/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 18:09:12,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 18:09:12,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 18:09:12,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 18:09:12,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 18:09:12,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 18:09:12,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 18:09:12,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 18:09:12,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 18:09:12,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 18:09:12,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 18:09:12,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 18:09:12,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 18:09:12,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 18:09:12,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 18:09:12,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 18:09:12,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 18:09:12,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 18:09:12,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 18:09:12,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 18:09:12,603 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 [2021-03-10 18:09:12,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 18:09:12,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 18:09:12,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 18:09:12,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 18:09:12,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 18:09:12,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 18:09:12,632 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 18:09:12,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 18:09:12,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 18:09:12,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 18:09:12,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 18:09:12,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 18:09:12,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 18:09:12,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 18:09:12,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 18:09:12,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 18:09:12,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 18:09:12,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 18:09:12,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 18:09:12,876 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 18:09:12,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-03-10 18:09:12,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b66582f/e4065a36192940e198a42057a51cae0e/FLAGbf1ab8ff1 [2021-03-10 18:09:13,367 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 18:09:13,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-03-10 18:09:13,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b66582f/e4065a36192940e198a42057a51cae0e/FLAGbf1ab8ff1 [2021-03-10 18:09:13,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b66582f/e4065a36192940e198a42057a51cae0e [2021-03-10 18:09:13,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 18:09:13,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 18:09:13,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 18:09:13,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 18:09:13,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 18:09:13,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 06:09:13" (1/1) ... [2021-03-10 18:09:13,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af6c1d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:13, skipping insertion in model container [2021-03-10 18:09:13,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 06:09:13" (1/1) ... [2021-03-10 18:09:13,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 18:09:13,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 18:09:13,851 WARN L226 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-1.i[820,833] [2021-03-10 18:09:14,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 18:09:14,082 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 18:09:14,089 WARN L226 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-1.i[820,833] [2021-03-10 18:09:14,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 18:09:14,232 INFO L208 MainTranslator]: Completed translation [2021-03-10 18:09:14,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14 WrapperNode [2021-03-10 18:09:14,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 18:09:14,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 18:09:14,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 18:09:14,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 18:09:14,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 18:09:14,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 18:09:14,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 18:09:14,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 18:09:14,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (1/1) ... [2021-03-10 18:09:14,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 18:09:14,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 18:09:14,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 18:09:14,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 18:09:14,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (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 [2021-03-10 18:09:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 18:09:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 18:09:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-03-10 18:09:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 18:09:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-03-10 18:09:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-03-10 18:09:14,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-03-10 18:09:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 18:09:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 18:09:14,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 18:09:14,479 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 18:09:15,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 18:09:15,198 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-10 18:09:15,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 06:09:15 BoogieIcfgContainer [2021-03-10 18:09:15,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 18:09:15,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 18:09:15,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 18:09:15,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 18:09:15,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 06:09:13" (1/3) ... [2021-03-10 18:09:15,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bbd6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 06:09:15, skipping insertion in model container [2021-03-10 18:09:15,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 06:09:14" (2/3) ... [2021-03-10 18:09:15,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bbd6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 06:09:15, skipping insertion in model container [2021-03-10 18:09:15,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 06:09:15" (3/3) ... [2021-03-10 18:09:15,203 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-03-10 18:09:15,206 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 18:09:15,206 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 18:09:15,212 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 18:09:15,212 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 18:09:15,226 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,227 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,227 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,227 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,227 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,227 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,227 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,227 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,228 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,228 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,228 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,228 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,228 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,228 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,228 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,229 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,230 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,230 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,230 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,230 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,230 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,230 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,230 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,231 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,232 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,232 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,232 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,232 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,232 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,232 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,233 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,234 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,234 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,234 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,234 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,240 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,241 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,241 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,241 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 18:09:15,248 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-10 18:09:15,258 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-10 18:09:15,281 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 18:09:15,281 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 18:09:15,281 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 18:09:15,281 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 18:09:15,281 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 18:09:15,281 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 18:09:15,282 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 18:09:15,282 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 18:09:15,292 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 83 places, 86 transitions, 180 flow [2021-03-10 18:09:15,323 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 317 states, 315 states have (on average 2.0317460317460316) internal successors, (640), 316 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 317 states, 315 states have (on average 2.0317460317460316) internal successors, (640), 316 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 18:09:15,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:15,334 INFO L519 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] [2021-03-10 18:09:15,334 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -638211894, now seen corresponding path program 1 times [2021-03-10 18:09:15,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:15,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21785143] [2021-03-10 18:09:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:09:15,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21785143] [2021-03-10 18:09:15,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 18:09:15,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 18:09:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469676189] [2021-03-10 18:09:15,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-10 18:09:15,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-10 18:09:15,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-10 18:09:15,490 INFO L87 Difference]: Start difference. First operand has 317 states, 315 states have (on average 2.0317460317460316) internal successors, (640), 316 states have internal predecessors, (640), 0 states have call successors, (0), 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 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:15,514 INFO L93 Difference]: Finished difference Result 309 states and 579 transitions. [2021-03-10 18:09:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-10 18:09:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 18:09:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:15,527 INFO L225 Difference]: With dead ends: 309 [2021-03-10 18:09:15,528 INFO L226 Difference]: Without dead ends: 272 [2021-03-10 18:09:15,528 INFO L775 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 [2021-03-10 18:09:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-03-10 18:09:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-03-10 18:09:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.867158671586716) internal successors, (506), 271 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 506 transitions. [2021-03-10 18:09:15,580 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 506 transitions. Word has length 50 [2021-03-10 18:09:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:15,582 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 506 transitions. [2021-03-10 18:09:15,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 506 transitions. [2021-03-10 18:09:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 18:09:15,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:15,588 INFO L519 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] [2021-03-10 18:09:15,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 18:09:15,588 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1081853556, now seen corresponding path program 1 times [2021-03-10 18:09:15,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:15,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539170573] [2021-03-10 18:09:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:09:15,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539170573] [2021-03-10 18:09:15,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 18:09:15,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 18:09:15,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194585886] [2021-03-10 18:09:15,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 18:09:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 18:09:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 18:09:15,680 INFO L87 Difference]: Start difference. First operand 272 states and 506 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:15,693 INFO L93 Difference]: Finished difference Result 398 states and 758 transitions. [2021-03-10 18:09:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 18:09:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 18:09:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:15,694 INFO L225 Difference]: With dead ends: 398 [2021-03-10 18:09:15,695 INFO L226 Difference]: Without dead ends: 398 [2021-03-10 18:09:15,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 18:09:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-03-10 18:09:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 290. [2021-03-10 18:09:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.8754325259515572) internal successors, (542), 289 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 542 transitions. [2021-03-10 18:09:15,701 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 542 transitions. Word has length 50 [2021-03-10 18:09:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:15,701 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 542 transitions. [2021-03-10 18:09:15,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 542 transitions. [2021-03-10 18:09:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-03-10 18:09:15,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:15,703 INFO L519 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] [2021-03-10 18:09:15,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 18:09:15,703 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash 802569496, now seen corresponding path program 1 times [2021-03-10 18:09:15,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:15,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295110297] [2021-03-10 18:09:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:09:15,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295110297] [2021-03-10 18:09:15,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163602536] [2021-03-10 18:09:15,754 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 [2021-03-10 18:09:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:15,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2021-03-10 18:09:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 18:09:15,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 18:09:15,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-03-10 18:09:15,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290334916] [2021-03-10 18:09:15,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 18:09:15,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 18:09:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 18:09:15,906 INFO L87 Difference]: Start difference. First operand 290 states and 542 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:15,918 INFO L93 Difference]: Finished difference Result 430 states and 822 transitions. [2021-03-10 18:09:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 18:09:15,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-03-10 18:09:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:15,919 INFO L225 Difference]: With dead ends: 430 [2021-03-10 18:09:15,920 INFO L226 Difference]: Without dead ends: 430 [2021-03-10 18:09:15,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 18:09:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-03-10 18:09:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 304. [2021-03-10 18:09:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.881188118811881) internal successors, (570), 303 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 570 transitions. [2021-03-10 18:09:15,925 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 570 transitions. Word has length 58 [2021-03-10 18:09:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:15,926 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 570 transitions. [2021-03-10 18:09:15,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 570 transitions. [2021-03-10 18:09:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 18:09:15,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:15,927 INFO L519 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] [2021-03-10 18:09:16,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 18:09:16,143 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 349313876, now seen corresponding path program 1 times [2021-03-10 18:09:16,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:16,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542141982] [2021-03-10 18:09:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 18:09:16,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542141982] [2021-03-10 18:09:16,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478707860] [2021-03-10 18:09:16,199 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 [2021-03-10 18:09:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:16,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 18:09:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 18:09:16,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:16,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 18:09:16,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064665659] [2021-03-10 18:09:16,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 18:09:16,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:16,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 18:09:16,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 18:09:16,429 INFO L87 Difference]: Start difference. First operand 304 states and 570 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:16,465 INFO L93 Difference]: Finished difference Result 570 states and 1102 transitions. [2021-03-10 18:09:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 18:09:16,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-03-10 18:09:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:16,467 INFO L225 Difference]: With dead ends: 570 [2021-03-10 18:09:16,467 INFO L226 Difference]: Without dead ends: 570 [2021-03-10 18:09:16,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 18:09:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-03-10 18:09:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 456. [2021-03-10 18:09:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.920879120879121) internal successors, (874), 455 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 874 transitions. [2021-03-10 18:09:16,482 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 874 transitions. Word has length 69 [2021-03-10 18:09:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:16,482 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 874 transitions. [2021-03-10 18:09:16,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 874 transitions. [2021-03-10 18:09:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-03-10 18:09:16,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:16,487 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 18:09:16,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:09:16,704 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash -333116662, now seen corresponding path program 2 times [2021-03-10 18:09:16,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:16,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627973909] [2021-03-10 18:09:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 18:09:16,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627973909] [2021-03-10 18:09:16,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631010795] [2021-03-10 18:09:16,787 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 [2021-03-10 18:09:16,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 18:09:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 18:09:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 18:09:16,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:16,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-03-10 18:09:16,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230585538] [2021-03-10 18:09:16,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 18:09:16,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 18:09:16,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 18:09:17,000 INFO L87 Difference]: Start difference. First operand 456 states and 874 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2021-03-10 18:09:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:17,385 INFO L93 Difference]: Finished difference Result 1442 states and 2846 transitions. [2021-03-10 18:09:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 18:09:17,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 77 [2021-03-10 18:09:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:17,390 INFO L225 Difference]: With dead ends: 1442 [2021-03-10 18:09:17,390 INFO L226 Difference]: Without dead ends: 1442 [2021-03-10 18:09:17,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 18:09:17,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-03-10 18:09:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 938. [2021-03-10 18:09:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.961579509071505) internal successors, (1838), 937 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1838 transitions. [2021-03-10 18:09:17,406 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1838 transitions. Word has length 77 [2021-03-10 18:09:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:17,406 INFO L480 AbstractCegarLoop]: Abstraction has 938 states and 1838 transitions. [2021-03-10 18:09:17,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2021-03-10 18:09:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1838 transitions. [2021-03-10 18:09:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 18:09:17,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:17,408 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-03-10 18:09:17,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:09:17,623 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:17,623 INFO L82 PathProgramCache]: Analyzing trace with hash -88171860, now seen corresponding path program 3 times [2021-03-10 18:09:17,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:17,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297870728] [2021-03-10 18:09:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-03-10 18:09:17,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297870728] [2021-03-10 18:09:17,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223364623] [2021-03-10 18:09:17,678 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 [2021-03-10 18:09:17,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 18:09:17,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:17,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 18:09:17,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-03-10 18:09:17,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:17,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-03-10 18:09:17,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104895361] [2021-03-10 18:09:17,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 18:09:17,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 18:09:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 18:09:17,902 INFO L87 Difference]: Start difference. First operand 938 states and 1838 transitions. Second operand has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:18,952 INFO L93 Difference]: Finished difference Result 2238 states and 4438 transitions. [2021-03-10 18:09:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-03-10 18:09:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 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 96 [2021-03-10 18:09:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:18,960 INFO L225 Difference]: With dead ends: 2238 [2021-03-10 18:09:18,960 INFO L226 Difference]: Without dead ends: 2238 [2021-03-10 18:09:18,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3395 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=2000, Invalid=6742, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 18:09:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-03-10 18:09:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1596. [2021-03-10 18:09:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 1.9774294670846395) internal successors, (3154), 1595 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 3154 transitions. [2021-03-10 18:09:18,985 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 3154 transitions. Word has length 96 [2021-03-10 18:09:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:18,985 INFO L480 AbstractCegarLoop]: Abstraction has 1596 states and 3154 transitions. [2021-03-10 18:09:18,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 3154 transitions. [2021-03-10 18:09:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-03-10 18:09:18,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:18,987 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-03-10 18:09:19,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:09:19,204 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:19,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2080944246, now seen corresponding path program 4 times [2021-03-10 18:09:19,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:19,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063728474] [2021-03-10 18:09:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:19,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063728474] [2021-03-10 18:09:19,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387768857] [2021-03-10 18:09:19,287 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 [2021-03-10 18:09:19,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 18:09:19,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 18:09:19,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:19,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:19,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 18:09:19,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538130748] [2021-03-10 18:09:19,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 18:09:19,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 18:09:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 18:09:19,517 INFO L87 Difference]: Start difference. First operand 1596 states and 3154 transitions. Second operand has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 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) [2021-03-10 18:09:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:19,633 INFO L93 Difference]: Finished difference Result 2170 states and 4302 transitions. [2021-03-10 18:09:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 18:09:19,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 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 115 [2021-03-10 18:09:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:19,638 INFO L225 Difference]: With dead ends: 2170 [2021-03-10 18:09:19,638 INFO L226 Difference]: Without dead ends: 2170 [2021-03-10 18:09:19,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-03-10 18:09:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-03-10 18:09:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1924. [2021-03-10 18:09:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 1.9812792511700468) internal successors, (3810), 1923 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 3810 transitions. [2021-03-10 18:09:19,679 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 3810 transitions. Word has length 115 [2021-03-10 18:09:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:19,679 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 3810 transitions. [2021-03-10 18:09:19,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 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) [2021-03-10 18:09:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 3810 transitions. [2021-03-10 18:09:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-03-10 18:09:19,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:19,683 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-03-10 18:09:19,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 18:09:19,898 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash -496463444, now seen corresponding path program 5 times [2021-03-10 18:09:19,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:19,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841442105] [2021-03-10 18:09:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:19,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841442105] [2021-03-10 18:09:19,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317092661] [2021-03-10 18:09:19,997 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 [2021-03-10 18:09:20,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 18:09:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:20,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 18:09:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:20,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:20,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-03-10 18:09:20,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137810495] [2021-03-10 18:09:20,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 18:09:20,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:20,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 18:09:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 18:09:20,229 INFO L87 Difference]: Start difference. First operand 1924 states and 3810 transitions. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:20,339 INFO L93 Difference]: Finished difference Result 2498 states and 4958 transitions. [2021-03-10 18:09:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 18:09:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 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 [2021-03-10 18:09:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:20,345 INFO L225 Difference]: With dead ends: 2498 [2021-03-10 18:09:20,345 INFO L226 Difference]: Without dead ends: 2498 [2021-03-10 18:09:20,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-03-10 18:09:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-03-10 18:09:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2252. [2021-03-10 18:09:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 1.9840071079520214) internal successors, (4466), 2251 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 4466 transitions. [2021-03-10 18:09:20,380 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 4466 transitions. Word has length 123 [2021-03-10 18:09:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:20,381 INFO L480 AbstractCegarLoop]: Abstraction has 2252 states and 4466 transitions. [2021-03-10 18:09:20,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 4466 transitions. [2021-03-10 18:09:20,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-03-10 18:09:20,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:20,386 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-03-10 18:09:20,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:09:20,599 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash -439952158, now seen corresponding path program 6 times [2021-03-10 18:09:20,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:20,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216961525] [2021-03-10 18:09:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:20,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216961525] [2021-03-10 18:09:20,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080983652] [2021-03-10 18:09:20,739 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 [2021-03-10 18:09:20,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 18:09:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 18:09:20,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:21,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:21,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 18:09:21,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266063936] [2021-03-10 18:09:21,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 18:09:21,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:21,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 18:09:21,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 18:09:21,053 INFO L87 Difference]: Start difference. First operand 2252 states and 4466 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:21,196 INFO L93 Difference]: Finished difference Result 2826 states and 5614 transitions. [2021-03-10 18:09:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 18:09:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 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 131 [2021-03-10 18:09:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:21,203 INFO L225 Difference]: With dead ends: 2826 [2021-03-10 18:09:21,204 INFO L226 Difference]: Without dead ends: 2826 [2021-03-10 18:09:21,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-03-10 18:09:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-03-10 18:09:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2580. [2021-03-10 18:09:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 2579 states have (on average 1.9860411012020163) internal successors, (5122), 2579 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 5122 transitions. [2021-03-10 18:09:21,244 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 5122 transitions. Word has length 131 [2021-03-10 18:09:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:21,244 INFO L480 AbstractCegarLoop]: Abstraction has 2580 states and 5122 transitions. [2021-03-10 18:09:21,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 5122 transitions. [2021-03-10 18:09:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-03-10 18:09:21,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:21,249 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 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] [2021-03-10 18:09:21,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:09:21,459 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:21,459 INFO L82 PathProgramCache]: Analyzing trace with hash -31878632, now seen corresponding path program 7 times [2021-03-10 18:09:21,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:21,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296004487] [2021-03-10 18:09:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:21,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296004487] [2021-03-10 18:09:21,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303349608] [2021-03-10 18:09:21,599 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 [2021-03-10 18:09:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 18:09:21,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:21,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:21,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-03-10 18:09:21,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104265079] [2021-03-10 18:09:21,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 18:09:21,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 18:09:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-03-10 18:09:21,833 INFO L87 Difference]: Start difference. First operand 2580 states and 5122 transitions. Second operand has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 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) [2021-03-10 18:09:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:22,013 INFO L93 Difference]: Finished difference Result 3154 states and 6270 transitions. [2021-03-10 18:09:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 18:09:22,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 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 139 [2021-03-10 18:09:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:22,021 INFO L225 Difference]: With dead ends: 3154 [2021-03-10 18:09:22,021 INFO L226 Difference]: Without dead ends: 3154 [2021-03-10 18:09:22,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 18:09:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-03-10 18:09:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2908. [2021-03-10 18:09:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 1.9876160990712075) internal successors, (5778), 2907 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 5778 transitions. [2021-03-10 18:09:22,064 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 5778 transitions. Word has length 139 [2021-03-10 18:09:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:22,064 INFO L480 AbstractCegarLoop]: Abstraction has 2908 states and 5778 transitions. [2021-03-10 18:09:22,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 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) [2021-03-10 18:09:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 5778 transitions. [2021-03-10 18:09:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-03-10 18:09:22,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:22,069 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-03-10 18:09:22,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 18:09:22,286 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1297527118, now seen corresponding path program 8 times [2021-03-10 18:09:22,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:22,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123458872] [2021-03-10 18:09:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:22,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123458872] [2021-03-10 18:09:22,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958425814] [2021-03-10 18:09:22,457 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 [2021-03-10 18:09:22,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 18:09:22,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:22,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 18:09:22,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:22,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:22,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-03-10 18:09:22,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000306379] [2021-03-10 18:09:22,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 18:09:22,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:22,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 18:09:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-03-10 18:09:22,697 INFO L87 Difference]: Start difference. First operand 2908 states and 5778 transitions. Second operand has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:22,882 INFO L93 Difference]: Finished difference Result 3482 states and 6926 transitions. [2021-03-10 18:09:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 18:09:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 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 147 [2021-03-10 18:09:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:22,892 INFO L225 Difference]: With dead ends: 3482 [2021-03-10 18:09:22,892 INFO L226 Difference]: Without dead ends: 3482 [2021-03-10 18:09:22,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 18:09:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2021-03-10 18:09:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 3236. [2021-03-10 18:09:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 1.98887171561051) internal successors, (6434), 3235 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 6434 transitions. [2021-03-10 18:09:22,942 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 6434 transitions. Word has length 147 [2021-03-10 18:09:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:22,942 INFO L480 AbstractCegarLoop]: Abstraction has 3236 states and 6434 transitions. [2021-03-10 18:09:22,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 6434 transitions. [2021-03-10 18:09:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-03-10 18:09:22,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:22,947 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-03-10 18:09:23,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:09:23,164 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:23,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1619772796, now seen corresponding path program 9 times [2021-03-10 18:09:23,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:23,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077837099] [2021-03-10 18:09:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-03-10 18:09:23,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077837099] [2021-03-10 18:09:23,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568175881] [2021-03-10 18:09:23,351 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 [2021-03-10 18:09:23,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 18:09:23,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 18:09:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-03-10 18:09:23,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:23,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2021-03-10 18:09:23,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943194194] [2021-03-10 18:09:23,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 18:09:23,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 18:09:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-03-10 18:09:23,664 INFO L87 Difference]: Start difference. First operand 3236 states and 6434 transitions. Second operand has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 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) [2021-03-10 18:09:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:31,207 INFO L93 Difference]: Finished difference Result 5650 states and 11262 transitions. [2021-03-10 18:09:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-03-10 18:09:31,207 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 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 155 [2021-03-10 18:09:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:31,225 INFO L225 Difference]: With dead ends: 5650 [2021-03-10 18:09:31,225 INFO L226 Difference]: Without dead ends: 5650 [2021-03-10 18:09:31,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50979 ImplicationChecksByTransitivity, 6987.7ms TimeCoverageRelationStatistics Valid=21579, Invalid=88313, Unknown=0, NotChecked=0, Total=109892 [2021-03-10 18:09:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2021-03-10 18:09:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 4510. [2021-03-10 18:09:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.9920159680638723) internal successors, (8982), 4509 states have internal predecessors, (8982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 8982 transitions. [2021-03-10 18:09:31,309 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 8982 transitions. Word has length 155 [2021-03-10 18:09:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:31,309 INFO L480 AbstractCegarLoop]: Abstraction has 4510 states and 8982 transitions. [2021-03-10 18:09:31,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 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) [2021-03-10 18:09:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 8982 transitions. [2021-03-10 18:09:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-03-10 18:09:31,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:31,315 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 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] [2021-03-10 18:09:31,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:09:31,527 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:31,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1357590158, now seen corresponding path program 10 times [2021-03-10 18:09:31,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:31,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077627376] [2021-03-10 18:09:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-03-10 18:09:31,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077627376] [2021-03-10 18:09:31,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297450437] [2021-03-10 18:09:31,760 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 [2021-03-10 18:09:31,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 18:09:31,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 18:09:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-03-10 18:09:32,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:32,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-03-10 18:09:32,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152863821] [2021-03-10 18:09:32,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 18:09:32,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:32,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 18:09:32,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-03-10 18:09:32,039 INFO L87 Difference]: Start difference. First operand 4510 states and 8982 transitions. Second operand has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:32,317 INFO L93 Difference]: Finished difference Result 5238 states and 10438 transitions. [2021-03-10 18:09:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 18:09:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 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 174 [2021-03-10 18:09:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:32,324 INFO L225 Difference]: With dead ends: 5238 [2021-03-10 18:09:32,324 INFO L226 Difference]: Without dead ends: 5238 [2021-03-10 18:09:32,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 18:09:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-03-10 18:09:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 4926. [2021-03-10 18:09:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 4925 states have (on average 1.9926903553299493) internal successors, (9814), 4925 states have internal predecessors, (9814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 9814 transitions. [2021-03-10 18:09:32,379 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 9814 transitions. Word has length 174 [2021-03-10 18:09:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:32,379 INFO L480 AbstractCegarLoop]: Abstraction has 4926 states and 9814 transitions. [2021-03-10 18:09:32,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 9814 transitions. [2021-03-10 18:09:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-03-10 18:09:32,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:32,386 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 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] [2021-03-10 18:09:32,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 18:09:32,603 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1679739268, now seen corresponding path program 11 times [2021-03-10 18:09:32,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:32,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679108887] [2021-03-10 18:09:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-03-10 18:09:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679108887] [2021-03-10 18:09:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173850135] [2021-03-10 18:09:32,835 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 [2021-03-10 18:09:32,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 18:09:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 18:09:32,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2021-03-10 18:09:33,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:33,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 34 [2021-03-10 18:09:33,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27622942] [2021-03-10 18:09:33,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 18:09:33,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 18:09:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 18:09:33,228 INFO L87 Difference]: Start difference. First operand 4926 states and 9814 transitions. Second operand has 34 states, 34 states have (on average 6.147058823529412) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:09:48,184 INFO L93 Difference]: Finished difference Result 7814 states and 15590 transitions. [2021-03-10 18:09:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 491 states. [2021-03-10 18:09:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.147058823529412) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 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 [2021-03-10 18:09:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:09:48,191 INFO L225 Difference]: With dead ends: 7814 [2021-03-10 18:09:48,191 INFO L226 Difference]: Without dead ends: 7814 [2021-03-10 18:09:48,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 1150 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122788 ImplicationChecksByTransitivity, 14156.1ms TimeCoverageRelationStatistics Valid=47940, Invalid=207590, Unknown=0, NotChecked=0, Total=255530 [2021-03-10 18:09:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7814 states. [2021-03-10 18:09:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7814 to 6464. [2021-03-10 18:09:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6464 states, 6463 states have (on average 1.9944298313476714) internal successors, (12890), 6463 states have internal predecessors, (12890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6464 states to 6464 states and 12890 transitions. [2021-03-10 18:09:48,263 INFO L78 Accepts]: Start accepts. Automaton has 6464 states and 12890 transitions. Word has length 182 [2021-03-10 18:09:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:09:48,263 INFO L480 AbstractCegarLoop]: Abstraction has 6464 states and 12890 transitions. [2021-03-10 18:09:48,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.147058823529412) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:09:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6464 states and 12890 transitions. [2021-03-10 18:09:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-03-10 18:09:48,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:09:48,272 INFO L519 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 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] [2021-03-10 18:09:48,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 18:09:48,486 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:09:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:09:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1218447834, now seen corresponding path program 12 times [2021-03-10 18:09:48,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:09:48,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854772411] [2021-03-10 18:09:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:09:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:09:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-03-10 18:09:48,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854772411] [2021-03-10 18:09:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734724735] [2021-03-10 18:09:48,772 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 [2021-03-10 18:09:48,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 18:09:48,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:09:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 18:09:48,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:09:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-03-10 18:09:49,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:09:49,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-03-10 18:09:49,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375039131] [2021-03-10 18:09:49,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 18:09:49,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:09:49,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 18:09:49,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 18:09:49,297 INFO L87 Difference]: Start difference. First operand 6464 states and 12890 transitions. Second operand has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:10:15,283 INFO L93 Difference]: Finished difference Result 9666 states and 19294 transitions. [2021-03-10 18:10:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 647 states. [2021-03-10 18:10:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 0 states have call successors, (0), 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 201 [2021-03-10 18:10:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:10:15,292 INFO L225 Difference]: With dead ends: 9666 [2021-03-10 18:10:15,293 INFO L226 Difference]: Without dead ends: 9666 [2021-03-10 18:10:15,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 1479 GetRequests, 817 SyntacticMatches, 0 SemanticMatches, 662 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215472 ImplicationChecksByTransitivity, 24716.6ms TimeCoverageRelationStatistics Valid=80318, Invalid=359914, Unknown=0, NotChecked=0, Total=440232 [2021-03-10 18:10:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-03-10 18:10:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 8178. [2021-03-10 18:10:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8178 states, 8177 states have (on average 1.9955974073621132) internal successors, (16318), 8177 states have internal predecessors, (16318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8178 states to 8178 states and 16318 transitions. [2021-03-10 18:10:15,394 INFO L78 Accepts]: Start accepts. Automaton has 8178 states and 16318 transitions. Word has length 201 [2021-03-10 18:10:15,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:10:15,395 INFO L480 AbstractCegarLoop]: Abstraction has 8178 states and 16318 transitions. [2021-03-10 18:10:15,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 8178 states and 16318 transitions. [2021-03-10 18:10:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-03-10 18:10:15,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:10:15,404 INFO L519 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 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] [2021-03-10 18:10:15,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 18:10:15,621 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:10:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:10:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1455154416, now seen corresponding path program 13 times [2021-03-10 18:10:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:10:15,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334793852] [2021-03-10 18:10:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:10:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:10:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-03-10 18:10:15,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334793852] [2021-03-10 18:10:15,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735200119] [2021-03-10 18:10:15,903 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 [2021-03-10 18:10:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:10:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 18:10:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:10:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-03-10 18:10:16,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:10:16,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-03-10 18:10:16,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948926917] [2021-03-10 18:10:16,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 18:10:16,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:10:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 18:10:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-03-10 18:10:16,295 INFO L87 Difference]: Start difference. First operand 8178 states and 16318 transitions. Second operand has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:10:16,808 INFO L93 Difference]: Finished difference Result 9214 states and 18390 transitions. [2021-03-10 18:10:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 18:10:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 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 220 [2021-03-10 18:10:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:10:16,817 INFO L225 Difference]: With dead ends: 9214 [2021-03-10 18:10:16,817 INFO L226 Difference]: Without dead ends: 9214 [2021-03-10 18:10:16,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 18:10:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2021-03-10 18:10:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 8770. [2021-03-10 18:10:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 1.9958946288060213) internal successors, (17502), 8769 states have internal predecessors, (17502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 17502 transitions. [2021-03-10 18:10:16,902 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 17502 transitions. Word has length 220 [2021-03-10 18:10:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:10:16,902 INFO L480 AbstractCegarLoop]: Abstraction has 8770 states and 17502 transitions. [2021-03-10 18:10:16,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 17502 transitions. [2021-03-10 18:10:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-03-10 18:10:16,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:10:16,916 INFO L519 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 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] [2021-03-10 18:10:17,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:10:17,131 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:10:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:10:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash -655540582, now seen corresponding path program 14 times [2021-03-10 18:10:17,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:10:17,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964447947] [2021-03-10 18:10:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:10:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:10:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-03-10 18:10:17,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964447947] [2021-03-10 18:10:17,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316420889] [2021-03-10 18:10:17,466 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 [2021-03-10 18:10:17,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 18:10:17,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:10:17,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 18:10:17,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:10:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-03-10 18:10:17,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:10:17,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-03-10 18:10:17,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225826865] [2021-03-10 18:10:17,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 18:10:17,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:10:17,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 18:10:17,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 18:10:17,987 INFO L87 Difference]: Start difference. First operand 8770 states and 17502 transitions. Second operand has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:10:18,575 INFO L93 Difference]: Finished difference Result 9806 states and 19574 transitions. [2021-03-10 18:10:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 18:10:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 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 228 [2021-03-10 18:10:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:10:18,587 INFO L225 Difference]: With dead ends: 9806 [2021-03-10 18:10:18,587 INFO L226 Difference]: Without dead ends: 9806 [2021-03-10 18:10:18,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 687.7ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 18:10:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9806 states. [2021-03-10 18:10:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9806 to 9362. [2021-03-10 18:10:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9362 states, 9361 states have (on average 1.9961542570238222) internal successors, (18686), 9361 states have internal predecessors, (18686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9362 states to 9362 states and 18686 transitions. [2021-03-10 18:10:18,677 INFO L78 Accepts]: Start accepts. Automaton has 9362 states and 18686 transitions. Word has length 228 [2021-03-10 18:10:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:10:18,678 INFO L480 AbstractCegarLoop]: Abstraction has 9362 states and 18686 transitions. [2021-03-10 18:10:18,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:10:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9362 states and 18686 transitions. [2021-03-10 18:10:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-03-10 18:10:18,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:10:18,690 INFO L519 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 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] [2021-03-10 18:10:18,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 18:10:18,906 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:10:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:10:18,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1750648796, now seen corresponding path program 15 times [2021-03-10 18:10:18,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:10:18,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342620994] [2021-03-10 18:10:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:10:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:10:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-03-10 18:10:19,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342620994] [2021-03-10 18:10:19,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551349668] [2021-03-10 18:10:19,278 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 [2021-03-10 18:10:19,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 18:10:19,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:10:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 18:10:19,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:10:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-03-10 18:10:19,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:10:19,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2021-03-10 18:10:19,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324451814] [2021-03-10 18:10:19,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-03-10 18:10:19,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:10:19,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-03-10 18:10:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 18:10:19,946 INFO L87 Difference]: Start difference. First operand 9362 states and 18686 transitions. Second operand has 46 states, 46 states have (on average 5.717391304347826) internal successors, (263), 46 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:11:16,531 INFO L93 Difference]: Finished difference Result 13198 states and 26358 transitions. [2021-03-10 18:11:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 941 states. [2021-03-10 18:11:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.717391304347826) internal successors, (263), 46 states have internal predecessors, (263), 0 states have call successors, (0), 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 [2021-03-10 18:11:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:11:16,543 INFO L225 Difference]: With dead ends: 13198 [2021-03-10 18:11:16,543 INFO L226 Difference]: Without dead ends: 13198 [2021-03-10 18:11:16,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 960 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461132 ImplicationChecksByTransitivity, 54163.0ms TimeCoverageRelationStatistics Valid=164058, Invalid=760424, Unknown=0, NotChecked=0, Total=924482 [2021-03-10 18:11:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2021-03-10 18:11:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 11428. [2021-03-10 18:11:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 1.9968495668154371) internal successors, (22818), 11427 states have internal predecessors, (22818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 22818 transitions. [2021-03-10 18:11:16,682 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 22818 transitions. Word has length 236 [2021-03-10 18:11:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:11:16,682 INFO L480 AbstractCegarLoop]: Abstraction has 11428 states and 22818 transitions. [2021-03-10 18:11:16,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 5.717391304347826) internal successors, (263), 46 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 22818 transitions. [2021-03-10 18:11:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-03-10 18:11:16,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:11:16,694 INFO L519 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 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] [2021-03-10 18:11:16,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 18:11:16,913 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:11:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:11:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash -404687106, now seen corresponding path program 16 times [2021-03-10 18:11:16,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:11:16,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838039461] [2021-03-10 18:11:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:11:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:11:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-03-10 18:11:17,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838039461] [2021-03-10 18:11:17,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063259295] [2021-03-10 18:11:17,381 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 [2021-03-10 18:11:17,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 18:11:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:11:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 18:11:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:11:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-03-10 18:11:17,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:11:17,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-03-10 18:11:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904074804] [2021-03-10 18:11:17,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 18:11:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:11:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 18:11:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 18:11:17,934 INFO L87 Difference]: Start difference. First operand 11428 states and 22818 transitions. Second operand has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:11:18,826 INFO L93 Difference]: Finished difference Result 12618 states and 25198 transitions. [2021-03-10 18:11:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 18:11:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 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 255 [2021-03-10 18:11:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:11:18,835 INFO L225 Difference]: With dead ends: 12618 [2021-03-10 18:11:18,835 INFO L226 Difference]: Without dead ends: 12618 [2021-03-10 18:11:18,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 18:11:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12618 states. [2021-03-10 18:11:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12618 to 12108. [2021-03-10 18:11:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12108 states, 12107 states have (on average 1.997026513587181) internal successors, (24178), 12107 states have internal predecessors, (24178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12108 states to 12108 states and 24178 transitions. [2021-03-10 18:11:18,944 INFO L78 Accepts]: Start accepts. Automaton has 12108 states and 24178 transitions. Word has length 255 [2021-03-10 18:11:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:11:18,944 INFO L480 AbstractCegarLoop]: Abstraction has 12108 states and 24178 transitions. [2021-03-10 18:11:18,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 12108 states and 24178 transitions. [2021-03-10 18:11:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-03-10 18:11:18,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:11:18,954 INFO L519 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 7, 7, 7, 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] [2021-03-10 18:11:19,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:11:19,174 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:11:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:11:19,174 INFO L82 PathProgramCache]: Analyzing trace with hash -564046028, now seen corresponding path program 17 times [2021-03-10 18:11:19,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:11:19,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549193845] [2021-03-10 18:11:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:11:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:11:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-03-10 18:11:19,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549193845] [2021-03-10 18:11:19,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681990514] [2021-03-10 18:11:19,665 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 [2021-03-10 18:11:19,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-03-10 18:11:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:11:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 18:11:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:11:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-03-10 18:11:20,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:11:20,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-03-10 18:11:20,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894229637] [2021-03-10 18:11:20,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 18:11:20,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:11:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 18:11:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 18:11:20,221 INFO L87 Difference]: Start difference. First operand 12108 states and 24178 transitions. Second operand has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:21,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:11:21,079 INFO L93 Difference]: Finished difference Result 13298 states and 26558 transitions. [2021-03-10 18:11:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 18:11:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 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 263 [2021-03-10 18:11:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:11:21,096 INFO L225 Difference]: With dead ends: 13298 [2021-03-10 18:11:21,096 INFO L226 Difference]: Without dead ends: 13298 [2021-03-10 18:11:21,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1063.7ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 18:11:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13298 states. [2021-03-10 18:11:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13298 to 12788. [2021-03-10 18:11:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12788 states, 12787 states have (on average 1.9971846406506608) internal successors, (25538), 12787 states have internal predecessors, (25538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12788 states to 12788 states and 25538 transitions. [2021-03-10 18:11:21,211 INFO L78 Accepts]: Start accepts. Automaton has 12788 states and 25538 transitions. Word has length 263 [2021-03-10 18:11:21,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:11:21,212 INFO L480 AbstractCegarLoop]: Abstraction has 12788 states and 25538 transitions. [2021-03-10 18:11:21,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:11:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 12788 states and 25538 transitions. [2021-03-10 18:11:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-03-10 18:11:21,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:11:21,223 INFO L519 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 7, 7, 7, 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] [2021-03-10 18:11:21,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:11:21,424 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:11:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:11:21,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1156653418, now seen corresponding path program 18 times [2021-03-10 18:11:21,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:11:21,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534685354] [2021-03-10 18:11:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:11:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:11:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-03-10 18:11:21,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534685354] [2021-03-10 18:11:21,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727673256] [2021-03-10 18:11:21,974 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 [2021-03-10 18:11:22,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-03-10 18:11:22,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:11:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 18:11:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:11:22,507 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-03-10 18:11:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2021-03-10 18:11:23,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:11:23,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 17] total 54 [2021-03-10 18:11:23,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45770530] [2021-03-10 18:11:23,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-03-10 18:11:23,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:11:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-03-10 18:11:23,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=2384, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 18:11:23,132 INFO L87 Difference]: Start difference. First operand 12788 states and 25538 transitions. Second operand