/usr/bin/java -Xmx8000000000 -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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:55:00,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:55:00,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:55:00,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 16:55:00,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:55:00,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:55:00,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:55:00,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:55:00,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:55:00,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:55:00,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:55:00,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:55:00,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:55:00,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:55:00,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:55:00,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:55:00,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-09 16:55:00,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:55:00,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:55:00,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:55:00,572 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 [2021-07-09 16:55:00,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:55:00,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:55:00,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:55:00,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:55:00,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:55:00,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:55:00,595 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:55:00,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:55:00,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:55:00,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:55:00,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:55:00,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:55:00,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:55:00,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:55:00,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:55:00,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:55:00,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:55:00,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:55:00,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:55:00,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:55:00,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:55:00,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:55:00,598 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:55:00,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:55:00,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:55:00,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:55:00,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:55:00,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:55:00,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:55:00,907 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:55:00,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-07-09 16:55:00,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd2827cb/5f5ebe0d0a2a40dc8b88a01378b0fb25/FLAGd158b4824 [2021-07-09 16:55:01,548 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:55:01,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-07-09 16:55:01,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd2827cb/5f5ebe0d0a2a40dc8b88a01378b0fb25/FLAGd158b4824 [2021-07-09 16:55:01,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd2827cb/5f5ebe0d0a2a40dc8b88a01378b0fb25 [2021-07-09 16:55:01,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:55:01,968 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:55:01,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:55:01,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:55:01,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:55:01,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:55:01" (1/1) ... [2021-07-09 16:55:01,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb9494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:01, skipping insertion in model container [2021-07-09 16:55:01,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:55:01" (1/1) ... [2021-07-09 16:55:01,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:55:02,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:55:02,202 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] [2021-07-09 16:55:02,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:55:02,429 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:55:02,438 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] [2021-07-09 16:55:02,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:55:02,541 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:55:02,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02 WrapperNode [2021-07-09 16:55:02,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:55:02,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:55:02,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:55:02,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:55:02,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:55:02,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:55:02,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:55:02,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:55:02,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (1/1) ... [2021-07-09 16:55:02,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:55:02,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:55:02,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:55:02,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:55:02,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (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 [2021-07-09 16:55:02,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:55:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:55:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-09 16:55:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-07-09 16:55:02,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-07-09 16:55:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:55:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:55:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:55:02,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:55:02,675 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 16:55:03,118 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:55:03,118 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-09 16:55:03,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:55:03 BoogieIcfgContainer [2021-07-09 16:55:03,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:55:03,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:55:03,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:55:03,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:55:03,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:55:01" (1/3) ... [2021-07-09 16:55:03,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbaf23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:55:03, skipping insertion in model container [2021-07-09 16:55:03,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:02" (2/3) ... [2021-07-09 16:55:03,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbaf23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:55:03, skipping insertion in model container [2021-07-09 16:55:03,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:55:03" (3/3) ... [2021-07-09 16:55:03,129 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-07-09 16:55:03,135 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:55:03,135 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:55:03,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 16:55:03,136 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:55:03,166 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,167 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,167 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,167 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,167 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,167 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,167 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,167 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,168 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,168 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,168 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,168 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,168 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,168 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,168 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,169 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,169 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,169 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,170 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,171 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,171 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,171 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,171 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,172 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,172 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,172 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,173 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,173 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,173 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,173 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,173 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,174 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,174 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,174 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,174 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,176 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,176 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,176 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,176 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,176 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,176 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,176 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,177 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:03,184 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-07-09 16:55:03,208 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 16:55:03,232 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:55:03,232 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:55:03,233 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:55:03,233 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:55:03,233 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:55:03,233 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:55:03,233 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:55:03,233 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:55:03,247 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 94 transitions, 196 flow [2021-07-09 16:55:03,297 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:55:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:55:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 16:55:03,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:03,320 INFO L508 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] [2021-07-09 16:55:03,320 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1922949937, now seen corresponding path program 1 times [2021-07-09 16:55:03,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:03,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261189040] [2021-07-09 16:55:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:03,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:03,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261189040] [2021-07-09 16:55:03,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261189040] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:55:03,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:55:03,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 16:55:03,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878391603] [2021-07-09 16:55:03,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-09 16:55:03,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-09 16:55:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 16:55:03,620 INFO L87 Difference]: Start difference. First operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 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) [2021-07-09 16:55:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:03,642 INFO L93 Difference]: Finished difference Result 342 states and 642 transitions. [2021-07-09 16:55:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-09 16:55:03,645 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 [2021-07-09 16:55:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:03,657 INFO L225 Difference]: With dead ends: 342 [2021-07-09 16:55:03,657 INFO L226 Difference]: Without dead ends: 297 [2021-07-09 16:55:03,658 INFO L764 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 [2021-07-09 16:55:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-09 16:55:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-07-09 16:55:03,703 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) [2021-07-09 16:55:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 552 transitions. [2021-07-09 16:55:03,707 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 552 transitions. Word has length 61 [2021-07-09 16:55:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:03,707 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 552 transitions. [2021-07-09 16:55:03,707 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) [2021-07-09 16:55:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 552 transitions. [2021-07-09 16:55:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 16:55:03,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:03,710 INFO L508 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] [2021-07-09 16:55:03,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:55:03,710 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash 69507375, now seen corresponding path program 1 times [2021-07-09 16:55:03,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:03,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029110555] [2021-07-09 16:55:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:03,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:03,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029110555] [2021-07-09 16:55:03,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029110555] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:55:03,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:55:03,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:55:03,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662824246] [2021-07-09 16:55:03,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:55:03,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:55:03,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:55:03,808 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) [2021-07-09 16:55:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:03,854 INFO L93 Difference]: Finished difference Result 357 states and 672 transitions. [2021-07-09 16:55:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:55:03,855 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 [2021-07-09 16:55:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:03,861 INFO L225 Difference]: With dead ends: 357 [2021-07-09 16:55:03,861 INFO L226 Difference]: Without dead ends: 357 [2021-07-09 16:55:03,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:55:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-09 16:55:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 312. [2021-07-09 16:55:03,887 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) [2021-07-09 16:55:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 582 transitions. [2021-07-09 16:55:03,889 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 582 transitions. Word has length 61 [2021-07-09 16:55:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:03,889 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 582 transitions. [2021-07-09 16:55:03,890 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) [2021-07-09 16:55:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 582 transitions. [2021-07-09 16:55:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 16:55:03,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:03,892 INFO L508 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] [2021-07-09 16:55:03,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:55:03,892 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:03,893 INFO L82 PathProgramCache]: Analyzing trace with hash 518804448, now seen corresponding path program 1 times [2021-07-09 16:55:03,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:03,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436153532] [2021-07-09 16:55:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:04,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:04,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436153532] [2021-07-09 16:55:04,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436153532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:04,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690618739] [2021-07-09 16:55:04,043 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 [2021-07-09 16:55:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-07-09 16:55:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 16:55:04,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690618739] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:55:04,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 16:55:04,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-07-09 16:55:04,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008355946] [2021-07-09 16:55:04,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:55:04,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:04,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:55:04,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:55:04,330 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) [2021-07-09 16:55:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:04,343 INFO L93 Difference]: Finished difference Result 438 states and 834 transitions. [2021-07-09 16:55:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:55:04,344 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 [2021-07-09 16:55:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:04,346 INFO L225 Difference]: With dead ends: 438 [2021-07-09 16:55:04,346 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 16:55:04,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:55:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 16:55:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 330. [2021-07-09 16:55:04,357 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) [2021-07-09 16:55:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 618 transitions. [2021-07-09 16:55:04,359 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 618 transitions. Word has length 66 [2021-07-09 16:55:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:04,359 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 618 transitions. [2021-07-09 16:55:04,359 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) [2021-07-09 16:55:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 618 transitions. [2021-07-09 16:55:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-07-09 16:55:04,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:04,361 INFO L508 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] [2021-07-09 16:55:04,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 16:55:04,585 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash -393434949, now seen corresponding path program 1 times [2021-07-09 16:55:04,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:04,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176365777] [2021-07-09 16:55:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 16:55:04,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176365777] [2021-07-09 16:55:04,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176365777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142508294] [2021-07-09 16:55:04,666 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 [2021-07-09 16:55:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 16:55:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 16:55:05,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142508294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:05,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:05,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 16:55:05,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267108561] [2021-07-09 16:55:05,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:55:05,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:05,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:55:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:55:05,015 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) [2021-07-09 16:55:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:05,066 INFO L93 Difference]: Finished difference Result 458 states and 874 transitions. [2021-07-09 16:55:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 16:55:05,068 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 [2021-07-09 16:55:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:05,074 INFO L225 Difference]: With dead ends: 458 [2021-07-09 16:55:05,074 INFO L226 Difference]: Without dead ends: 458 [2021-07-09 16:55:05,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:55:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-09 16:55:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 410. [2021-07-09 16:55:05,095 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) [2021-07-09 16:55:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 778 transitions. [2021-07-09 16:55:05,096 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 778 transitions. Word has length 74 [2021-07-09 16:55:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:05,098 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 778 transitions. [2021-07-09 16:55:05,104 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) [2021-07-09 16:55:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 778 transitions. [2021-07-09 16:55:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-07-09 16:55:05,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:05,108 INFO L508 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] [2021-07-09 16:55:05,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:05,325 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash 402363818, now seen corresponding path program 2 times [2021-07-09 16:55:05,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:05,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483643457] [2021-07-09 16:55:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 16:55:05,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:05,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483643457] [2021-07-09 16:55:05,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483643457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:05,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919949371] [2021-07-09 16:55:05,428 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 [2021-07-09 16:55:05,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:55:05,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 16:55:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 16:55:05,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919949371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:05,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:05,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 16:55:05,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125310240] [2021-07-09 16:55:05,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:55:05,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:05,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:55:05,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:55:05,715 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) [2021-07-09 16:55:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:05,755 INFO L93 Difference]: Finished difference Result 732 states and 1422 transitions. [2021-07-09 16:55:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 16:55:05,756 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 [2021-07-09 16:55:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:05,761 INFO L225 Difference]: With dead ends: 732 [2021-07-09 16:55:05,762 INFO L226 Difference]: Without dead ends: 732 [2021-07-09 16:55:05,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:55:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-07-09 16:55:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 594. [2021-07-09 16:55:05,779 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) [2021-07-09 16:55:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1146 transitions. [2021-07-09 16:55:05,781 