIterations: 26, TraceHistogramMax: 20, EmptinessCheckTime: 202.5ms, AutomataDifference: 658595.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2769 SDtfs, 179568 SDslu, 44828 SDs, 0 SdLazy, 8315 SolverSat, 29782 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13344.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23750 GetRequests, 13343 SyntacticMatches, 0 SemanticMatches, 10406 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6106450 ImplicationChecksByTransitivity, 601060.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11794occurred in iteration=25, InterpolantAutomatonStates: 8549, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3039.5ms AutomataMinimizationTime, 25 MinimizatonAttempts, 366090 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 547.1ms SsaConstructionTime, 1657.3ms SatisfiabilityAnalysisTime, 15751.6ms InterpolantComputationTime, 7820 NumberOfCodeBlocks, 7715 NumberOfCodeBlocksAsserted, 164 NumberOfCheckSat, 7770 ConstructedInterpolants, 0 QuantifiedInterpolants, 13495 SizeOfPredicates, 370 NumberOfNonLiveVariables, 7996 ConjunctsInSsa, 418 ConjunctsInUnsatCore, 50 InterpolantComputations, 3 PerfectInterpolantSequences, 9574/25480 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown