/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 12:58:59,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 12:58:59,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 12:59:00,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 12:59:00,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 12:59:00,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 12:59:00,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 12:59:00,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 12:59:00,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 12:59:00,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 12:59:00,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 12:59:00,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 12:59:00,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 12:59:00,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 12:59:00,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 12:59:00,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 12:59:00,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 12:59:00,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 12:59:00,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 12:59:00,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 12:59:00,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 12:59:00,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 12:59:00,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 12:59:00,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 12:59:00,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-12 12:59:00,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-12 12:59:00,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-12 12:59:00,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-12 12:59:00,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-12 12:59:00,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-12 12:59:00,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 12:59:00,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 12:59:00,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 12:59:00,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 12:59:00,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 12:59:00,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 12:59:00,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 12:59:00,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 12:59:00,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 12:59:00,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 12:59:00,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 12:59:00,146 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-New_States.epf [2020-11-12 12:59:00,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 12:59:00,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 12:59:00,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 12:59:00,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 12:59:00,209 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 12:59:00,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 12:59:00,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 12:59:00,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 12:59:00,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 12:59:00,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 12:59:00,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 12:59:00,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 12:59:00,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 12:59:00,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 12:59:00,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 12:59:00,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 12:59:00,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 12:59:00,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 12:59:00,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 12:59:00,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 12:59:00,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 12:59:00,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 12:59:00,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 12:59:00,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 12:59:00,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 12:59:00,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 12:59:00,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 12:59:00,216 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 12:59:00,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 12:59:00,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 12:59:00,217 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=NEW_STATES 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 12:59:00,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 12:59:00,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 12:59:00,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 12:59:00,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 12:59:00,705 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 12:59:00,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-11-12 12:59:00,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a51b46e/650ecf10e4694eeb9464892de368e2ea/FLAG9ec273d29 [2020-11-12 12:59:01,612 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 12:59:01,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-11-12 12:59:01,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a51b46e/650ecf10e4694eeb9464892de368e2ea/FLAG9ec273d29 [2020-11-12 12:59:01,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a51b46e/650ecf10e4694eeb9464892de368e2ea [2020-11-12 12:59:01,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 12:59:01,812 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 12:59:01,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 12:59:01,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 12:59:01,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 12:59:01,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:01" (1/1) ... [2020-11-12 12:59:01,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc47928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:01, skipping insertion in model container [2020-11-12 12:59:01,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:01" (1/1) ... [2020-11-12 12:59:01,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 12:59:01,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 12:59:02,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 12:59:02,514 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 12:59:02,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 12:59:02,812 INFO L208 MainTranslator]: Completed translation [2020-11-12 12:59:02,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02 WrapperNode [2020-11-12 12:59:02,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 12:59:02,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 12:59:02,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 12:59:02,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 12:59:02,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 12:59:02,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 12:59:02,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 12:59:02,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 12:59:02,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 12:59:02,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 12:59:02,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 12:59:02,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 12:59:02,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 12:59:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 12:59:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 12:59:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-12 12:59:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 12:59:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-11-12 12:59:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-11-12 12:59:02,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-11-12 12:59:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 12:59:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 12:59:02,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 12:59:02,995 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 12:59:03,570 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 12:59:03,570 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-12 12:59:03,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:03 BoogieIcfgContainer [2020-11-12 12:59:03,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 12:59:03,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 12:59:03,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 12:59:03,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 12:59:03,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:01" (1/3) ... [2020-11-12 12:59:03,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c016cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:03, skipping insertion in model container [2020-11-12 12:59:03,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02" (2/3) ... [2020-11-12 12:59:03,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c016cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:03, skipping insertion in model container [2020-11-12 12:59:03,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:03" (3/3) ... [2020-11-12 12:59:03,582 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-11-12 12:59:03,600 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 12:59:03,601 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 12:59:03,605 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 12:59:03,606 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 12:59:03,643 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,643 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,644 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,644 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,644 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,644 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,644 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,645 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,645 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,645 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,645 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,646 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,646 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,646 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,646 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,646 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,647 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,647 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,647 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,647 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,648 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,648 