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1146 transitions. Word has length 79 [2021-07-09 16:55:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:05,782 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1146 transitions. [2021-07-09 16:55:05,782 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) [2021-07-09 16:55:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1146 transitions. [2021-07-09 16:55:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-07-09 16:55:05,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:05,785 INFO L508 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] [2021-07-09 16:55:06,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:06,001 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1060470651, now seen corresponding path program 3 times [2021-07-09 16:55:06,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:06,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615691469] [2021-07-09 16:55:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 16:55:06,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:06,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615691469] [2021-07-09 16:55:06,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615691469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:06,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490419874] [2021-07-09 16:55:06,105 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 [2021-07-09 16:55:06,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 16:55:06,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:55:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 16:55:06,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490419874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:06,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:06,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 16:55:06,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060203897] [2021-07-09 16:55:06,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:55:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:55:06,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:55:06,418 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) [2021-07-09 16:55:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:07,344 INFO L93 Difference]: Finished difference Result 1220 states and 2398 transitions. [2021-07-09 16:55:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 16:55:07,344 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 [2021-07-09 16:55:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:07,349 INFO L225 Difference]: With dead ends: 1220 [2021-07-09 16:55:07,350 INFO L226 Difference]: Without dead ends: 1220 [2021-07-09 16:55:07,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 16:55:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-07-09 16:55:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 938. [2021-07-09 16:55:07,375 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) [2021-07-09 16:55:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1834 transitions. [2021-07-09 16:55:07,378 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1834 transitions. Word has length 87 [2021-07-09 16:55:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:07,378 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 1834 transitions. [2021-07-09 16:55:07,379 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) [2021-07-09 16:55:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1834 transitions. [2021-07-09 16:55:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-09 16:55:07,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:07,381 INFO L508 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] [2021-07-09 16:55:07,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:07,597 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:07,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1607478993, now seen corresponding path program 4 times [2021-07-09 16:55:07,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:07,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706260013] [2021-07-09 16:55:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-09 16:55:07,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:07,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706260013] [2021-07-09 16:55:07,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706260013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:07,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464429484] [2021-07-09 16:55:07,673 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 [2021-07-09 16:55:07,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:55:07,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:07,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:55:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-09 16:55:07,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464429484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:07,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:07,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 16:55:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809817354] [2021-07-09 16:55:07,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:55:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:55:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:55:07,923 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) [2021-07-09 16:55:08,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:08,007 INFO L93 Difference]: Finished difference Result 1194 states and 2346 transitions. [2021-07-09 16:55:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:55:08,007 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 [2021-07-09 16:55:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:08,013 INFO L225 Difference]: With dead ends: 1194 [2021-07-09 16:55:08,013 INFO L226 Difference]: Without dead ends: 1194 [2021-07-09 16:55:08,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:55:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-07-09 16:55:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1098. [2021-07-09 16:55:08,058 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) [2021-07-09 16:55:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2154 transitions. [2021-07-09 16:55:08,065 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2154 transitions. Word has length 100 [2021-07-09 16:55:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:08,065 INFO L482 AbstractCegarLoop]: Abstraction has 1098 states and 2154 transitions. [2021-07-09 16:55:08,065 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) [2021-07-09 16:55:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2154 transitions. [2021-07-09 16:55:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-09 16:55:08,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:08,068 INFO L508 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] [2021-07-09 16:55:08,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 16:55:08,285 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1071562496, now seen corresponding path program 5 times [2021-07-09 16:55:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:08,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088409442] [2021-07-09 16:55:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-09 16:55:08,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:08,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088409442] [2021-07-09 16:55:08,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088409442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:08,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105877255] [2021-07-09 16:55:08,378 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 [2021-07-09 16:55:08,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 16:55:08,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:08,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:55:08,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-09 16:55:08,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105877255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:08,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:08,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:55:08,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970869479] [2021-07-09 16:55:08,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:55:08,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:08,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:55:08,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:55:08,646 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) [2021-07-09 16:55:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:08,769 INFO L93 Difference]: Finished difference Result 1354 states and 2666 transitions. [2021-07-09 16:55:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:55:08,770 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 [2021-07-09 16:55:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:08,775 INFO L225 Difference]: With dead ends: 1354 [2021-07-09 16:55:08,775 INFO L226 Difference]: Without dead ends: 1354 [2021-07-09 16:55:08,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:55:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-09 16:55:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1258. [2021-07-09 16:55:08,802 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) [2021-07-09 16:55:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2474 transitions. [2021-07-09 16:55:08,806 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2474 transitions. Word has length 105 [2021-07-09 16:55:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:08,806 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 2474 transitions. [2021-07-09 16:55:08,806 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) [2021-07-09 16:55:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2474 transitions. [2021-07-09 16:55:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-09 16:55:08,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:08,809 INFO L508 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] [2021-07-09 16:55:09,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:09,034 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1117647921, now seen corresponding path program 6 times [2021-07-09 16:55:09,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:09,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134953502] [2021-07-09 16:55:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-09 16:55:09,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:09,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134953502] [2021-07-09 16:55:09,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134953502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:09,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759234842] [2021-07-09 16:55:09,149 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 [2021-07-09 16:55:09,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 16:55:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:55:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-07-09 16:55:09,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759234842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:09,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:09,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-07-09 16:55:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761246354] [2021-07-09 16:55:09,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:55:09,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:55:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:55:09,589 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) [2021-07-09 16:55:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:13,273 INFO L93 Difference]: Finished difference Result 2158 states and 4274 transitions. [2021-07-09 16:55:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-07-09 16:55:13,274 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 [2021-07-09 16:55:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:13,282 INFO L225 Difference]: With dead ends: 2158 [2021-07-09 16:55:13,283 INFO L226 Difference]: Without dead ends: 2158 [2021-07-09 16:55:13,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16756 ImplicationChecksByTransitivity, 3251.6ms TimeCoverageRelationStatistics Valid=7859, Invalid=30361, Unknown=0, NotChecked=0, Total=38220 [2021-07-09 16:55:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-07-09 16:55:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1762. [2021-07-09 16:55:13,355 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) [2021-07-09 16:55:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3482 transitions. [2021-07-09 16:55:13,365 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3482 transitions. Word has length 110 [2021-07-09 16:55:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:13,366 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3482 transitions. [2021-07-09 16:55:13,366 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) [2021-07-09 16:55:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3482 transitions. [2021-07-09 16:55:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-07-09 16:55:13,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:13,376 INFO L508 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] [2021-07-09 16:55:13,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:13,593 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:13,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1276635771, now seen corresponding path program 7 times [2021-07-09 16:55:13,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:13,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454270834] [2021-07-09 16:55:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-09 16:55:13,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:13,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454270834] [2021-07-09 16:55:13,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454270834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:13,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048758540] [2021-07-09 16:55:13,740 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 [2021-07-09 16:55:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:55:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-09 16:55:14,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048758540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:14,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:14,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:55:14,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393076997] [2021-07-09 16:55:14,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:55:14,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:14,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:55:14,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:55:14,015 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) [2021-07-09 16:55:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:14,187 INFO L93 Difference]: Finished difference Result 2082 states and 4122 transitions. [2021-07-09 16:55:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:55:14,188 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 [2021-07-09 16:55:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:14,195 INFO L225 Difference]: With dead ends: 2082 [2021-07-09 16:55:14,196 INFO L226 Difference]: Without dead ends: 2082 [2021-07-09 16:55:14,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:55:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-07-09 16:55:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1962. [2021-07-09 16:55:14,230 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) [2021-07-09 16:55:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3882 transitions. [2021-07-09 16:55:14,236 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3882 transitions. Word has length 123 [2021-07-09 16:55:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:14,236 INFO L482 AbstractCegarLoop]: Abstraction has 1962 states and 3882 transitions. [2021-07-09 16:55:14,237 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) [2021-07-09 16:55:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3882 transitions. [2021-07-09 16:55:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-07-09 16:55:14,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:14,242 INFO L508 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] [2021-07-09 16:55:14,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 16:55:14,465 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1626379628, now seen corresponding path program 8 times [2021-07-09 16:55:14,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:14,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731865566] [2021-07-09 16:55:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-09 16:55:14,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731865566] [2021-07-09 16:55:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731865566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698046176] [2021-07-09 16:55:14,621 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 [2021-07-09 16:55:14,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:55:14,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:14,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:55:14,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-09 16:55:14,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698046176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:14,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:14,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:55:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040321880] [2021-07-09 16:55:14,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:55:14,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:55:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:55:14,911 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) [2021-07-09 16:55:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:15,115 INFO L93 Difference]: Finished difference Result 2282 states and 4522 transitions. [2021-07-09 16:55:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:55:15,115 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 [2021-07-09 16:55:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:15,123 INFO L225 Difference]: With dead ends: 2282 [2021-07-09 16:55:15,124 INFO L226 Difference]: Without dead ends: 2282 [2021-07-09 16:55:15,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:55:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-07-09 16:55:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2162. [2021-07-09 16:55:15,162 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) [2021-07-09 16:55:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 4282 transitions. [2021-07-09 16:55:15,168 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 4282 transitions. Word has length 128 [2021-07-09 16:55:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:15,168 INFO L482 AbstractCegarLoop]: Abstraction has 2162 states and 4282 transitions. [2021-07-09 16:55:15,169 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) [2021-07-09 16:55:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 4282 transitions. [2021-07-09 16:55:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-07-09 16:55:15,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:15,174 INFO L508 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] [2021-07-09 16:55:15,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:15,399 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1177688347, now seen corresponding path program 9 times [2021-07-09 16:55:15,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:15,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480209692] [2021-07-09 16:55:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-09 16:55:15,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:15,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480209692] [2021-07-09 16:55:15,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480209692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:15,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952513103] [2021-07-09 16:55:15,589 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 [2021-07-09 16:55:15,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 16:55:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:55:15,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-07-09 16:55:15,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952513103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:15,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:15,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-07-09 16:55:15,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34151104] [2021-07-09 16:55:15,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 16:55:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 16:55:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:55:15,996 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) [2021-07-09 16:55:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:25,988 INFO L93 Difference]: Finished difference Result 3336 states and 6630 transitions. [2021-07-09 16:55:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 365 states. [2021-07-09 16:55:25,989 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 [2021-07-09 16:55:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:25,999 INFO L225 Difference]: With dead ends: 3336 [2021-07-09 16:55:25,999 INFO L226 Difference]: Without dead ends: 3336 [2021-07-09 16:55:26,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66570 ImplicationChecksByTransitivity, 9254.4ms TimeCoverageRelationStatistics Valid=27129, Invalid=114623, Unknown=0, NotChecked=0, Total=141752 [2021-07-09 16:55:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-07-09 16:55:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2826. [2021-07-09 16:55:26,076 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) [2021-07-09 16:55:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 5610 transitions. [2021-07-09 16:55:26,084 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 5610 transitions. Word has length 133 [2021-07-09 16:55:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:26,084 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 5610 transitions. [2021-07-09 16:55:26,084 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) [2021-07-09 16:55:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 5610 transitions. [2021-07-09 16:55:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-07-09 16:55:26,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:26,091 INFO L508 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] [2021-07-09 16:55:26,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:26,305 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 556479399, now seen corresponding path program 10 times [2021-07-09 16:55:26,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:26,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688916718] [2021-07-09 16:55:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-07-09 16:55:26,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688916718] [2021-07-09 16:55:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688916718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636187206] [2021-07-09 16:55:26,497 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 [2021-07-09 16:55:26,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:55:26,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:55:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-07-09 16:55:26,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636187206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:26,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:26,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 16:55:26,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670634610] [2021-07-09 16:55:26,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 16:55:26,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 16:55:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:55:26,852 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) [2021-07-09 16:55:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:27,140 INFO L93 Difference]: Finished difference Result 3210 states and 6378 transitions. [2021-07-09 16:55:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:55:27,140 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 [2021-07-09 16:55:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:27,150 INFO L225 Difference]: With dead ends: 3210 [2021-07-09 16:55:27,150 INFO L226 Difference]: Without dead ends: 3210 [2021-07-09 16:55:27,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:55:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-07-09 16:55:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3066. [2021-07-09 16:55:27,202 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) [2021-07-09 16:55:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 6090 transitions. [2021-07-09 16:55:27,210 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 6090 transitions. Word has length 146 [2021-07-09 16:55:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:27,211 INFO L482 AbstractCegarLoop]: Abstraction has 3066 states and 6090 transitions. [2021-07-09 16:55:27,211 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) [2021-07-09 16:55:27,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 6090 transitions. [2021-07-09 16:55:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-07-09 16:55:27,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:27,219 INFO L508 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] [2021-07-09 16:55:27,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 16:55:27,446 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1605028246, now seen corresponding path program 11 times [2021-07-09 16:55:27,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:27,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066276397] [2021-07-09 16:55:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-07-09 16:55:27,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:27,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066276397] [2021-07-09 16:55:27,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066276397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:27,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302831725] [2021-07-09 16:55:27,657 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 [2021-07-09 16:55:27,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:55:27,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:55:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-07-09 16:55:28,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302831725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:28,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:28,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-07-09 16:55:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403514256] [2021-07-09 16:55:28,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 16:55:28,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:28,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 16:55:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:55:28,117 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) [2021-07-09 16:55:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:46,975 INFO L93 Difference]: Finished difference Result 4444 states and 8846 transitions. [2021-07-09 16:55:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-07-09 16:55:46,975 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 [2021-07-09 16:55:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:46,990 INFO L225 Difference]: With dead ends: 4444 [2021-07-09 16:55:46,990 INFO L226 Difference]: Without dead ends: 4444 [2021-07-09 16:55:47,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151458 ImplicationChecksByTransitivity, 17830.8ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-07-09 16:55:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-07-09 16:55:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 3850. [2021-07-09 16:55:47,057 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) [2021-07-09 16:55:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 7658 transitions. [2021-07-09 16:55:47,066 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 7658 transitions. Word has length 151 [2021-07-09 16:55:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:47,066 INFO L482 AbstractCegarLoop]: Abstraction has 3850 states and 7658 transitions. [2021-07-09 16:55:47,066 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) [2021-07-09 16:55:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 7658 transitions. [2021-07-09 16:55:47,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-07-09 16:55:47,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:47,075 INFO L508 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] [2021-07-09 16:55:47,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 16:55:47,289 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1225339166, now seen corresponding path program 12 times [2021-07-09 16:55:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:47,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463160009] [2021-07-09 16:55:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-07-09 16:55:47,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:47,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463160009] [2021-07-09 16:55:47,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463160009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:47,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336018975] [2021-07-09 16:55:47,576 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 [2021-07-09 16:55:47,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 16:55:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:55:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-07-09 16:55:48,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336018975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:48,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:48,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-07-09 16:55:48,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554812868] [2021-07-09 16:55:48,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 16:55:48,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:48,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 16:55:48,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:55:48,075 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) [2021-07-09 16:56:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:56:17,612 INFO L93 Difference]: Finished difference Result 5362 states and 10682 transitions. [2021-07-09 16:56:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 701 states. [2021-07-09 16:56:17,613 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 [2021-07-09 16:56:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:56:17,621 INFO L225 Difference]: With dead ends: 5362 [2021-07-09 16:56:17,622 INFO L226 Difference]: Without dead ends: 5362 [2021-07-09 16:56:17,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 716 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253004 ImplicationChecksByTransitivity, 27996.4ms TimeCoverageRelationStatistics Valid=92780, Invalid=422026, Unknown=0, NotChecked=0, Total=514806 [2021-07-09 16:56:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2021-07-09 16:56:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4714. [2021-07-09 16:56:17,694 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) [2021-07-09 16:56:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 9386 transitions. [2021-07-09 16:56:17,705 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 9386 transitions. Word has length 164 [2021-07-09 16:56:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:56:17,705 INFO L482 AbstractCegarLoop]: Abstraction has 4714 states and 9386 transitions. [2021-07-09 16:56:17,706 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) [2021-07-09 16:56:17,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 9386 transitions. [2021-07-09 16:56:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-07-09 16:56:17,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:56:17,716 INFO L508 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] [2021-07-09 16:56:17,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 16:56:17,933 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:56:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:56:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1616708884, now seen corresponding path program 13 times [2021-07-09 16:56:17,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:56:17,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335944176] [2021-07-09 16:56:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:56:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:56:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-09 16:56:18,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:56:18,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335944176] [2021-07-09 16:56:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335944176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:18,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354024685] [2021-07-09 16:56:18,182 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 [2021-07-09 16:56:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:56:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:56:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:56:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-09 16:56:18,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354024685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:18,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:56:18,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-09 16:56:18,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786514780] [2021-07-09 16:56:18,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 16:56:18,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:56:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 16:56:18,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:56:18,483 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) [2021-07-09 16:56:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:56:18,860 INFO L93 Difference]: Finished difference Result 5226 states and 10410 transitions. [2021-07-09 16:56:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:56:18,860 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 [2021-07-09 16:56:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:56:18,871 INFO L225 Difference]: With dead ends: 5226 [2021-07-09 16:56:18,871 INFO L226 Difference]: Without dead ends: 5226 [2021-07-09 16:56:18,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 16:56:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-07-09 16:56:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5034. [2021-07-09 16:56:18,934 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) [2021-07-09 16:56:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 10026 transitions. [2021-07-09 16:56:18,944 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 10026 transitions. Word has length 177 [2021-07-09 16:56:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:56:18,944 INFO L482 AbstractCegarLoop]: Abstraction has 5034 states and 10026 transitions. [2021-07-09 16:56:18,944 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) [2021-07-09 16:56:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 10026 transitions. [2021-07-09 16:56:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-07-09 16:56:18,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:56:18,955 INFO L508 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] [2021-07-09 16:56:19,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:56:19,169 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:56:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:56:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1954781411, now seen corresponding path program 14 times [2021-07-09 16:56:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:56:19,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265149626] [2021-07-09 16:56:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:56:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:56:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-09 16:56:19,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:56:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265149626] [2021-07-09 16:56:19,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265149626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321852758] [2021-07-09 16:56:19,641 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 [2021-07-09 16:56:19,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:56:19,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:56:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 16:56:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:56:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-09 16:56:19,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321852758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:19,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:56:19,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-07-09 16:56:19,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986881175] [2021-07-09 16:56:19,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 16:56:19,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:56:19,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 16:56:19,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:56:19,981 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) [2021-07-09 16:56:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:56:20,461 INFO L93 Difference]: Finished difference Result 5546 states and 11050 transitions. [2021-07-09 16:56:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 16:56:20,462 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 [2021-07-09 16:56:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:56:20,473 INFO L225 Difference]: With dead ends: 5546 [2021-07-09 16:56:20,473 INFO L226 Difference]: Without dead ends: 5546 [2021-07-09 16:56:20,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 16:56:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-07-09 16:56:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5354. [2021-07-09 16:56:20,552 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) [2021-07-09 16:56:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 10666 transitions. [2021-07-09 16:56:20,567 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 10666 transitions. Word has length 182 [2021-07-09 16:56:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:56:20,568 INFO L482 AbstractCegarLoop]: Abstraction has 5354 states and 10666 transitions. [2021-07-09 16:56:20,568 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) [2021-07-09 16:56:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 10666 transitions. [2021-07-09 16:56:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-07-09 16:56:20,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:56:20,581 INFO L508 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] [2021-07-09 16:56:20,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 16:56:20,809 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:56:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:56:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1102843508, now seen corresponding path program 15 times [2021-07-09 16:56:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:56:20,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294779333] [2021-07-09 16:56:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:56:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:56:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-09 16:56:21,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:56:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294779333] [2021-07-09 16:56:21,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294779333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106209115] [2021-07-09 16:56:21,140 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 [2021-07-09 16:56:21,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:56:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:56:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:56:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:56:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-07-09 16:56:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106209115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:21,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:56:21,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 46 [2021-07-09 16:56:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187106534] [2021-07-09 16:56:21,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 16:56:21,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:56:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 16:56:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:56:21,730 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) [2021-07-09 16:57:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:57:20,758 INFO L93 Difference]: Finished difference Result 7140 states and 14238 transitions. [2021-07-09 16:57:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2021-07-09 16:57:20,758 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 [2021-07-09 16:57:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:57:20,770 INFO L225 Difference]: With dead ends: 7140 [2021-07-09 16:57:20,771 INFO L226 Difference]: Without dead ends: 7140 [2021-07-09 16:57:20,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2193 GetRequests, 1161 SyntacticMatches, 0 SemanticMatches, 1032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534325 ImplicationChecksByTransitivity, 56061.9ms TimeCoverageRelationStatistics Valid=187686, Invalid=880436, Unknown=0, NotChecked=0, Total=1068122 [2021-07-09 16:57:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-07-09 16:57:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 6378. [2021-07-09 16:57:20,917 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) [2021-07-09 16:57:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 12714 transitions. [2021-07-09 16:57:20,930 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 12714 transitions. Word has length 187 [2021-07-09 16:57:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:57:20,930 INFO L482 AbstractCegarLoop]: Abstraction has 6378 states and 12714 transitions. [2021-07-09 16:57:20,930 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) [2021-07-09 16:57:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 12714 transitions. [2021-07-09 16:57:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-07-09 16:57:20,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:57:20,943 INFO L508 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] [2021-07-09 16:57:21,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 16:57:21,168 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:57:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:57:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash 493157464, now seen corresponding path program 16 times [2021-07-09 16:57:21,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:57:21,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117466533] [2021-07-09 16:57:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:57:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:57:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-07-09 16:57:21,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:57:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117466533] [2021-07-09 16:57:21,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117466533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619831705] [2021-07-09 16:57:21,590 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 [2021-07-09 16:57:21,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:57:21,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:57:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 16:57:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:57:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-07-09 16:57:21,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619831705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:21,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:57:21,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-07-09 16:57:21,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776061535] [2021-07-09 16:57:21,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 16:57:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:57:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 16:57:21,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:57:21,949 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) [2021-07-09 16:57:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:57:22,714 INFO L93 Difference]: Finished difference Result 6954 states and 13866 transitions. [2021-07-09 16:57:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 16:57:22,715 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 [2021-07-09 16:57:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:57:22,731 INFO L225 Difference]: With dead ends: 6954 [2021-07-09 16:57:22,731 INFO L226 Difference]: Without dead ends: 6954 [2021-07-09 16:57:22,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 902.2ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 16:57:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2021-07-09 16:57:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 6738. [2021-07-09 16:57:22,823 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) [2021-07-09 16:57:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 13434 transitions. [2021-07-09 16:57:22,836 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 13434 transitions. Word has length 200 [2021-07-09 16:57:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:57:22,836 INFO L482 AbstractCegarLoop]: Abstraction has 6738 states and 13434 transitions. [2021-07-09 16:57:22,836 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) [2021-07-09 16:57:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 13434 transitions. [2021-07-09 16:57:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-07-09 16:57:22,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:57:22,851 INFO L508 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] [2021-07-09 16:57:23,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:57:23,076 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:57:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:57:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash -771856121, now seen corresponding path program 17 times [2021-07-09 16:57:23,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:57:23,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161504567] [2021-07-09 16:57:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:57:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:57:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-07-09 16:57:23,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:57:23,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161504567] [2021-07-09 16:57:23,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161504567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:23,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570381458] [2021-07-09 16:57:23,538 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 [2021-07-09 16:57:23,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-09 16:57:23,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:57:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:57:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:57:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-07-09 16:57:24,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570381458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:24,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:57:24,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 19] total 52 [2021-07-09 16:57:24,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790259322] [2021-07-09 16:57:24,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-09 16:57:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:57:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-09 16:57:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 16:57:24,163 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) [2021-07-09 16:59:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:59:01,083 INFO L93 Difference]: Finished difference Result 8728 states and 17414 transitions. [2021-07-09 16:59:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1301 states. [2021-07-09 16:59:01,083 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 [2021-07-09 16:59:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:59:01,097 INFO L225 Difference]: With dead ends: 8728 [2021-07-09 16:59:01,097 INFO L226 Difference]: Without dead ends: 8728 [2021-07-09 16:59:01,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2785 GetRequests, 1462 SyntacticMatches, 0 SemanticMatches, 1323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886582 ImplicationChecksByTransitivity, 91914.3ms TimeCoverageRelationStatistics Valid=303321, Invalid=1450979, Unknown=0, NotChecked=0, Total=1754300 [2021-07-09 16:59:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-07-09 16:59:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 7882. [2021-07-09 16:59:01,313 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) [2021-07-09 16:59:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 15722 transitions. [2021-07-09 16:59:01,328 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 15722 transitions. Word has length 205 [2021-07-09 16:59:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:59:01,329 INFO L482 AbstractCegarLoop]: Abstraction has 7882 states and 15722 transitions. [2021-07-09 16:59:01,329 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) [2021-07-09 16:59:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 15722 transitions. [2021-07-09 16:59:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-07-09 16:59:01,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:59:01,357 INFO L508 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] [2021-07-09 16:59:01,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:59:01,573 