/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 14:36:07,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 14:36:07,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 14:36:07,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 14:36:07,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 14:36:07,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 14:36:07,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 14:36:07,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 14:36:07,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 14:36:07,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 14:36:07,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 14:36:07,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 14:36:07,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 14:36:07,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 14:36:07,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 14:36:07,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 14:36:07,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 14:36:07,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 14:36:07,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 14:36:07,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 14:36:07,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 14:36:07,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 14:36:07,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 14:36:07,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 14:36:07,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 14:36:07,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 14:36:07,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 14:36:07,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 14:36:07,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 14:36:07,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 14:36:07,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 14:36:07,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 14:36:07,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 14:36:07,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 14:36:07,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 14:36:07,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 14:36:07,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 14:36:07,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 14:36:07,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 14:36:07,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 14:36:07,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 14:36:07,126 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 14:36:07,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 14:36:07,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 14:36:07,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 14:36:07,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 14:36:07,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 14:36:07,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 14:36:07,167 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 14:36:07,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 14:36:07,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 14:36:07,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 14:36:07,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 14:36:07,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 14:36:07,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 14:36:07,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 14:36:07,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 14:36:07,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 14:36:07,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 14:36:07,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 14:36:07,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 14:36:07,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 14:36:07,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 14:36:07,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 14:36:07,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 14:36:07,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 14:36:07,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 14:36:07,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 14:36:07,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 14:36:07,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 14:36:07,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 14:36:07,173 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 14:36:07,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 14:36:07,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 14:36:07,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 14:36:07,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 14:36:07,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 14:36:07,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 14:36:07,492 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 14:36:07,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-03-10 14:36:07,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454376723/2bec305914a9443f99f795eec4652e09/FLAGac20e3ff3 [2021-03-10 14:36:07,968 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 14:36:07,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-03-10 14:36:07,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454376723/2bec305914a9443f99f795eec4652e09/FLAGac20e3ff3 [2021-03-10 14:36:08,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454376723/2bec305914a9443f99f795eec4652e09 [2021-03-10 14:36:08,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 14:36:08,309 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 14:36:08,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:08,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 14:36:08,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 14:36:08,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8af25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08, skipping insertion in model container [2021-03-10 14:36:08,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 14:36:08,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 14:36:08,657 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i[30927,30940] [2021-03-10 14:36:08,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:08,668 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 14:36:08,718 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i[30927,30940] [2021-03-10 14:36:08,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:08,784 INFO L208 MainTranslator]: Completed translation [2021-03-10 14:36:08,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08 WrapperNode [2021-03-10 14:36:08,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:08,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:08,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 14:36:08,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 14:36:08,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:08,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 14:36:08,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 14:36:08,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 14:36:08,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... [2021-03-10 14:36:08,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 14:36:08,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 14:36:08,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 14:36:08,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 14:36:08,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 14:36:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-03-10 14:36:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-03-10 14:36:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-03-10 14:36:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-03-10 14:36:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 14:36:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 14:36:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 14:36:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 14:36:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 14:36:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 14:36:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 14:36:08,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 14:36:08,949 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 14:36:09,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 14:36:09,306 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-03-10 14:36:09,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:09 BoogieIcfgContainer [2021-03-10 14:36:09,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 14:36:09,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 14:36:09,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 14:36:09,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 14:36:09,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 02:36:08" (1/3) ... [2021-03-10 14:36:09,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350df71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:09, skipping insertion in model container [2021-03-10 14:36:09,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:08" (2/3) ... [2021-03-10 14:36:09,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350df71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:09, skipping insertion in model container [2021-03-10 14:36:09,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:09" (3/3) ... [2021-03-10 14:36:09,314 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-03-10 14:36:09,318 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 14:36:09,318 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 14:36:09,324 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 14:36:09,324 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 14:36:09,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,350 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,350 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,351 