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,648 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,648 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,649 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,649 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,649 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,649 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,650 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,650 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,650 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,650 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,650 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,651 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,652 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,652 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,652 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,652 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,656 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,656 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,656 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,656 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,657 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,657 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,657 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,657 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,658 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:03,667 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-11-12 12:59:03,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-12 12:59:03,705 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 12:59:03,706 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 12:59:03,706 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 12:59:03,706 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 12:59:03,706 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 12:59:03,706 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 12:59:03,706 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 12:59:03,707 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 12:59:03,720 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 86 places, 90 transitions, 188 flow [2020-11-12 12:59:03,749 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 320 states, 318 states have (on average 2.0251572327044025) internal successors, (644), 319 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:03,995 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 243ms [2020-11-12 12:59:03,997 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 320 states, 318 states have (on average 2.0251572327044025) internal successors, (644), 319 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,000 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 685 states, 623 states have (on average 1.2231139646869984) internal successors, (762), 684 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 685 states, 623 states have (on average 1.2231139646869984) internal successors, (762), 684 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-12 12:59:04,016 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:04,017 INFO L494 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] [2020-11-12 12:59:04,017 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1521639703, now seen corresponding path program 1 times [2020-11-12 12:59:04,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:04,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151258014] [2020-11-12 12:59:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:04,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151258014] [2020-11-12 12:59:04,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 12:59:04,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-12 12:59:04,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022297248] [2020-11-12 12:59:04,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-12 12:59:04,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-12 12:59:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-12 12:59:04,386 INFO L87 Difference]: Start difference. First operand has 685 states, 623 states have (on average 1.2231139646869984) internal successors, (762), 684 states have internal predecessors, (762), 0 states have call successors, (0), 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 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:04,410 INFO L93 Difference]: Finished difference Result 359 states and 431 transitions. [2020-11-12 12:59:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-12 12:59:04,412 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2020-11-12 12:59:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:04,423 INFO L225 Difference]: With dead ends: 359 [2020-11-12 12:59:04,424 INFO L226 Difference]: Without dead ends: 149 [2020-11-12 12:59:04,425 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-12 12:59:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-12 12:59:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2020-11-12 12:59:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 143 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2020-11-12 12:59:04,470 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 52 [2020-11-12 12:59:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:04,471 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2020-11-12 12:59:04,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2020-11-12 12:59:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-12 12:59:04,474 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:04,474 INFO L494 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] [2020-11-12 12:59:04,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 12:59:04,475 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash 383764825, now seen corresponding path program 1 times [2020-11-12 12:59:04,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:04,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6279680] [2020-11-12 12:59:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:04,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6279680] [2020-11-12 12:59:04,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 12:59:04,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-12 12:59:04,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252047940] [2020-11-12 12:59:04,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-12 12:59:04,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-12 12:59:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-12 12:59:04,597 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:04,626 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2020-11-12 12:59:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-12 12:59:04,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2020-11-12 12:59:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:04,630 INFO L225 Difference]: With dead ends: 206 [2020-11-12 12:59:04,630 INFO L226 Difference]: Without dead ends: 206 [2020-11-12 12:59:04,631 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-12 12:59:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-12 12:59:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 145. [2020-11-12 12:59:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1458333333333333) internal successors, (165), 144 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2020-11-12 12:59:04,647 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 52 [2020-11-12 12:59:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:04,648 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2020-11-12 12:59:04,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2020-11-12 12:59:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-12 12:59:04,651 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:04,651 INFO L494 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] [2020-11-12 12:59:04,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 12:59:04,652 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1419391313, now seen corresponding path program 1 times [2020-11-12 12:59:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:04,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190233968] [2020-11-12 12:59:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190233968] [2020-11-12 12:59:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693640781] [2020-11-12 12:59:04,774 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 [2020-11-12 12:59:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-12 12:59:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-12 12:59:04,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-12 12:59:04,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-11-12 12:59:04,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815345086] [2020-11-12 12:59:04,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-12 12:59:04,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-12 12:59:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 12:59:04,954 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:04,976 INFO L93 Difference]: Finished difference Result 217 states and 253 transitions. [2020-11-12 12:59:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-12 12:59:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2020-11-12 12:59:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:04,980 INFO L225 Difference]: With dead ends: 217 [2020-11-12 12:59:04,980 INFO L226 Difference]: Without dead ends: 217 [2020-11-12 12:59:04,980 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 12:59:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-11-12 12:59:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 146. [2020-11-12 12:59:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1448275862068966) internal successors, (166), 145 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2020-11-12 12:59:04,996 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 60 [2020-11-12 12:59:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:04,997 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2020-11-12 12:59:04,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2020-11-12 12:59:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 12:59:05,003 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:05,003 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:05,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-12 12:59:05,221 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:05,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1086520751, now seen corresponding path program 1 times [2020-11-12 12:59:05,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:05,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510546240] [2020-11-12 12:59:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:05,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510546240] [2020-11-12 12:59:05,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085537304] [2020-11-12 12:59:05,314 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 [2020-11-12 12:59:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:05,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-12 12:59:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:05,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:05,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-12 12:59:05,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922800652] [2020-11-12 12:59:05,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 12:59:05,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:05,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 12:59:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-12 12:59:05,493 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:05,545 INFO L93 Difference]: Finished difference Result 285 states and 331 transitions. [2020-11-12 12:59:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-12 12:59:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 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 71 [2020-11-12 12:59:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:05,549 INFO L225 Difference]: With dead ends: 285 [2020-11-12 12:59:05,549 INFO L226 Difference]: Without dead ends: 285 [2020-11-12 12:59:05,550 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-12 12:59:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-11-12 12:59:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 217. [2020-11-12 12:59:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1481481481481481) internal successors, (248), 216 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 248 transitions. [2020-11-12 12:59:05,567 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 248 transitions. Word has length 71 [2020-11-12 12:59:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:05,567 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 248 transitions. [2020-11-12 12:59:05,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 248 transitions. [2020-11-12 12:59:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-12 12:59:05,569 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:05,569 INFO L494 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, 1, 1] [2020-11-12 12:59:05,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:05,783 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1736768871, now seen corresponding path program 2 times [2020-11-12 12:59:05,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:05,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926047018] [2020-11-12 12:59:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-12 12:59:05,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926047018] [2020-11-12 12:59:05,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854496375] [2020-11-12 12:59:05,939 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 [2020-11-12 12:59:06,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 12:59:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-12 12:59:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-12 12:59:06,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:06,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-12 12:59:06,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341764575] [2020-11-12 12:59:06,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 12:59:06,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 12:59:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-12 12:59:06,081 INFO L87 Difference]: Start difference. First operand 217 states and 248 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:06,133 INFO L93 Difference]: Finished difference Result 469 states and 548 transitions. [2020-11-12 12:59:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-12 12:59:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2020-11-12 12:59:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:06,138 INFO L225 Difference]: With dead ends: 469 [2020-11-12 12:59:06,138 INFO L226 Difference]: Without dead ends: 469 [2020-11-12 12:59:06,139 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-12 12:59:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-11-12 12:59:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 321. [2020-11-12 12:59:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.175) internal successors, (376), 320 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 376 transitions. [2020-11-12 12:59:06,160 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 376 transitions. Word has length 79 [2020-11-12 12:59:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:06,161 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 376 transitions. [2020-11-12 12:59:06,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 376 transitions. [2020-11-12 12:59:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-12 12:59:06,163 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:06,163 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:06,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:06,377 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:06,378 INFO L82 PathProgramCache]: Analyzing trace with hash -842919997, now seen corresponding path program 3 times [2020-11-12 12:59:06,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:06,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180682011] [2020-11-12 12:59:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-12 12:59:06,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180682011] [2020-11-12 12:59:06,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272955324] [2020-11-12 12:59:06,550 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 [2020-11-12 12:59:06,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 12:59:06,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-12 12:59:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-12 12:59:06,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:06,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-12 12:59:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604594694] [2020-11-12 12:59:06,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-12 12:59:06,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-12 12:59:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-12 12:59:06,792 INFO L87 Difference]: Start difference. First operand 321 states and 376 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:06,886 INFO L93 Difference]: Finished difference Result 599 states and 702 transitions. [2020-11-12 12:59:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-12 12:59:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2020-11-12 12:59:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:06,893 INFO L225 Difference]: With dead ends: 599 [2020-11-12 12:59:06,893 INFO L226 Difference]: Without dead ends: 599 [2020-11-12 12:59:06,893 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-11-12 12:59:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-11-12 12:59:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 451. [2020-11-12 12:59:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.1777777777777778) internal successors, (530), 450 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 530 transitions. [2020-11-12 12:59:06,918 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 530 transitions. Word has length 90 [2020-11-12 12:59:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:06,919 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 530 transitions. [2020-11-12 12:59:06,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 530 transitions. [2020-11-12 12:59:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 12:59:06,922 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:06,922 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-12 12:59:07,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:07,138 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1633287079, now seen corresponding path program 4 times [2020-11-12 12:59:07,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:07,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365737338] [2020-11-12 12:59:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-12 12:59:07,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365737338] [2020-11-12 12:59:07,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846033905] [2020-11-12 12:59:07,379 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 [2020-11-12 12:59:07,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 12:59:07,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:07,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-12 12:59:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-12 12:59:07,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:07,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-11-12 12:59:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60230631] [2020-11-12 12:59:07,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 12:59:07,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 12:59:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-12 12:59:07,596 INFO L87 Difference]: Start difference. First operand 451 states and 530 transitions. Second operand has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:09,035 INFO L93 Difference]: Finished difference Result 1325 states and 1578 transitions. [2020-11-12 12:59:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-11-12 12:59:09,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 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 101 [2020-11-12 12:59:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:09,045 INFO L225 Difference]: With dead ends: 1325 [2020-11-12 12:59:09,045 INFO L226 Difference]: Without dead ends: 1325 [2020-11-12 12:59:09,048 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=992, Invalid=3838, Unknown=0, NotChecked=0, Total=4830 [2020-11-12 12:59:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2020-11-12 12:59:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 829. [2020-11-12 12:59:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 1.1871980676328502) internal successors, (983), 828 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 983 transitions. [2020-11-12 12:59:09,094 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 983 transitions. Word has length 101 [2020-11-12 12:59:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:09,095 INFO L481 AbstractCegarLoop]: Abstraction has 829 states and 983 transitions. [2020-11-12 12:59:09,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 983 transitions. [2020-11-12 12:59:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-12 12:59:09,100 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:09,100 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:09,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-12 12:59:09,315 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:09,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1295194387, now seen corresponding path program 5 times [2020-11-12 12:59:09,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:09,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454531768] [2020-11-12 12:59:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 3 proven. 70 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-12 12:59:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454531768] [2020-11-12 12:59:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350714518] [2020-11-12 12:59:09,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 12:59:09,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 12:59:09,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-12 12:59:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-12 12:59:09,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:09,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-11-12 12:59:09,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600964128] [2020-11-12 12:59:09,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 12:59:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 12:59:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-12 12:59:09,823 INFO L87 Difference]: Start difference. First operand 829 states and 983 transitions. Second operand has 18 states, 18 states have (on average 8.38888888888889) internal successors, (151), 18 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:12,497 INFO L93 Difference]: Finished difference Result 1949 states and 2325 transitions. [2020-11-12 12:59:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-11-12 12:59:12,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.38888888888889) internal successors, (151), 18 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2020-11-12 12:59:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:12,509 INFO L225 Difference]: With dead ends: 1949 [2020-11-12 12:59:12,509 INFO L226 Difference]: Without dead ends: 1949 [2020-11-12 12:59:12,516 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4811 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2412, Invalid=10470, Unknown=0, NotChecked=0, Total=12882 [2020-11-12 12:59:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2020-11-12 12:59:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1329. [2020-11-12 12:59:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1328 states have (on average 1.1912650602409638) internal successors, (1582), 1328 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1582 transitions. [2020-11-12 12:59:12,553 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1582 transitions. Word has length 120 [2020-11-12 12:59:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:12,553 INFO L481 AbstractCegarLoop]: Abstraction has 1329 states and 1582 transitions. [2020-11-12 12:59:12,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 8.38888888888889) internal successors, (151), 18 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1582 transitions. [2020-11-12 12:59:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-12 12:59:12,561 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:12,561 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:12,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:12,776 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash -469982739, now seen corresponding path program 6 times [2020-11-12 12:59:12,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:12,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684432003] [2020-11-12 12:59:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 115 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-12 12:59:12,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684432003] [2020-11-12 12:59:12,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234723176] [2020-11-12 12:59:12,987 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 [2020-11-12 12:59:13,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-12 12:59:13,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:13,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 12:59:13,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 115 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-12 12:59:13,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:13,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 12:59:13,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972101694] [2020-11-12 12:59:13,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 12:59:13,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 12:59:13,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-12 12:59:13,234 INFO L87 Difference]: Start difference. First operand 1329 states and 1582 transitions. Second operand has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:13,498 INFO L93 Difference]: Finished difference Result 1871 states and 2220 transitions. [2020-11-12 12:59:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 12:59:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 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 [2020-11-12 12:59:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:13,508 INFO L225 Difference]: With dead ends: 1871 [2020-11-12 12:59:13,508 INFO L226 Difference]: Without dead ends: 1871 [2020-11-12 12:59:13,509 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-11-12 12:59:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2020-11-12 12:59:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1581. [2020-11-12 12:59:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.191139240506329) internal successors, (1882), 1580 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 1882 transitions. [2020-11-12 12:59:13,565 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 1882 transitions. Word has length 139 [2020-11-12 12:59:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:13,566 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 1882 transitions. [2020-11-12 12:59:13,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 1882 transitions. [2020-11-12 12:59:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-11-12 12:59:13,571 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:13,571 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:13,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:13,785 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:13,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936169, now seen corresponding path program 7 times [2020-11-12 12:59:13,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:13,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057639665] [2020-11-12 12:59:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-12 12:59:14,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057639665] [2020-11-12 12:59:14,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051976357] [2020-11-12 12:59:14,121 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 [2020-11-12 12:59:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:14,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 12:59:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 21 proven. 52 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-11-12 12:59:14,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:14,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2020-11-12 12:59:14,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878793283] [2020-11-12 12:59:14,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 12:59:14,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:14,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 12:59:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-11-12 12:59:14,471 INFO L87 Difference]: Start difference. First operand 1581 states and 1882 transitions. Second operand has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:20,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:20,674 INFO L93 Difference]: Finished difference Result 3061 states and 3656 transitions. [2020-11-12 12:59:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2020-11-12 12:59:20,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 0 states have call successors, (0), 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 150 [2020-11-12 12:59:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:20,687 INFO L225 Difference]: With dead ends: 3061 [2020-11-12 12:59:20,688 INFO L226 Difference]: Without dead ends: 3061 [2020-11-12 12:59:20,700 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15307 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6555, Invalid=31275, Unknown=0, NotChecked=0, Total=37830 [2020-11-12 12:59:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2020-11-12 12:59:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 2264. [2020-11-12 12:59:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 1.1931064958020328) internal successors, (2700), 2263 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 2700 transitions. [2020-11-12 12:59:20,756 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 2700 transitions. Word has length 150 [2020-11-12 12:59:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:20,756 INFO L481 AbstractCegarLoop]: Abstraction has 2264 states and 2700 transitions. [2020-11-12 12:59:20,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 2700 transitions. [2020-11-12 12:59:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-12 12:59:20,762 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:20,763 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:20,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-12 12:59:20,979 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 566864535, now seen corresponding path program 8 times [2020-11-12 12:59:20,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:20,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608617521] [2020-11-12 12:59:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 5 proven. 238 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-12 12:59:21,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608617521] [2020-11-12 12:59:21,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920827764] [2020-11-12 12:59:21,316 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 [2020-11-12 12:59:21,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 12:59:21,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 12:59:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 5 proven. 