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:59:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:59:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash -522613101, now seen corresponding path program 18 times [2021-07-09 16:59:01,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:59:01,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577987889] [2021-07-09 16:59:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:59:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:59:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-07-09 16:59:02,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:59:02,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577987889] [2021-07-09 16:59:02,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577987889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:59:02,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660626713] [2021-07-09 16:59:02,028 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 [2021-07-09 16:59:02,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-09 16:59:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:59:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:59:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:59:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-07-09 16:59:02,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660626713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:59:02,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:59:02,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2021-07-09 16:59:02,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755198355] [2021-07-09 16:59:02,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-07-09 16:59:02,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:59:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-07-09 16:59:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2601, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 16:59:02,784 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) [2021-07-09 17:01:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:01:20,231 INFO L93 Difference]: Finished difference Result 10006 states and 19970 transitions. [2021-07-09 17:01:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1538 states. [2021-07-09 17:01:20,231 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 [2021-07-09 17:01:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:01:20,244 INFO L225 Difference]: With dead ends: 10006 [2021-07-09 17:01:20,244 INFO L226 Difference]: Without dead ends: 10006 [2021-07-09 17:01:20,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3270 GetRequests, 1708 SyntacticMatches, 0 SemanticMatches, 1562 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243135 ImplicationChecksByTransitivity, 129091.7ms TimeCoverageRelationStatistics Valid=418136, Invalid=2026396, Unknown=0, NotChecked=0, Total=2444532 [2021-07-09 17:01:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2021-07-09 17:01:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 9106. [2021-07-09 17:01:20,626 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) [2021-07-09 17:01:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9106 states to 9106 states and 18170 transitions. [2021-07-09 17:01:20,643 INFO L78 Accepts]: Start accepts. Automaton has 9106 states and 18170 transitions. Word has length 218 [2021-07-09 17:01:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:01:20,643 INFO L482 AbstractCegarLoop]: Abstraction has 9106 states and 18170 transitions. [2021-07-09 17:01:20,643 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) [2021-07-09 17:01:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9106 states and 18170 transitions. [2021-07-09 17:01:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-07-09 17:01:20,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:01:20,663 INFO L508 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] [2021-07-09 17:01:20,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:01:20,879 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:01:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:01:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1286709155, now seen corresponding path program 19 times [2021-07-09 17:01:20,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:01:20,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387070599] [2021-07-09 17:01:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:01:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:01:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-09 17:01:21,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:01:21,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387070599] [2021-07-09 17:01:21,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387070599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874966709] [2021-07-09 17:01:21,479 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 [2021-07-09 17:01:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:01:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:01:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:01:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-09 17:01:21,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874966709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:21,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:01:21,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-07-09 17:01:21,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821675914] [2021-07-09 17:01:21,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 17:01:21,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:01:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 17:01:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:01:21,857 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) [2021-07-09 17:01:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:01:22,695 INFO L93 Difference]: Finished difference Result 9810 states and 19578 transitions. [2021-07-09 17:01:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 17:01:22,696 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 [2021-07-09 17:01:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:01:22,708 INFO L225 Difference]: With dead ends: 9810 [2021-07-09 17:01:22,708 INFO L226 Difference]: Without dead ends: 9810 [2021-07-09 17:01:22,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1071.9ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 17:01:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-09 17:01:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 9546. [2021-07-09 17:01:22,810 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) [2021-07-09 17:01:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9546 states to 9546 states and 19050 transitions. [2021-07-09 17:01:22,829 INFO L78 Accepts]: Start accepts. Automaton has 9546 states and 19050 transitions. Word has length 231 [2021-07-09 17:01:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:01:22,829 INFO L482 AbstractCegarLoop]: Abstraction has 9546 states and 19050 transitions. [2021-07-09 17:01:22,829 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) [2021-07-09 17:01:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9546 states and 19050 transitions. [2021-07-09 17:01:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-07-09 17:01:22,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:01:22,841 INFO L508 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] [2021-07-09 17:01:23,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:01:23,045 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:01:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:01:23,045 INFO L82 PathProgramCache]: Analyzing trace with hash 528686542, now seen corresponding path program 20 times [2021-07-09 17:01:23,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:01:23,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128378089] [2021-07-09 17:01:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:01:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:01:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-09 17:01:23,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:01:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128378089] [2021-07-09 17:01:23,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128378089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250733715] [2021-07-09 17:01:23,636 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 [2021-07-09 17:01:23,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:01:23,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:01:23,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:01:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:01:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-09 17:01:24,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250733715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:24,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:01:24,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-07-09 17:01:24,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249995703] [2021-07-09 17:01:24,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 17:01:24,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:01:24,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 17:01:24,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:01:24,014 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) [2021-07-09 17:01:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:01:24,967 INFO L93 Difference]: Finished difference Result 9986 states and 19930 transitions. [2021-07-09 17:01:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:01:24,967 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 [2021-07-09 17:01:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:01:24,978 INFO L225 Difference]: With dead ends: 9986 [2021-07-09 17:01:24,978 INFO L226 Difference]: Without dead ends: 9986 [2021-07-09 17:01:24,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1071.9ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 17:01:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-07-09 17:01:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9986. [2021-07-09 17:01:25,077 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) [2021-07-09 17:01:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 19930 transitions. [2021-07-09 17:01:25,098 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 19930 transitions. Word has length 236 [2021-07-09 17:01:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:01:25,098 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 19930 transitions. [2021-07-09 17:01:25,098 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) [2021-07-09 17:01:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 19930 transitions. [2021-07-09 17:01:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-07-09 17:01:25,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:01:25,110 INFO L508 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] [2021-07-09 17:01:25,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:01:25,311 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:01:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:01:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2022711037, now seen corresponding path program 21 times [2021-07-09 17:01:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:01:25,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177530980] [2021-07-09 17:01:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:01:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:01:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 1340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:01:26,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:01:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177530980] [2021-07-09 17:01:26,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177530980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:26,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594125933] [2021-07-09 17:01:26,103 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 [2021-07-09 17:01:26,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:01:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:01:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:01:26,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:01:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-07-09 17:01:26,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594125933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:26,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:01:26,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2021-07-09 17:01:26,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392945413] [2021-07-09 17:01:26,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-07-09 