has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:13:39,420 INFO L93 Difference]: Finished difference Result 17258 states and 34478 transitions. [2021-03-10 18:13:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1289 states. [2021-03-10 18:13:39,420 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 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 271 [2021-03-10 18:13:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:13:39,431 INFO L225 Difference]: With dead ends: 17258 [2021-03-10 18:13:39,431 INFO L226 Difference]: Without dead ends: 17258 [2021-03-10 18:13:39,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2829 GetRequests, 1517 SyntacticMatches, 0 SemanticMatches, 1312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871728 ImplicationChecksByTransitivity, 131718.4ms TimeCoverageRelationStatistics Valid=299970, Invalid=1425312, Unknown=0, NotChecked=0, Total=1725282 [2021-03-10 18:13:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17258 states. [2021-03-10 18:13:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17258 to 15206. [2021-03-10 18:13:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15206 states, 15205 states have (on average 1.997632357777047) internal successors, (30374), 15205 states have internal predecessors, (30374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15206 states to 15206 states and 30374 transitions. [2021-03-10 18:13:39,626 INFO L78 Accepts]: Start accepts. Automaton has 15206 states and 30374 transitions. Word has length 271 [2021-03-10 18:13:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:13:39,626 INFO L480 AbstractCegarLoop]: Abstraction has 15206 states and 30374 transitions. [2021-03-10 18:13:39,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 15206 states and 30374 transitions. [2021-03-10 18:13:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-03-10 18:13:39,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:13:39,639 INFO L519 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 8, 8, 8, 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] [2021-03-10 18:13:39,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:13:39,856 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:13:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:13:39,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2113741364, now seen corresponding path program 19 times [2021-03-10 18:13:39,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:13:39,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340028461] [2021-03-10 18:13:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:13:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-03-10 18:13:41,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340028461] [2021-03-10 18:13:41,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802791903] [2021-03-10 18:13:41,098 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 [2021-03-10 18:13:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 18:13:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:13:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-03-10 18:13:42,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:13:42,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-03-10 18:13:42,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643605578] [2021-03-10 18:13:42,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-03-10 18:13:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:13:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-03-10 18:13:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 18:13:42,282 INFO L87 Difference]: Start difference. First operand 15206 states and 30374 transitions. Second operand has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:13:43,975 INFO L93 Difference]: Finished difference Result 15974 states and 31910 transitions. [2021-03-10 18:13:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 18:13:43,977 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 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 290 [2021-03-10 18:13:43,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:13:43,989 INFO L225 Difference]: With dead ends: 15974 [2021-03-10 18:13:43,989 INFO L226 Difference]: Without dead ends: 15974 [2021-03-10 18:13:43,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2535.2ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 18:13:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15974 states. [2021-03-10 18:13:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15974 to 15974. [2021-03-10 18:13:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15974 states, 15973 states have (on average 1.997746196706943) internal successors, (31910), 15973 states have internal predecessors, (31910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15974 states to 15974 states and 31910 transitions. [2021-03-10 18:13:44,122 INFO L78 Accepts]: Start accepts. Automaton has 15974 states and 31910 transitions. Word has length 290 [2021-03-10 18:13:44,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:13:44,122 INFO L480 AbstractCegarLoop]: Abstraction has 15974 states and 31910 transitions. [2021-03-10 18:13:44,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 15974 states and 31910 transitions. [2021-03-10 18:13:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-03-10 18:13:44,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:13:44,138 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 8, 8, 8, 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] [2021-03-10 18:13:44,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 18:13:44,351 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:13:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:13:44,351 INFO L82 PathProgramCache]: Analyzing trace with hash 905732566, now seen corresponding path program 20 times [2021-03-10 18:13:44,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:13:44,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883749262] [2021-03-10 18:13:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:13:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:44,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883749262] [2021-03-10 18:13:44,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536295394] [2021-03-10 18:13:44,684 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 [2021-03-10 18:13:44,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 18:13:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:13:44,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 18:13:44,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:13:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:45,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:13:45,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-03-10 18:13:45,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919914255] [2021-03-10 18:13:45,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 18:13:45,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:13:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 18:13:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-03-10 18:13:45,892 INFO L87 Difference]: Start difference. First operand 15974 states and 31910 transitions. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:13:46,343 INFO L93 Difference]: Finished difference Result 19294 states and 38550 transitions. [2021-03-10 18:13:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 18:13:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 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 298 [2021-03-10 18:13:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:13:46,359 INFO L225 Difference]: With dead ends: 19294 [2021-03-10 18:13:46,359 INFO L226 Difference]: Without dead ends: 19294 [2021-03-10 18:13:46,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 18:13:46,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19294 states. [2021-03-10 18:13:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19294 to 17800. [2021-03-10 18:13:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17800 states, 17799 states have (on average 1.9979774144614866) internal successors, (35562), 17799 states have internal predecessors, (35562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17800 states to 17800 states and 35562 transitions. [2021-03-10 18:13:46,504 INFO L78 Accepts]: Start accepts. Automaton has 17800 states and 35562 transitions. Word has length 298 [2021-03-10 18:13:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:13:46,504 INFO L480 AbstractCegarLoop]: Abstraction has 17800 states and 35562 transitions. [2021-03-10 18:13:46,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 17800 states and 35562 transitions. [2021-03-10 18:13:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-03-10 18:13:46,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:13:46,518 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 9, 9, 9, 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] [2021-03-10 18:13:46,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 18:13:46,719 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:13:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:13:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1945750570, now seen corresponding path program 21 times [2021-03-10 18:13:46,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:13:46,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095864072] [2021-03-10 18:13:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:13:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:47,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095864072] [2021-03-10 18:13:47,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251470204] [2021-03-10 18:13:47,107 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 [2021-03-10 18:13:47,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 18:13:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:13:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 18:13:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:13:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:48,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:13:48,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-03-10 18:13:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781385042] [2021-03-10 18:13:48,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 18:13:48,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:13:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 18:13:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-03-10 18:13:48,623 INFO L87 Difference]: Start difference. First operand 17800 states and 35562 transitions. Second operand has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:13:49,151 INFO L93 Difference]: Finished difference Result 21120 states and 42202 transitions. [2021-03-10 18:13:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 18:13:49,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 0 states have call successors, (0), 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 309 [2021-03-10 18:13:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:13:49,168 INFO L225 Difference]: With dead ends: 21120 [2021-03-10 18:13:49,169 INFO L226 Difference]: Without dead ends: 21120 [2021-03-10 18:13:49,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 18:13:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2021-03-10 18:13:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 19626. [2021-03-10 18:13:49,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19626 states, 19625 states have (on average 1.9981656050955414) internal successors, (39214), 19625 states have internal predecessors, (39214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19626 states to 19626 states and 39214 transitions. [2021-03-10 18:13:49,331 INFO L78 Accepts]: Start accepts. Automaton has 19626 states and 39214 transitions. Word has length 309 [2021-03-10 18:13:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:13:49,332 INFO L480 AbstractCegarLoop]: Abstraction has 19626 states and 39214 transitions. [2021-03-10 18:13:49,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 19626 states and 39214 transitions. [2021-03-10 18:13:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-03-10 18:13:49,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:13:49,346 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 10, 10, 10, 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] [2021-03-10 18:13:49,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:13:49,555 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:13:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:13:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash 336342, now seen corresponding path program 22 times [2021-03-10 18:13:49,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:13:49,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147412737] [2021-03-10 18:13:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:13:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:49,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147412737] [2021-03-10 18:13:49,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966520311] [2021-03-10 18:13:49,940 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 [2021-03-10 18:13:50,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 18:13:50,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:13:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 18:13:50,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:13:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:51,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:13:51,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-03-10 18:13:51,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103090462] [2021-03-10 18:13:51,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 18:13:51,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:13:51,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 18:13:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-03-10 18:13:51,248 INFO L87 Difference]: Start difference. First operand 19626 states and 39214 transitions. Second operand has 25 states, 25 states have (on average 7.16) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:13:51,894 INFO L93 Difference]: Finished difference Result 22946 states and 45854 transitions. [2021-03-10 18:13:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 18:13:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.16) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 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 320 [2021-03-10 18:13:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:13:51,913 INFO L225 Difference]: With dead ends: 22946 [2021-03-10 18:13:51,913 INFO L226 Difference]: Without dead ends: 22946 [2021-03-10 18:13:51,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 823.0ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 18:13:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22946 states. [2021-03-10 18:13:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22946 to 21452. [2021-03-10 18:13:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21452 states, 21451 states have (on average 1.9983217565614657) internal successors, (42866), 21451 states have internal predecessors, (42866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 42866 transitions. [2021-03-10 18:13:52,099 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 42866 transitions. Word has length 320 [2021-03-10 18:13:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:13:52,099 INFO L480 AbstractCegarLoop]: Abstraction has 21452 states and 42866 transitions. [2021-03-10 18:13:52,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 7.16) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 42866 transitions. [2021-03-10 18:13:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-03-10 18:13:52,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:13:52,115 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 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] [2021-03-10 18:13:52,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 18:13:52,315 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:13:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:13:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash -385518634, now seen corresponding path program 23 times [2021-03-10 18:13:52,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:13:52,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405890070] [2021-03-10 18:13:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:13:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:52,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405890070] [2021-03-10 18:13:52,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113694932] [2021-03-10 18:13:52,769 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 [2021-03-10 18:13:52,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-03-10 18:13:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:13:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 18:13:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:13:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:54,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:13:54,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-03-10 18:13:54,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819358864] [2021-03-10 18:13:54,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 18:13:54,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:13:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 18:13:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-03-10 18:13:54,160 INFO L87 Difference]: Start difference. First operand 21452 states and 42866 transitions. Second operand has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:13:54,997 INFO L93 Difference]: Finished difference Result 24772 states and 49506 transitions. [2021-03-10 18:13:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 18:13:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 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 331 [2021-03-10 18:13:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:13:55,013 INFO L225 Difference]: With dead ends: 24772 [2021-03-10 18:13:55,014 INFO L226 Difference]: Without dead ends: 24772 [2021-03-10 18:13:55,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 935.0ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 18:13:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24772 states. [2021-03-10 18:13:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24772 to 23278. [2021-03-10 18:13:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23278 states, 23277 states have (on average 1.9984534089444517) internal successors, (46518), 23277 states have internal predecessors, (46518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23278 states to 23278 states and 46518 transitions. [2021-03-10 18:13:55,191 INFO L78 Accepts]: Start accepts. Automaton has 23278 states and 46518 transitions. Word has length 331 [2021-03-10 18:13:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:13:55,191 INFO L480 AbstractCegarLoop]: Abstraction has 23278 states and 46518 transitions. [2021-03-10 18:13:55,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 