238 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-12 12:59:21,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:21,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 12:59:21,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081072870] [2020-11-12 12:59:21,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 12:59:21,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 12:59:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-11-12 12:59:21,561 INFO L87 Difference]: Start difference. First operand 2264 states and 2700 transitions. Second operand has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:21,915 INFO L93 Difference]: Finished difference Result 2938 states and 3494 transitions. [2020-11-12 12:59:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 12:59:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2020-11-12 12:59:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:21,928 INFO L225 Difference]: With dead ends: 2938 [2020-11-12 12:59:21,928 INFO L226 Difference]: Without dead ends: 2938 [2020-11-12 12:59:21,929 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 12:59:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-11-12 12:59:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2577. [2020-11-12 12:59:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.1929347826086956) internal successors, (3073), 2576 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 3073 transitions. [2020-11-12 12:59:21,983 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 3073 transitions. Word has length 169 [2020-11-12 12:59:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:21,984 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 3073 transitions. [2020-11-12 12:59:21,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 3073 transitions. [2020-11-12 12:59:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-11-12 12:59:21,991 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:21,992 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:22,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:22,207 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:22,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1338185919, now seen corresponding path program 9 times [2020-11-12 12:59:22,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:22,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739468421] [2020-11-12 12:59:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 5 proven. 316 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-12 12:59:22,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739468421] [2020-11-12 12:59:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349112740] [2020-11-12 12:59:22,537 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 [2020-11-12 12:59:22,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 12:59:22,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:22,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 12:59:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-11-12 12:59:23,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:23,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2020-11-12 12:59:23,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804290371] [2020-11-12 12:59:23,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-12 12:59:23,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-12 12:59:23,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-11-12 12:59:23,072 INFO L87 Difference]: Start difference. First operand 2577 states and 3073 transitions. Second operand has 30 states, 30 states have (on average 7.033333333333333) internal successors, (211), 30 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:36,305 INFO L93 Difference]: Finished difference Result 4417 states and 5279 transitions. [2020-11-12 12:59:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2020-11-12 12:59:36,306 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.033333333333333) internal successors, (211), 30 states have internal predecessors, (211), 0 states have call successors, (0), 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 180 [2020-11-12 12:59:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:36,321 INFO L225 Difference]: With dead ends: 4417 [2020-11-12 12:59:36,322 INFO L226 Difference]: Without dead ends: 4417 [2020-11-12 12:59:36,333 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37053 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=14404, Invalid=72916, Unknown=0, NotChecked=0, Total=87320 [2020-11-12 12:59:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2020-11-12 12:59:36,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 3443. [2020-11-12 12:59:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 1.1940732132481116) internal successors, (4110), 3442 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 4110 transitions. [2020-11-12 12:59:36,409 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 4110 transitions. Word has length 180 [2020-11-12 12:59:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:36,409 INFO L481 AbstractCegarLoop]: Abstraction has 3443 states and 4110 transitions. [2020-11-12 12:59:36,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 7.033333333333333) internal successors, (211), 30 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 4110 transitions. [2020-11-12 12:59:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-12 12:59:36,419 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:36,419 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:36,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:36,633 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash 359061825, now seen corresponding path program 10 times [2020-11-12 12:59:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:36,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435376777] [2020-11-12 12:59:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 6 proven. 405 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-11-12 12:59:36,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435376777] [2020-11-12 12:59:36,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151562200] [2020-11-12 12:59:36,980 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 [2020-11-12 12:59:37,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 12:59:37,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:37,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 12:59:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 33 proven. 126 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2020-11-12 12:59:37,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:37,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2020-11-12 12:59:37,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686504253] [2020-11-12 12:59:37,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-12 12:59:37,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:37,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-12 12:59:37,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2020-11-12 12:59:37,511 INFO L87 Difference]: Start difference. First operand 3443 states and 4110 transitions. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:58,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:58,522 INFO L93 Difference]: Finished difference Result 5529 states and 6610 transitions. [2020-11-12 12:59:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 365 states. [2020-11-12 12:59:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 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 199 [2020-11-12 12:59:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:58,543 INFO L225 Difference]: With dead ends: 5529 [2020-11-12 12:59:58,543 INFO L226 Difference]: Without dead ends: 5529 [2020-11-12 12:59:58,551 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62689 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=23115, Invalid=120905, Unknown=0, NotChecked=0, Total=144020 [2020-11-12 12:59:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2020-11-12 12:59:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 4431. [2020-11-12 12:59:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 1.1948081264108352) internal successors, (5293), 4430 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5293 transitions. [2020-11-12 12:59:58,642 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5293 transitions. Word has length 199 [2020-11-12 12:59:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:58,642 INFO L481 AbstractCegarLoop]: Abstraction has 4431 states and 5293 transitions. [2020-11-12 12:59:58,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5293 transitions. [2020-11-12 12:59:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-11-12 12:59:58,654 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:58,655 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:58,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-12 12:59:58,869 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash 149264725, now seen corresponding path program 11 times [2020-11-12 12:59:58,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:58,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824198242] [2020-11-12 12:59:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 7 proven. 505 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-11-12 12:59:59,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824198242] [2020-11-12 12:59:59,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849084942] [2020-11-12 12:59:59,312 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 [2020-11-12 12:59:59,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-12 12:59:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 12:59:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 37 proven. 