17:01:26,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:01:26,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-07-09 17:01:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3671, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 17:01:26,966 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) [2021-07-09 17:02:34,683 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 17:02:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:02:37,273 INFO L93 Difference]: Finished difference Result 170472 states and 340902 transitions. [2021-07-09 17:02:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1102 states. [2021-07-09 17:02:37,273 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 [2021-07-09 17:02:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:02:37,778 INFO L225 Difference]: With dead ends: 170472 [2021-07-09 17:02:37,779 INFO L226 Difference]: Without dead ends: 170472 [2021-07-09 17:02:37,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2400 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 1123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635937 ImplicationChecksByTransitivity, 58692.9ms TimeCoverageRelationStatistics Valid=255553, Invalid=1008947, Unknown=0, NotChecked=0, Total=1264500 [2021-07-09 17:02:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170472 states. [2021-07-09 17:02:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170472 to 10890. [2021-07-09 17:02:38,955 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) [2021-07-09 17:02:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10890 states to 10890 states and 21738 transitions. [2021-07-09 17:02:38,969 INFO L78 Accepts]: Start accepts. Automaton has 10890 states and 21738 transitions. Word has length 241 [2021-07-09 17:02:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:02:38,969 INFO L482 AbstractCegarLoop]: Abstraction has 10890 states and 21738 transitions. [2021-07-09 17:02:38,970 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) [2021-07-09 17:02:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10890 states and 21738 transitions. [2021-07-09 17:02:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-07-09 17:02:38,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:02:38,982 INFO L508 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] [2021-07-09 17:02:39,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:02:39,183 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:02:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:02:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash -17430824, now seen corresponding path program 22 times [2021-07-09 17:02:39,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:02:39,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817495333] [2021-07-09 17:02:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:02:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:02:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 1421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:02:39,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:02:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817495333] [2021-07-09 17:02:39,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817495333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:02:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059476613] [2021-07-09 17:02:39,930 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 [2021-07-09 17:02:40,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:02:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:02:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:02:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:02:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-07-09 17:02:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059476613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:02:40,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:02:40,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25] total 71 [2021-07-09 17:02:40,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852160427] [2021-07-09 17:02:40,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 17:02:40,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:02:40,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 17:02:40,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=4148, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:02:40,959 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) [2021-07-09 17:04:15,527 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 17:04:20,494 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 17:04:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:04:27,919 INFO L93 Difference]: Finished difference Result 211585 states and 423128 transitions. [2021-07-09 17:04:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1363 states. [2021-07-09 17:04:27,919 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 [2021-07-09 17:04:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:04:28,382 INFO L225 Difference]: With dead ends: 211585 [2021-07-09 17:04:28,382 INFO L226 Difference]: Without dead ends: 211585 [2021-07-09 17:04:28,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2928 GetRequests, 1542 SyntacticMatches, 0 SemanticMatches, 1386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983344 ImplicationChecksByTransitivity, 88173.4ms TimeCoverageRelationStatistics Valid=390931, Invalid=1534225, Unknown=0, NotChecked=0, Total=1925156 [2021-07-09 17:04:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211585 states. [2021-07-09 17:04:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211585 to 11794. [2021-07-09 17:04:30,067 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) [2021-07-09 17:04:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 23546 transitions. [2021-07-09 17:04:30,084 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 23546 transitions. Word has length 249 [2021-07-09 17:04:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:04:30,084 INFO L482 AbstractCegarLoop]: Abstraction has 11794 states and 23546 transitions. [2021-07-09 17:04:30,084 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) [2021-07-09 17:04:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 23546 transitions. [2021-07-09 17:04:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-07-09 17:04:30,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:04:30,101 INFO L508 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] [2021-07-09 17:04:30,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:04:30,308 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:04:30,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:04:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash -418389069, now seen corresponding path program 23 times [2021-07-09 17:04:30,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:04:30,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945166190] [2021-07-09 17:04:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:04:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:04:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:04:31,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:04:31,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945166190] [2021-07-09 17:04:31,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945166190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:04:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968820492] [2021-07-09 17:04:31,192 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 [2021-07-09 17:04:31,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-07-09 17:04:31,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:04:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:04:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:04:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-07-09 17:04:32,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968820492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:04:32,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:04:32,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-07-09 17:04:32,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333415381] [2021-07-09 17:04:32,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-09 17:04:32,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:04:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-09 17:04:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4653, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 17:04:32,310 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) Received shutdown request... [2021-07-09 17:06:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1237 states. [2021-07-09 17:06:21,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:06:21,085 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:06:21,086 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:06:21,088 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:06:21,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:06:21 BasicIcfg [2021-07-09 17:06:21,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:06:21,088 INFO L168 Benchmark]: Toolchain (without parser) took 679120.47 ms. Allocated memory was 194.0 MB in the beginning and 5.6 GB in the end (delta: 5.4 GB). Free memory was 155.9 MB in the beginning and 2.9 GB in the end (delta: -2.7 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. [2021-07-09 17:06:21,089 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 194.0 MB. Free memory is still 175.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:06:21,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 568.80 ms. Allocated memory is still 194.0 MB. Free memory was 155.6 MB in the beginning and 149.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:06:21,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.66 ms. Allocated memory is still 194.0 MB. Free memory was 149.6 MB in the beginning and 147.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:06:21,089 INFO L168 Benchmark]: Boogie Preprocessor took 21.41 ms. Allocated memory is still 194.0 MB. Free memory was 147.5 MB in the beginning and 145.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:06:21,089 INFO L168 Benchmark]: RCFGBuilder took 516.23 ms. Allocated memory is still 194.0 MB. Free memory was 145.9 MB in the beginning and 118.1 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-07-09 17:06:21,089 INFO L168 Benchmark]: TraceAbstraction took 677964.78 ms. Allocated memory was 194.0 MB in the beginning and 5.6 GB in the end (delta: 5.4 GB). Free memory was 118.1 MB in the beginning and 2.9 GB in the end (delta: -2.8 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. [2021-07-09 17:06:21,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 194.0 MB. Free memory is still 175.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 568.80 ms. Allocated memory is still 194.0 MB. Free memory was 155.6 MB in the beginning and 149.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.66 ms. Allocated memory is still 194.0 MB. Free memory was 149.6 MB in the beginning and 147.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.41 ms. Allocated memory is still 194.0 MB. Free memory was 147.5 MB in the beginning and 145.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 516.23 ms. Allocated memory is still 194.0 MB. Free memory was 145.9 MB in the beginning and 118.1 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 677964.78 ms. Allocated memory was 194.0 MB in the beginning and 5.6 GB in the end (delta: 5.4 GB). Free memory was 118.1 MB in the beginning and 2.9 GB in the end (delta: -2.8 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 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 1237 states, 75 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1286 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 104 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 677855.0ms, OverallIterations: 26, TraceHistogramMax: 20, EmptinessCheckTime: 243.0ms, AutomataDifference: 647936.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2755 SDtfs, 199821 SDslu, 29579 SDs, 0 SdLazy, 6853 SolverSat, 32930 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13639.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23133 GetRequests, 13039 SyntacticMatches, 0 SemanticMatches, 10093 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5633950 ImplicationChecksByTransitivity, 581403.3ms 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: 4341.3ms AutomataMinimizationTime, 25 MinimizatonAttempts, 366090 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 545.5ms SsaConstructionTime, 1864.8ms SatisfiabilityAnalysisTime, 15673.1ms 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