23278 states and 46518 transitions. [2021-03-10 18:13:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-03-10 18:13:55,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:13:55,209 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 12, 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] [2021-03-10 18:13:55,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:13:55,409 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:13:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:13:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1191043542, now seen corresponding path program 24 times [2021-03-10 18:13:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:13:55,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798573513] [2021-03-10 18:13:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:13:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:55,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798573513] [2021-03-10 18:13:55,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493252240] [2021-03-10 18:13:55,966 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:13:56,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-03-10 18:13:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:13:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 18:13:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:13:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:57,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:13:57,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-03-10 18:13:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86541104] [2021-03-10 18:13:57,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 18:13:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:13:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 18:13:57,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-03-10 18:13:57,568 INFO L87 Difference]: Start difference. First operand 23278 states and 46518 transitions. Second operand has 29 states, 29 states have (on average 6.931034482758621) internal successors, (201), 29 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:13:58,349 INFO L93 Difference]: Finished difference Result 26598 states and 53158 transitions. [2021-03-10 18:13:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 18:13:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.931034482758621) internal successors, (201), 29 states have internal predecessors, (201), 0 states have call successors, (0), 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 342 [2021-03-10 18:13:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:13:58,372 INFO L225 Difference]: With dead ends: 26598 [2021-03-10 18:13:58,372 INFO L226 Difference]: Without dead ends: 26598 [2021-03-10 18:13:58,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1085.4ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 18:13:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26598 states. [2021-03-10 18:13:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26598 to 25104. [2021-03-10 18:13:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25104 states, 25103 states have (on average 1.9985659084571565) internal successors, (50170), 25103 states have internal predecessors, (50170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25104 states to 25104 states and 50170 transitions. [2021-03-10 18:13:58,593 INFO L78 Accepts]: Start accepts. Automaton has 25104 states and 50170 transitions. Word has length 342 [2021-03-10 18:13:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:13:58,593 INFO L480 AbstractCegarLoop]: Abstraction has 25104 states and 50170 transitions. [2021-03-10 18:13:58,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 6.931034482758621) internal successors, (201), 29 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:13:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 25104 states and 50170 transitions. [2021-03-10 18:13:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-03-10 18:13:58,615 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:13:58,615 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:13:58,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 18:13:58,816 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:13:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:13:58,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1393865686, now seen corresponding path program 25 times [2021-03-10 18:13:58,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:13:58,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746337619] [2021-03-10 18:13:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:13:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 871 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:13:59,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746337619] [2021-03-10 18:13:59,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706238656] [2021-03-10 18:13:59,408 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:13:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:13:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 18:13:59,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 871 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:00,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:00,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-03-10 18:14:00,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088757393] [2021-03-10 18:14:00,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 18:14:00,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 18:14:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-03-10 18:14:00,821 INFO L87 Difference]: Start difference. First operand 25104 states and 50170 transitions. Second operand has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:14:01,773 INFO L93 Difference]: Finished difference Result 28424 states and 56810 transitions. [2021-03-10 18:14:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 18:14:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 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 353 [2021-03-10 18:14:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:14:01,796 INFO L225 Difference]: With dead ends: 28424 [2021-03-10 18:14:01,796 INFO L226 Difference]: Without dead ends: 28424 [2021-03-10 18:14:01,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 18:14:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28424 states. [2021-03-10 18:14:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28424 to 26930. [2021-03-10 18:14:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26930 states, 26929 states have (on average 1.9986631512495823) internal successors, (53822), 26929 states have internal predecessors, (53822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26930 states to 26930 states and 53822 transitions. [2021-03-10 18:14:02,033 INFO L78 Accepts]: Start accepts. Automaton has 26930 states and 53822 transitions. Word has length 353 [2021-03-10 18:14:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:14:02,033 INFO L480 AbstractCegarLoop]: Abstraction has 26930 states and 53822 transitions. [2021-03-10 18:14:02,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26930 states and 53822 transitions. [2021-03-10 18:14:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-03-10 18:14:02,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:14:02,056 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:14:02,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 18:14:02,256 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:14:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:14:02,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1226399274, now seen corresponding path program 26 times [2021-03-10 18:14:02,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:14:02,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440331034] [2021-03-10 18:14:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:14:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1015 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:02,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440331034] [2021-03-10 18:14:02,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628944193] [2021-03-10 18:14:02,957 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:03,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 18:14:03,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:14:03,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 18:14:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1015 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:04,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:04,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-03-10 18:14:04,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060291890] [2021-03-10 18:14:04,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 18:14:04,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 18:14:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 18:14:04,443 INFO L87 Difference]: Start difference. First operand 26930 states and 53822 transitions. Second operand has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 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) [2021-03-10 18:14:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:14:05,448 INFO L93 Difference]: Finished difference Result 30250 states and 60462 transitions. [2021-03-10 18:14:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 18:14:05,450 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 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 364 [2021-03-10 18:14:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:14:05,474 INFO L225 Difference]: With dead ends: 30250 [2021-03-10 18:14:05,474 INFO L226 Difference]: Without dead ends: 30250 [2021-03-10 18:14:05,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1416.8ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 18:14:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30250 states. [2021-03-10 18:14:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30250 to 28756. [2021-03-10 18:14:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28756 states, 28755 states have (on average 1.9987480438184664) internal successors, (57474), 28755 states have internal predecessors, (57474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28756 states to 28756 states and 57474 transitions. [2021-03-10 18:14:05,803 INFO L78 Accepts]: Start accepts. Automaton has 28756 states and 57474 transitions. Word has length 364 [2021-03-10 18:14:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:14:05,804 INFO L480 AbstractCegarLoop]: Abstraction has 28756 states and 57474 transitions. [2021-03-10 18:14:05,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 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) [2021-03-10 18:14:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 28756 states and 57474 transitions. [2021-03-10 18:14:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-03-10 18:14:05,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:14:05,827 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:14:06,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 18:14:06,027 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:14:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:14:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1640762410, now seen corresponding path program 27 times [2021-03-10 18:14:06,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:14:06,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585629564] [2021-03-10 18:14:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:14:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:06,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585629564] [2021-03-10 18:14:06,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922288105] [2021-03-10 18:14:06,703 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:07,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-03-10 18:14:07,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:14:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 18:14:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:08,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:08,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-03-10 18:14:08,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455363870] [2021-03-10 18:14:08,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 18:14:08,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 18:14:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 18:14:08,498 INFO L87 Difference]: Start difference. First operand 28756 states and 57474 transitions. Second operand has 35 states, 35 states have (on average 6.685714285714286) internal successors, (234), 35 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:14:09,661 INFO L93 Difference]: Finished difference Result 32076 states and 64114 transitions. [2021-03-10 18:14:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 18:14:09,663 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.685714285714286) internal successors, (234), 35 states have internal predecessors, (234), 0 states have call successors, (0), 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 375 [2021-03-10 18:14:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:14:09,689 INFO L225 Difference]: With dead ends: 32076 [2021-03-10 18:14:09,689 INFO L226 Difference]: Without dead ends: 32076 [2021-03-10 18:14:09,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1514.1ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 18:14:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32076 states. [2021-03-10 18:14:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32076 to 30582. [2021-03-10 18:14:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30582 states, 30581 states have (on average 1.998822798469638) internal successors, (61126), 30581 states have internal predecessors, (61126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30582 states to 30582 states and 61126 transitions. [2021-03-10 18:14:10,073 INFO L78 Accepts]: Start accepts. Automaton has 30582 states and 61126 transitions. Word has length 375 [2021-03-10 18:14:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:14:10,073 INFO L480 AbstractCegarLoop]: Abstraction has 30582 states and 61126 transitions. [2021-03-10 18:14:10,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.685714285714286) internal successors, (234), 35 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 30582 states and 61126 transitions. [2021-03-10 18:14:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-03-10 18:14:10,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:14:10,099 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:14:10,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:10,299 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:14:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:14:10,299 INFO L82 PathProgramCache]: Analyzing trace with hash -71343658, now seen corresponding path program 28 times [2021-03-10 18:14:10,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:14:10,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375956118] [2021-03-10 18:14:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:14:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375956118] [2021-03-10 18:14:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140183514] [2021-03-10 18:14:11,143 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:11,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 18:14:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:14:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 18:14:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:12,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:12,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-03-10 18:14:12,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435619529] [2021-03-10 18:14:12,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 18:14:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 18:14:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 18:14:12,784 INFO L87 Difference]: Start difference. First operand 30582 states and 61126 transitions. Second operand has 37 states, 37 states have (on average 6.621621621621622) internal successors, (245), 37 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:14:14,138 INFO L93 Difference]: Finished difference Result 33902 states and 67766 transitions. [2021-03-10 18:14:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 18:14:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.621621621621622) internal successors, (245), 37 states have internal predecessors, (245), 0 states have call successors, (0), 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 386 [2021-03-10 18:14:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:14:14,166 INFO L225 Difference]: With dead ends: 33902 [2021-03-10 18:14:14,166 INFO L226 Difference]: Without dead ends: 33902 [2021-03-10 18:14:14,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1761.2ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 18:14:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33902 states. [2021-03-10 18:14:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33902 to 32408. [2021-03-10 18:14:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32408 states, 32407 states have (on average 1.9988891288919062) internal successors, (64778), 32407 states have internal predecessors, (64778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32408 states to 32408 states and 64778 transitions. [2021-03-10 18:14:14,449 INFO L78 Accepts]: Start accepts. Automaton has 32408 states and 64778 transitions. Word has length 386 [2021-03-10 18:14:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:14:14,450 INFO L480 AbstractCegarLoop]: Abstraction has 32408 states and 64778 transitions. [2021-03-10 18:14:14,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 6.621621621621622) internal successors, (245), 37 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 32408 states and 64778 transitions. [2021-03-10 18:14:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-03-10 18:14:14,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:14:14,475 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:14:14,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 18:14:14,679 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:14:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:14:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1637665834, now seen corresponding path program 29 times [2021-03-10 18:14:14,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:14:14,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505633306] [2021-03-10 18:14:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:14:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505633306] [2021-03-10 18:14:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454141041] [2021-03-10 18:14:15,577 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:15,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-03-10 18:14:15,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:14:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 