175 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2020-11-12 12:59:59,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:59,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 38 [2020-11-12 12:59:59,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940465350] [2020-11-12 12:59:59,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-12 12:59:59,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-12 12:59:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2020-11-12 12:59:59,951 INFO L87 Difference]: Start difference. First operand 4431 states and 5293 transitions. Second operand has 38 states, 38 states have (on average 6.552631578947368) internal successors, (249), 38 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:00:32,674 INFO L93 Difference]: Finished difference Result 6763 states and 8087 transitions. [2020-11-12 13:00:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 457 states. [2020-11-12 13:00:32,675 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.552631578947368) internal successors, (249), 38 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2020-11-12 13:00:32,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:00:32,698 INFO L225 Difference]: With dead ends: 6763 [2020-11-12 13:00:32,698 INFO L226 Difference]: Without dead ends: 6763 [2020-11-12 13:00:32,709 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99524 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=35218, Invalid=188984, Unknown=0, NotChecked=0, Total=224202 [2020-11-12 13:00:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2020-11-12 13:00:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 5541. [2020-11-12 13:00:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 5540 states have (on average 1.1953068592057763) internal successors, (6622), 5540 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 6622 transitions. [2020-11-12 13:00:32,815 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 6622 transitions. Word has length 218 [2020-11-12 13:00:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:00:32,816 INFO L481 AbstractCegarLoop]: Abstraction has 5541 states and 6622 transitions. [2020-11-12 13:00:32,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 6.552631578947368) internal successors, (249), 38 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 6622 transitions. [2020-11-12 13:00:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-11-12 13:00:32,831 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:00:32,831 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:00:33,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-12 13:00:33,045 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:00:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:00:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1845245653, now seen corresponding path program 12 times [2020-11-12 13:00:33,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:00:33,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852603647] [2020-11-12 13:00:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:00:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:00:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 8 proven. 616 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-11-12 13:00:33,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852603647] [2020-11-12 13:00:33,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567117148] [2020-11-12 13:00:33,606 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 [2020-11-12 13:00:33,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-12 13:00:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:00:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 13:00:33,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:00:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 8 proven. 616 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-11-12 13:00:34,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:00:34,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-11-12 13:00:34,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659969477] [2020-11-12 13:00:34,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-12 13:00:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:00:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-12 13:00:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-11-12 13:00:34,006 INFO L87 Difference]: Start difference. First operand 5541 states and 6622 transitions. Second operand has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 27 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:00:34,754 INFO L93 Difference]: Finished difference Result 6611 states and 7884 transitions. [2020-11-12 13:00:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 13:00:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 27 states have internal predecessors, (193), 0 states have call successors, (0), 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 237 [2020-11-12 13:00:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:00:34,769 INFO L225 Difference]: With dead ends: 6611 [2020-11-12 13:00:34,769 INFO L226 Difference]: Without dead ends: 6611 [2020-11-12 13:00:34,770 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 13:00:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2020-11-12 13:00:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 6037. [2020-11-12 13:00:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6036 states have (on average 1.1951623591782639) internal successors, (7214), 6036 states have internal predecessors, (7214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 7214 transitions. [2020-11-12 13:00:34,875 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 7214 transitions. Word has length 237 [2020-11-12 13:00:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:00:34,875 INFO L481 AbstractCegarLoop]: Abstraction has 6037 states and 7214 transitions. [2020-11-12 13:00:34,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 27 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 7214 transitions. [2020-11-12 13:00:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-11-12 13:00:34,891 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:00:34,892 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:00:35,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 13:00:35,108 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:00:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:00:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash -793067905, now seen corresponding path program 13 times [2020-11-12 13:00:35,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:00:35,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369466706] [2020-11-12 13:00:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:00:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:00:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 8 proven. 738 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-11-12 13:00:35,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369466706] [2020-11-12 13:00:35,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461638711] [2020-11-12 13:00:35,705 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 [2020-11-12 13:00:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:00:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-12 13:00:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:00:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 45 proven. 232 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-11-12 13:00:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:00:36,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19] total 44 [2020-11-12 13:00:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722438664] [2020-11-12 13:00:36,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-12 13:00:36,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:00:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-12 13:00:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 13:00:36,665 INFO L87 Difference]: Start difference. First operand 6037 states and 7214 transitions. Second operand has 44 states, 44 states have (on average 6.340909090909091) internal successors, (279), 44 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:01:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:01:35,768 INFO L93 Difference]: Finished difference Result 8729 states and 10440 transitions. [2020-11-12 13:01:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 605 states. [2020-11-12 13:01:35,770 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.340909090909091) internal successors, (279), 44 states have internal predecessors, (279), 0 states have call successors, (0), 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 248 [2020-11-12 13:01:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:01:35,783 INFO L225 Difference]: With dead ends: 8729 [2020-11-12 13:01:35,783 INFO L226 Difference]: Without dead ends: 8729 [2020-11-12 13:01:35,800 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 623 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176641 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=59897, Invalid=330103, Unknown=0, NotChecked=0, Total=390000 [2020-11-12 13:01:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8729 states. [2020-11-12 13:01:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8729 to 7330. [2020-11-12 13:01:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7330 states, 7329 states have (on average 1.1955246281893845) internal successors, (8762), 7329 states have internal predecessors, (8762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:01:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7330 states to 7330 states and 8762 transitions. [2020-11-12 13:01:35,903 INFO L78 Accepts]: Start accepts. Automaton has 7330 states and 8762 transitions. Word has length 248 [2020-11-12 13:01:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:01:35,903 INFO L481 AbstractCegarLoop]: Abstraction has 7330 states and 8762 transitions. [2020-11-12 13:01:35,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 6.340909090909091) internal successors, (279), 44 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:01:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7330 states and 8762 transitions. [2020-11-12 13:01:35,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-11-12 13:01:35,923 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:01:35,923 INFO L494 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:01:36,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:01:36,138 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:01:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:01:36,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1370265729, now seen corresponding path program 14 times [2020-11-12 13:01:36,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:01:36,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152137823] [2020-11-12 13:01:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:01:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:01:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 9 proven. 871 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-11-12 13:01:36,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152137823] [2020-11-12 13:01:36,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408789425] [2020-11-12 13:01:36,979 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 [2020-11-12 13:01:37,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 13:01:37,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:01:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-12 13:01:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:01:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 9 proven. 