18:14:15,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:17,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:17,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-03-10 18:14:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266744883] [2021-03-10 18:14:17,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 18:14:17,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 18:14:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 18:14:17,286 INFO L87 Difference]: Start difference. First operand 32408 states and 64778 transitions. Second operand has 39 states, 39 states have (on average 6.564102564102564) internal successors, (256), 39 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:14:18,670 INFO L93 Difference]: Finished difference Result 35728 states and 71418 transitions. [2021-03-10 18:14:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 18:14:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.564102564102564) internal successors, (256), 39 states have internal predecessors, (256), 0 states have call successors, (0), 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 397 [2021-03-10 18:14:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:14:18,701 INFO L225 Difference]: With dead ends: 35728 [2021-03-10 18:14:18,701 INFO L226 Difference]: Without dead ends: 35728 [2021-03-10 18:14:18,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1913.7ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 18:14:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35728 states. [2021-03-10 18:14:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35728 to 34234. [2021-03-10 18:14:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34234 states, 34233 states have (on average 1.9989483831390764) internal successors, (68430), 34233 states have internal predecessors, (68430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34234 states to 34234 states and 68430 transitions. [2021-03-10 18:14:19,079 INFO L78 Accepts]: Start accepts. Automaton has 34234 states and 68430 transitions. Word has length 397 [2021-03-10 18:14:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:14:19,079 INFO L480 AbstractCegarLoop]: Abstraction has 34234 states and 68430 transitions. [2021-03-10 18:14:19,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 6.564102564102564) internal successors, (256), 39 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 34234 states and 68430 transitions. [2021-03-10 18:14:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-03-10 18:14:19,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:14:19,107 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:14:19,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:19,307 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:14:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:14:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1048043050, now seen corresponding path program 30 times [2021-03-10 18:14:19,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:14:19,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066081601] [2021-03-10 18:14:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:14:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:20,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066081601] [2021-03-10 18:14:20,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506245094] [2021-03-10 18:14:20,300 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:20,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-03-10 18:14:20,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:14:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 18:14:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:22,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:22,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-03-10 18:14:22,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813062743] [2021-03-10 18:14:22,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 18:14:22,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:22,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 18:14:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 18:14:22,265 INFO L87 Difference]: Start difference. First operand 34234 states and 68430 transitions. Second operand has 41 states, 41 states have (on average 6.512195121951219) internal successors, (267), 41 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:14:23,851 INFO L93 Difference]: Finished difference Result 37554 states and 75070 transitions. [2021-03-10 18:14:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 18:14:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.512195121951219) internal successors, (267), 41 states have internal predecessors, (267), 0 states have call successors, (0), 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 408 [2021-03-10 18:14:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:14:23,878 INFO L225 Difference]: With dead ends: 37554 [2021-03-10 18:14:23,878 INFO L226 Difference]: Without dead ends: 37554 [2021-03-10 18:14:23,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 2193.5ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 18:14:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-03-10 18:14:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 36060. [2021-03-10 18:14:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36060 states, 36059 states have (on average 1.9990016362073268) internal successors, (72082), 36059 states have internal predecessors, (72082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36060 states to 36060 states and 72082 transitions. [2021-03-10 18:14:24,184 INFO L78 Accepts]: Start accepts. Automaton has 36060 states and 72082 transitions. Word has length 408 [2021-03-10 18:14:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:14:24,184 INFO L480 AbstractCegarLoop]: Abstraction has 36060 states and 72082 transitions. [2021-03-10 18:14:24,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 6.512195121951219) internal successors, (267), 41 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 36060 states and 72082 transitions. [2021-03-10 18:14:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-03-10 18:14:24,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:14:24,212 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:14:24,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 18:14:24,413 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:14:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:14:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash 664957910, now seen corresponding path program 31 times [2021-03-10 18:14:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:14:24,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988912157] [2021-03-10 18:14:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:14:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988912157] [2021-03-10 18:14:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407690683] [2021-03-10 18:14:25,468 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 18:14:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-03-10 18:14:27,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:27,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-03-10 18:14:27,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941429513] [2021-03-10 18:14:27,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-03-10 18:14:27,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-03-10 18:14:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 18:14:27,233 INFO L87 Difference]: Start difference. First operand 36060 states and 72082 transitions. Second operand has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:14:28,907 INFO L93 Difference]: Finished difference Result 37886 states and 75734 transitions. [2021-03-10 18:14:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 18:14:28,909 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 0 states have call successors, (0), 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 419 [2021-03-10 18:14:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:14:28,938 INFO L225 Difference]: With dead ends: 37886 [2021-03-10 18:14:28,939 INFO L226 Difference]: Without dead ends: 37886 [2021-03-10 18:14:28,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2308.0ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 18:14:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37886 states. [2021-03-10 18:14:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37886 to 37886. [2021-03-10 18:14:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37886 states, 37885 states have (on average 1.9990497558400422) internal successors, (75734), 37885 states have internal predecessors, (75734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37886 states to 37886 states and 75734 transitions. [2021-03-10 18:14:29,349 INFO L78 Accepts]: Start accepts. Automaton has 37886 states and 75734 transitions. Word has length 419 [2021-03-10 18:14:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:14:29,350 INFO L480 AbstractCegarLoop]: Abstraction has 37886 states and 75734 transitions. [2021-03-10 18:14:29,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:14:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 37886 states and 75734 transitions. [2021-03-10 18:14:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-03-10 18:14:29,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:14:29,380 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:14:29,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 18:14:29,580 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:14:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:14:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1270816298, now seen corresponding path program 32 times [2021-03-10 18:14:29,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:14:29,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562662761] [2021-03-10 18:14:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:14:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:14:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:14:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562662761] [2021-03-10 18:14:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842151024] [2021-03-10 18:14:34,152 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:14:34,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 18:14:34,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:14:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-03-10 18:14:34,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:14:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:14:36,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:14:36,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 68 [2021-03-10 18:14:36,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974543079] [2021-03-10 18:14:36,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-03-10 18:14:36,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:14:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-03-10 18:14:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 18:14:36,647 INFO L87 Difference]: Start difference. First operand 37886 states and 75734 transitions. Second operand has 68 states, 68 states have (on average 6.382352941176471) internal successors, (434), 68 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:15:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:15:54,716 INFO L93 Difference]: Finished difference Result 239823 states and 479594 transitions. [2021-03-10 18:15:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-03-10 18:15:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.382352941176471) internal successors, (434), 68 states have internal predecessors, (434), 0 states have call successors, (0), 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 430 [2021-03-10 18:15:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:15:55,101 INFO L225 Difference]: With dead ends: 239823 [2021-03-10 18:15:55,101 INFO L226 Difference]: Without dead ends: 239811 [2021-03-10 18:15:55,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32379 ImplicationChecksByTransitivity, 20528.5ms TimeCoverageRelationStatistics Valid=1156, Invalid=101564, Unknown=0, NotChecked=0, Total=102720 [2021-03-10 18:15:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239811 states. [2021-03-10 18:15:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239811 to 39725. [2021-03-10 18:15:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39725 states, 39724 states have (on average 2.004506092035042) internal successors, (79627), 39724 states have internal predecessors, (79627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:15:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39725 states to 39725 states and 79627 transitions. [2021-03-10 18:15:56,186 INFO L78 Accepts]: Start accepts. Automaton has 39725 states and 79627 transitions. Word has length 430 [2021-03-10 18:15:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:15:56,187 INFO L480 AbstractCegarLoop]: Abstraction has 39725 states and 79627 transitions. [2021-03-10 18:15:56,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 6.382352941176471) internal successors, (434), 68 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:15:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 39725 states and 79627 transitions. [2021-03-10 18:15:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-03-10 18:15:56,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:15:56,218 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:15:56,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 18:15:56,419 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:15:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:15:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1827336460, now seen corresponding path program 33 times [2021-03-10 18:15:56,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:15:56,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453631576] [2021-03-10 18:15:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:15:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:15:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 3477 trivial. 0 not checked. [2021-03-10 18:15:56,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453631576] [2021-03-10 18:15:56,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 18:15:56,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 18:15:56,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911025487] [2021-03-10 18:15:56,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 18:15:56,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:15:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 18:15:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 18:15:56,470 INFO L87 Difference]: Start difference. First operand 39725 states and 79627 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:15:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:15:56,553 INFO L93 Difference]: Finished difference Result 32064 states and 60540 transitions. [2021-03-10 18:15:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 18:15:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 430 [2021-03-10 18:15:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:15:56,589 INFO L225 Difference]: With dead ends: 32064 [2021-03-10 18:15:56,589 INFO L226 Difference]: Without dead ends: 32064 [2021-03-10 18:15:56,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 18:15:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32064 states. [2021-03-10 18:15:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32064 to 31640. [2021-03-10 18:15:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31640 states, 31639 states have (on average 1.8917475267865609) internal successors, (59853), 31639 states have internal predecessors, (59853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:15:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31640 states to 31640 states and 59853 transitions. [2021-03-10 18:15:56,882 INFO L78 Accepts]: Start accepts. Automaton has 31640 states and 59853 transitions. Word has length 430 [2021-03-10 18:15:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:15:56,882 INFO L480 AbstractCegarLoop]: Abstraction has 31640 states and 59853 transitions. [2021-03-10 18:15:56,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:15:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 31640 states and 59853 transitions. [2021-03-10 18:15:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-03-10 18:15:56,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:15:56,910 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:15:56,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-03-10 18:15:56,910 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:15:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:15:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash -819169538, now seen corresponding path program 34 times [2021-03-10 18:15:56,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:15:56,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917574175] [2021-03-10 18:15:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:15:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:16:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:16:02,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917574175] [2021-03-10 18:16:02,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876092428] [2021-03-10 18:16:02,231 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:16:02,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 18:16:02,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:16:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 165 conjunts are in the unsatisfiable core [2021-03-10 18:16:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:16:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:16:05,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:16:05,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-03-10 18:16:05,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913320791] [2021-03-10 18:16:05,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-03-10 18:16:05,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:16:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-03-10 18:16:05,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 18:16:05,025 INFO L87 Difference]: Start difference. First operand 31640 states and 59853 transitions. Second operand has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:17:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:17:03,129 INFO L93 Difference]: Finished difference Result 166472 states and 318652 transitions. [2021-03-10 18:17:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-03-10 18:17:03,130 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 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 430 [2021-03-10 18:17:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:17:03,277 INFO L225 Difference]: With dead ends: 166472 [2021-03-10 18:17:03,277 INFO L226 Difference]: Without dead ends: 166448 [2021-03-10 18:17:03,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33399 ImplicationChecksByTransitivity, 22003.5ms TimeCoverageRelationStatistics Valid=1183, Invalid=104767, Unknown=0, NotChecked=0, Total=105950 [2021-03-10 18:17:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166448 states. [2021-03-10 18:17:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166448 to 33008. [2021-03-10 18:17:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33008 states, 33007 states have (on average 1.8911140061199139) internal successors, (62420), 33007 states have internal predecessors, (62420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:17:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33008 states to 33008 states and 62420 transitions. [2021-03-10 18:17:04,117 INFO L78 Accepts]: Start accepts. Automaton has 33008 states and 62420 transitions. Word has length 430 [2021-03-10 18:17:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:17:04,117 INFO L480 AbstractCegarLoop]: Abstraction has 33008 states and 62420 transitions. [2021-03-10 18:17:04,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:17:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 33008 states and 62420 transitions. [2021-03-10 18:17:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-03-10 18:17:04,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:17:04,355 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:17:04,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 18:17:04,555 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:17:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:17:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash 154289706, now seen corresponding path program 35 times [2021-03-10 18:17:04,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:17:04,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422004681] [2021-03-10 18:17:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:17:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:17:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:17:09,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422004681] [2021-03-10 18:17:09,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574488722] [2021-03-10 18:17:09,759 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:17:09,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-03-10 18:17:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:17:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-03-10 18:17:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:17:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:17:12,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:17:12,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-03-10 18:17:12,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383670726] [2021-03-10 18:17:12,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-03-10 18:17:12,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:17:12,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-03-10 18:17:12,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 18:17:12,452 INFO L87 Difference]: Start difference. First operand 33008 states and 62420 transitions. Second operand has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:18:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:18:12,741 INFO L93 Difference]: Finished difference Result 151887 states and 290614 transitions. [2021-03-10 18:18:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2021-03-10 18:18:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 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 430 [2021-03-10 18:18:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:18:12,882 INFO L225 Difference]: With dead ends: 151887 [2021-03-10 18:18:12,882 INFO L226 Difference]: Without dead ends: 151875 [2021-03-10 18:18:12,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28197 ImplicationChecksByTransitivity, 22438.0ms TimeCoverageRelationStatistics Valid=1090, Invalid=91630, Unknown=0, NotChecked=0, Total=92720 [2021-03-10 18:18:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151875 states. [2021-03-10 18:18:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151875 to 33073. [2021-03-10 18:18:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 1.8912373004354137) internal successors, (62547), 33072 states have internal predecessors, (62547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:18:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 62547 transitions. [2021-03-10 18:18:13,720 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 62547 transitions. Word has length 430 [2021-03-10 18:18:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:18:13,720 INFO L480 AbstractCegarLoop]: Abstraction has 33073 states and 62547 transitions. [2021-03-10 18:18:13,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:18:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 62547 transitions. [2021-03-10 18:18:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-03-10 18:18:13,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:18:13,750 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:18:13,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 18:18:13,950 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:18:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:18:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash -347343932, now seen corresponding path program 36 times [2021-03-10 18:18:13,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:18:13,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25414688] [2021-03-10 18:18:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:18:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:18:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:18:19,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25414688] [2021-03-10 18:18:19,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185469259] [2021-03-10 18:18:19,825 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:18:20,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-03-10 18:18:20,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:18:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 170 conjunts are in the unsatisfiable core [2021-03-10 18:18:20,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:18:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:18:23,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:18:23,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-03-10 18:18:23,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633903178] [2021-03-10 18:18:23,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-03-10 18:18:23,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:18:23,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-03-10 18:18:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 18:18:23,133 INFO L87 Difference]: Start difference. First operand 33073 states and 62547 transitions. Second operand has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:19:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:19:37,905 INFO L93 Difference]: Finished difference Result 185587 states and 355431 transitions. [2021-03-10 18:19:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 347 states. [2021-03-10 18:19:37,907 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 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 430 [2021-03-10 18:19:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:19:38,076 INFO L225 Difference]: With dead ends: 185587 [2021-03-10 18:19:38,076 INFO L226 Difference]: Without dead ends: 185551 [2021-03-10 18:19:38,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40168 ImplicationChecksByTransitivity, 28004.3ms TimeCoverageRelationStatistics Valid=1294, Invalid=122258, Unknown=0, NotChecked=0, Total=123552 [2021-03-10 18:19:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185551 states. [2021-03-10 18:19:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185551 to 34370. [2021-03-10 18:19:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34370 states, 34369 states have (on average 1.8906863743489772) internal successors, (64981), 34369 states have internal predecessors, (64981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:19:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34370 states to 34370 states and 64981 transitions. [2021-03-10 18:19:39,102 INFO L78 Accepts]: Start accepts. Automaton has 34370 states and 64981 transitions. Word has length 430 [2021-03-10 18:19:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:19:39,103 INFO L480 AbstractCegarLoop]: Abstraction has 34370 states and 64981 transitions. [2021-03-10 18:19:39,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:19:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 34370 states and 64981 transitions. [2021-03-10 18:19:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-03-10 18:19:39,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:19:39,132 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:19:39,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-10 18:19:39,335 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:19:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:19:39,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1069295958, now seen corresponding path program 37 times [2021-03-10 18:19:39,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:19:39,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052355298] [2021-03-10 18:19:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:19:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:19:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:19:45,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052355298] [2021-03-10 18:19:45,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002115850] [2021-03-10 18:19:45,376 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:19:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:19:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-03-10 18:19:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:19:46,054 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-03-10 18:19:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:19:48,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:19:48,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-03-10 18:19:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485237903] [2021-03-10 18:19:48,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-03-10 18:19:48,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:19:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-03-10 18:19:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 18:19:48,754 INFO L87 Difference]: Start difference. First operand 34370 states and 64981 transitions. Second operand has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:20:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 18:20:59,195 INFO L93 Difference]: Finished difference Result 153314 states and 293297 transitions. [2021-03-10 18:20:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2021-03-10 18:20:59,197 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 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 430 [2021-03-10 18:20:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 18:20:59,348 INFO L225 Difference]: With dead ends: 153314 [2021-03-10 18:20:59,348 INFO L226 Difference]: Without dead ends: 153302 [2021-03-10 18:20:59,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28435 ImplicationChecksByTransitivity, 26126.3ms TimeCoverageRelationStatistics Valid=1094, Invalid=92236, Unknown=0, NotChecked=0, Total=93330 [2021-03-10 18:20:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153302 states. [2021-03-10 18:21:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153302 to 34475. [2021-03-10 18:21:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34475 states, 34474 states have (on average 1.8908452746997737) internal successors, (65185), 34474 states have internal predecessors, (65185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:21:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34475 states to 34475 states and 65185 transitions. [2021-03-10 18:21:00,411 INFO L78 Accepts]: Start accepts. Automaton has 34475 states and 65185 transitions. Word has length 430 [2021-03-10 18:21:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 18:21:00,411 INFO L480 AbstractCegarLoop]: Abstraction has 34475 states and 65185 transitions. [2021-03-10 18:21:00,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 18:21:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 34475 states and 65185 transitions. [2021-03-10 18:21:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-03-10 18:21:00,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 18:21:00,442 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 18:21:00,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 18:21:00,643 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 18:21:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 18:21:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash 567662320, now seen corresponding path program 38 times [2021-03-10 18:21:00,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 18:21:00,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168370675] [2021-03-10 18:21:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 18:21:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 18:21:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:21:07,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168370675] [2021-03-10 18:21:07,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506277807] [2021-03-10 18:21:07,314 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 18:21:07,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 18:21:07,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 18:21:07,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-03-10 18:21:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 18:21:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 18:21:10,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 18:21:10,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-03-10 18:21:10,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867528931] [2021-03-10 18:21:10,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-03-10 18:21:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 18:21:10,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-03-10 18:21:10,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 18:21:10,650 INFO L87 Difference]: Start difference. First operand 34475 states and 65185 transitions. Second operand has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 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... [2021-03-10 18:22:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-03-10 18:22:19,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 18:22:19,785 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 18:22:19,788 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 18:22:19,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 06:22:19 BasicIcfg [2021-03-10 18:22:19,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 18:22:19,789 INFO L168 Benchmark]: Toolchain (without parser) took 786083.30 ms. Allocated memory was 356.5 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 318.5 MB in the beginning and 519.9 MB in the end (delta: -201.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 16.0 GB. [2021-03-10 18:22:19,789 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.8 MB in the beginning and 337.7 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 18:22:19,789 INFO L168 Benchmark]: CACSL2BoogieTranslator took 523.70 ms. Allocated memory is still 356.5 MB. Free memory was 317.9 MB in the beginning and 266.1 MB in the end (delta: 51.7 MB). Peak memory consumption was 54.5 MB. Max. memory is 16.0 GB. [2021-03-10 18:22:19,789 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.17 ms. Allocated memory is still 356.5 MB. Free memory was 266.1 MB in the beginning and 264.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 18:22:19,789 INFO L168 Benchmark]: Boogie Preprocessor took 25.98 ms. Allocated memory is still 356.5 MB. Free memory was 264.0 MB in the beginning and 262.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 18:22:19,789 INFO L168 Benchmark]: RCFGBuilder took 890.34 ms. Allocated memory is still 356.5 MB. Free memory was 262.7 MB in the beginning and 236.8 MB in the end (delta: 25.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2021-03-10 18:22:19,789 INFO L168 Benchmark]: TraceAbstraction took 784589.30 ms. Allocated memory was 356.5 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 236.0 MB in the beginning and 519.9 MB in the end (delta: -283.8 MB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-03-10 18:22:19,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.8 MB in the beginning and 337.7 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 523.70 ms. Allocated memory is still 356.5 MB. Free memory was 317.9 MB in the beginning and 266.1 MB in the end (delta: 51.7 MB). Peak memory consumption was 54.5 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 47.17 ms. Allocated memory is still 356.5 MB. Free memory was 266.1 MB in the beginning and 264.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.98 ms. Allocated memory is still 356.5 MB. Free memory was 264.0 MB in the beginning and 262.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 890.34 ms. Allocated memory is still 356.5 MB. Free memory was 262.7 MB in the beginning and 236.8 MB in the end (delta: 25.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 784589.30 ms. Allocated memory was 356.5 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 236.0 MB in the beginning and 519.9 MB in the end (delta: -283.8 MB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable (line 13). Cancelled while BasicCegarLoop was constructing difference of abstraction (34475states) and FLOYD_HOARE automaton (currently 262 states, 70 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 290 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 80 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 784506.1ms, OverallIterations: 41, TraceHistogramMax: 20, EmptinessCheckTime: 805.7ms, AutomataDifference: 673051.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28980 SDtfs, 120396 SDslu, 1648609 SDs, 0 SdLazy, 268001 SolverSat, 7379 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 119192.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21350 GetRequests, 14341 SyntacticMatches, 12 SemanticMatches, 6996 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926825 ImplicationChecksByTransitivity, 402528.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39725occurred in iteration=35, InterpolantAutomatonStates: 6331, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9682.0ms AutomataMinimizationTime, 40 MinimizatonAttempts, 751938 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 906.8ms SsaConstructionTime, 4577.3ms SatisfiabilityAnalysisTime, 85892.0ms InterpolantComputationTime, 21154 NumberOfCodeBlocks, 20844 NumberOfCodeBlocksAsserted, 310 NumberOfCheckSat, 21075 ConstructedInterpolants, 0 QuantifiedInterpolants, 62455 SizeOfPredicates, 875 NumberOfNonLiveVariables, 20511 ConjunctsInSsa, 1693 ConjunctsInUnsatCore, 79 InterpolantComputations, 4 PerfectInterpolantSequences, 47447/131262 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