871 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-11-12 13:01:37,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:01:37,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-12 13:01:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850001894] [2020-11-12 13:01:37,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-12 13:01:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:01:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-12 13:01:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-12 13:01:37,295 INFO L87 Difference]: Start difference. First operand 7330 states and 8762 transitions. Second operand has 31 states, 31 states have (on average 6.935483870967742) internal successors, (215), 31 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:01:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:01:38,385 INFO L93 Difference]: Finished difference Result 8532 states and 10180 transitions. [2020-11-12 13:01:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 13:01:38,387 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.935483870967742) internal successors, (215), 31 states have internal predecessors, (215), 0 states have call successors, (0), 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 267 [2020-11-12 13:01:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:01:38,401 INFO L225 Difference]: With dead ends: 8532 [2020-11-12 13:01:38,402 INFO L226 Difference]: Without dead ends: 8532 [2020-11-12 13:01:38,403 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 13:01:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8532 states. [2020-11-12 13:01:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8532 to 7887. [2020-11-12 13:01:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7887 states, 7886 states have (on average 1.1954095866091807) internal successors, (9427), 7886 states have internal predecessors, (9427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:01:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7887 states to 7887 states and 9427 transitions. [2020-11-12 13:01:38,522 INFO L78 Accepts]: Start accepts. Automaton has 7887 states and 9427 transitions. Word has length 267 [2020-11-12 13:01:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:01:38,522 INFO L481 AbstractCegarLoop]: Abstraction has 7887 states and 9427 transitions. [2020-11-12 13:01:38,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 6.935483870967742) internal successors, (215), 31 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:01:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7887 states and 9427 transitions. [2020-11-12 13:01:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-11-12 13:01:38,541 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:01:38,541 INFO L494 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:01:38,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 13:01:38,756 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:01:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:01:38,757 INFO L82 PathProgramCache]: Analyzing trace with hash -725571159, now seen corresponding path program 15 times [2020-11-12 13:01:38,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:01:38,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291734471] [2020-11-12 13:01:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:01:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:01:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 9 proven. 1015 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-11-12 13:01:39,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291734471] [2020-11-12 13:01:39,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779197721] [2020-11-12 13:01:39,586 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 [2020-11-12 13:01:39,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-12 13:01:39,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:01:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 13:01:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:01:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 53 proven. 297 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2020-11-12 13:01:40,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:01:40,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21] total 50 [2020-11-12 13:01:40,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855115147] [2020-11-12 13:01:40,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-12 13:01:40,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:01:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-12 13:01:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 13:01:40,898 INFO L87 Difference]: Start difference. First operand 7887 states and 9427 transitions. Second operand has 50 states, 50 states have (on average 6.18) internal successors, (309), 50 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:03:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:03:26,624 INFO L93 Difference]: Finished difference Result 10939 states and 13085 transitions. [2020-11-12 13:03:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 773 states. [2020-11-12 13:03:26,625 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.18) internal successors, (309), 50 states have internal predecessors, (309), 0 states have call successors, (0), 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 278 [2020-11-12 13:03:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:03:26,645 INFO L225 Difference]: With dead ends: 10939 [2020-11-12 13:03:26,645 INFO L226 Difference]: Without dead ends: 10939 [2020-11-12 13:03:26,691 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 794 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291082 ImplicationChecksByTransitivity, 104.9s TimeCoverageRelationStatistics Valid=95495, Invalid=537325, Unknown=0, NotChecked=0, Total=632820 [2020-11-12 13:03:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10939 states. [2020-11-12 13:03:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10939 to 9363. [2020-11-12 13:03:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9363 states, 9362 states have (on average 1.195684682760094) internal successors, (11194), 9362 states have internal predecessors, (11194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:03:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9363 states to 9363 states and 11194 transitions. [2020-11-12 13:03:26,826 INFO L78 Accepts]: Start accepts. Automaton has 9363 states and 11194 transitions. Word has length 278 [2020-11-12 13:03:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:03:26,827 INFO L481 AbstractCegarLoop]: Abstraction has 9363 states and 11194 transitions. [2020-11-12 13:03:26,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 6.18) internal successors, (309), 50 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:03:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 9363 states and 11194 transitions. [2020-11-12 13:03:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-11-12 13:03:26,848 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:03:26,848 INFO L494 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:03:27,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 13:03:27,063 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:03:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:03:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2058796585, now seen corresponding path program 16 times [2020-11-12 13:03:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:03:27,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911611610] [2020-11-12 13:03:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:03:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:03:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 10 proven. 1170 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-11-12 13:03:28,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911611610] [2020-11-12 13:03:28,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600697989] [2020-11-12 13:03:28,362 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 [2020-11-12 13:03:28,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 13:03:28,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:03:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 13:03:28,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:03:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 57 proven. 370 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2020-11-12 13:03:29,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:03:29,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23] total 54 [2020-11-12 13:03:29,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899913286] [2020-11-12 13:03:29,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-12 13:03:29,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:03:29,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-12 13:03:29,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2432, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 13:03:29,950 INFO L87 Difference]: Start difference. First operand 9363 states and 11194 transitions. Second operand has 54 states, 54 states have (on average 6.074074074074074) internal successors, (328), 54 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:03:43,699 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-11-12 13:06:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:06:29,920 INFO L93 Difference]: Finished difference Result 12661 states and 15146 transitions. [2020-11-12 13:06:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 905 states. [2020-11-12 13:06:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.074074074074074) internal successors, (328), 54 states have internal predecessors, (328), 0 states have call successors, (0), 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 297 [2020-11-12 13:06:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:06:29,937 INFO L225 Difference]: With dead ends: 12661 [2020-11-12 13:06:29,938 INFO L226 Difference]: Without dead ends: 12661 [2020-11-12 13:06:29,999 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 1365 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 928 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401272 ImplicationChecksByTransitivity, 179.3s TimeCoverageRelationStatistics Valid=128934, Invalid=735036, Unknown=0, NotChecked=0, Total=863970 [2020-11-12 13:06:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12661 states. [2020-11-12 13:06:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12661 to 10961. [2020-11-12 13:06:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10961 states, 10960 states have (on average 1.1958941605839417) internal successors, (13107), 10960 states have internal predecessors, (13107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:06:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10961 states to 10961 states and 13107 transitions. [2020-11-12 13:06:30,163 INFO L78 Accepts]: Start accepts. Automaton has 10961 states and 13107 transitions. Word has length 297 [2020-11-12 13:06:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:06:30,164 INFO L481 AbstractCegarLoop]: Abstraction has 10961 states and 13107 transitions. [2020-11-12 13:06:30,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 6.074074074074074) internal successors, (328), 54 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:06:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10961 states and 13107 transitions. [2020-11-12 13:06:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-11-12 13:06:30,189 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:06:30,189 INFO L494 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:06:30,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:06:30,405 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:06:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:06:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1373633469, now seen corresponding path program 17 times [2020-11-12 13:06:30,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:06:30,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169696835] [2020-11-12 13:06:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:06:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:06:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 11 proven. 1336 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-12 13:06:32,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169696835] [2020-11-12 13:06:32,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366570268] [2020-11-12 13:06:32,157 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 [2020-11-12 13:06:32,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-12 13:06:32,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:06:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 13:06:32,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:06:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2020-11-12 13:06:34,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:06:34,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 25] total 58 [2020-11-12 13:06:34,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018954270] [2020-11-12 13:06:34,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-12 13:06:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:06:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-12 13:06:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 13:06:34,561 INFO L87 Difference]: Start difference. First operand 10961 states and 13107 transitions. Second operand has 58 states, 58 states have (on average 5.982758620689655) internal successors, (347), 58 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:11:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:11:34,121 INFO L93 Difference]: Finished difference Result 14505 states and 17353 transitions. [2020-11-12 13:11:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1047 states. [2020-11-12 13:11:34,125 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.982758620689655) internal successors, (347), 58 states have internal predecessors, (347), 0 states have call successors, (0), 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 316 [2020-11-12 13:11:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:11:34,137 INFO L225 Difference]: With dead ends: 14505 [2020-11-12 13:11:34,138 INFO L226 Difference]: Without dead ends: 14505 [2020-11-12 13:11:34,191 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1072 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539655 ImplicationChecksByTransitivity, 298.5s TimeCoverageRelationStatistics Valid=170348, Invalid=982054, Unknown=0, NotChecked=0, Total=1152402 [2020-11-12 13:11:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14505 states. [2020-11-12 13:11:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14505 to 12681. [2020-11-12 13:11:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12681 states, 12680 states have (on average 1.1960567823343848) internal successors, (15166), 12680 states have internal predecessors, (15166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:11:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12681 states to 12681 states and 15166 transitions. [2020-11-12 13:11:34,355 INFO L78 Accepts]: Start accepts. Automaton has 12681 states and 15166 transitions. Word has length 316 [2020-11-12 13:11:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:11:34,356 INFO L481 AbstractCegarLoop]: Abstraction has 12681 states and 15166 transitions. [2020-11-12 13:11:34,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 5.982758620689655) internal successors, (347), 58 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:11:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 12681 states and 15166 transitions. [2020-11-12 13:11:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-11-12 13:11:34,372 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:11:34,373 INFO L494 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:11:34,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:11:34,587 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:11:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:11:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2138645571, now seen corresponding path program 18 times [2020-11-12 13:11:34,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:11:34,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567421853] [2020-11-12 13:11:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:11:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:11:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 12 proven. 1513 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-11-12 13:11:37,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567421853] [2020-11-12 13:11:37,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444598732] [2020-11-12 13:11:37,076 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 [2020-11-12 13:11:37,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-12 13:11:37,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:11:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-12 13:11:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:11:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 65 proven. 540 refuted. 0 times theorem prover too weak. 1448 trivial. 0 not checked. [2020-11-12 13:11:40,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:11:40,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 27] total 62 [2020-11-12 13:11:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572999312] [2020-11-12 13:11:40,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-12 13:11:40,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:11:40,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-12 13:11:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=3228, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 13:11:40,517 INFO L87 Difference]: Start difference. First operand 12681 states and 15166 transitions. Second operand has 62 states, 62 states have (on average 5.903225806451613) internal successors, (366), 62 states have internal predecessors, (366), 0 states have call successors, (0), 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... [2020-11-12 13:12:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 332 states. [2020-11-12 13:12:24,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:12:24,549 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-12 13:12:24,554 WARN L250 ceAbstractionStarter]: Timeout [2020-11-12 13:12:24,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 01:12:24 BasicIcfg [2020-11-12 13:12:24,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 13:12:24,555 INFO L168 Benchmark]: Toolchain (without parser) took 802748.34 ms. Allocated memory was 312.5 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 280.4 MB in the beginning and 211.3 MB in the end (delta: 69.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2020-11-12 13:12:24,556 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 312.5 MB. Free memory was 280.9 MB in the beginning and 280.9 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 13:12:24,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 999.38 ms. Allocated memory is still 312.5 MB. Free memory was 279.9 MB in the beginning and 219.2 MB in the end (delta: 60.7 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:24,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.32 ms. Allocated memory is still 312.5 MB. Free memory was 219.2 MB in the beginning and 217.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:24,557 INFO L168 Benchmark]: Boogie Preprocessor took 33.80 ms. Allocated memory is still 312.5 MB. Free memory was 217.1 MB in the beginning and 216.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 13:12:24,557 INFO L168 Benchmark]: RCFGBuilder took 664.10 ms. Allocated memory is still 312.5 MB. Free memory was 216.1 MB in the beginning and 188.8 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:24,558 INFO L168 Benchmark]: TraceAbstraction took 800980.35 ms. Allocated memory was 312.5 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 188.8 MB in the beginning and 211.3 MB in the end (delta: -22.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2020-11-12 13:12:24,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 312.5 MB. Free memory was 280.9 MB in the beginning and 280.9 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 999.38 ms. Allocated memory is still 312.5 MB. Free memory was 279.9 MB in the beginning and 219.2 MB in the end (delta: 60.7 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 58.32 ms. Allocated memory is still 312.5 MB. Free memory was 219.2 MB in the beginning and 217.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.80 ms. Allocated memory is still 312.5 MB. Free memory was 217.1 MB in the beginning and 216.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 664.10 ms. Allocated memory is still 312.5 MB. Free memory was 216.1 MB in the beginning and 188.8 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 800980.35 ms. Allocated memory was 312.5 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 188.8 MB in the beginning and 211.3 MB in the end (delta: -22.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (12681states) and FLOYD_HOARE automaton (currently 332 states, 62 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 379 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 800.8s, OverallIterations: 21, TraceHistogramMax: 17, AutomataDifference: 768.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 1533 SDtfs, 45337 SDslu, 21679 SDs, 0 SdLazy, 4060 SolverSat, 5005 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9769 GetRequests, 4271 SyntacticMatches, 0 SemanticMatches, 5497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685109 ImplicationChecksByTransitivity, 767.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12681occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 14077 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 7212 NumberOfCodeBlocks, 7124 NumberOfCodeBlocksAsserted, 125 NumberOfCheckSat, 7172 ConstructedInterpolants, 0 QuantifiedInterpolants, 4092886 SizeOfPredicates, 253 NumberOfNonLiveVariables, 7367 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 40 InterpolantComputations, 3 PerfectInterpolantSequences, 11015/24366 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