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,351 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,351 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,351 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,351 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,352 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,352 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,355 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,356 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,356 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,356 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,357 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,357 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,363 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,363 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:09,366 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 14:36:09,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 14:36:09,410 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 14:36:09,410 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 14:36:09,410 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 14:36:09,410 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 14:36:09,410 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 14:36:09,410 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 14:36:09,411 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 14:36:09,411 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 14:36:09,422 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 62 transitions, 134 flow [2021-03-10 14:36:09,545 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 14:36:09,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:09,570 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:09,571 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash -80803440, now seen corresponding path program 1 times [2021-03-10 14:36:09,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:09,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488705294] [2021-03-10 14:36:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:09,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488705294] [2021-03-10 14:36:09,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:09,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 14:36:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001317602] [2021-03-10 14:36:09,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 14:36:09,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:09,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 14:36:09,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 14:36:09,925 INFO L87 Difference]: Start difference. First operand has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 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 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:10,137 INFO L93 Difference]: Finished difference Result 3730 states and 10826 transitions. [2021-03-10 14:36:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 14:36:10,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 14:36:10,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:10,164 INFO L225 Difference]: With dead ends: 3730 [2021-03-10 14:36:10,164 INFO L226 Difference]: Without dead ends: 1168 [2021-03-10 14:36:10,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 14:36:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-03-10 14:36:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 903. [2021-03-10 14:36:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.7084257206208426) internal successors, (2443), 902 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2443 transitions. [2021-03-10 14:36:10,264 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2443 transitions. Word has length 26 [2021-03-10 14:36:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:10,265 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 2443 transitions. [2021-03-10 14:36:10,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2443 transitions. [2021-03-10 14:36:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:10,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:10,268 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:10,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 14:36:10,268 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash 311820000, now seen corresponding path program 1 times [2021-03-10 14:36:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:10,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689567287] [2021-03-10 14:36:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689567287] [2021-03-10 14:36:10,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:10,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:10,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256014945] [2021-03-10 14:36:10,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:10,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:10,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:10,391 INFO L87 Difference]: Start difference. First operand 903 states and 2443 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:10,508 INFO L93 Difference]: Finished difference Result 1680 states and 4453 transitions. [2021-03-10 14:36:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:10,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:10,517 INFO L225 Difference]: With dead ends: 1680 [2021-03-10 14:36:10,517 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:10,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 998. [2021-03-10 14:36:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.7191574724172516) internal successors, (2711), 997 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2711 transitions. [2021-03-10 14:36:10,555 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2711 transitions. Word has length 31 [2021-03-10 14:36:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:10,555 INFO L480 AbstractCegarLoop]: Abstraction has 998 states and 2711 transitions. [2021-03-10 14:36:10,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2711 transitions. [2021-03-10 14:36:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:10,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:10,559 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:10,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 14:36:10,559 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:10,560 INFO L82 PathProgramCache]: Analyzing trace with hash 795910062, now seen corresponding path program 1 times [2021-03-10 14:36:10,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:10,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172694439] [2021-03-10 14:36:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:10,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172694439] [2021-03-10 14:36:10,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:10,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:10,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753795860] [2021-03-10 14:36:10,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:10,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:10,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:10,689 INFO L87 Difference]: Start difference. First operand 998 states and 2711 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:10,790 INFO L93 Difference]: Finished difference Result 1726 states and 4512 transitions. [2021-03-10 14:36:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:10,797 INFO L225 Difference]: With dead ends: 1726 [2021-03-10 14:36:10,797 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:10,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1101. [2021-03-10 14:36:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.6672727272727275) internal successors, (2934), 1100 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2934 transitions. [2021-03-10 14:36:10,829 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2934 transitions. Word has length 31 [2021-03-10 14:36:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:10,829 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 2934 transitions. [2021-03-10 14:36:10,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2934 transitions. [2021-03-10 14:36:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:10,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:10,831 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:10,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 14:36:10,831 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash 596317858, now seen corresponding path program 2 times [2021-03-10 14:36:10,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:10,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212430690] [2021-03-10 14:36:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:10,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212430690] [2021-03-10 14:36:10,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:10,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:10,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476191873] [2021-03-10 14:36:10,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:10,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:10,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:10,952 INFO L87 Difference]: Start difference. First operand 1101 states and 2934 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:11,077 INFO L93 Difference]: Finished difference Result 1918 states and 5024 transitions. [2021-03-10 14:36:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 14:36:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:11,085 INFO L225 Difference]: With dead ends: 1918 [2021-03-10 14:36:11,085 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 14:36:11,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 14:36:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1179. [2021-03-10 14:36:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.6816638370118846) internal successors, (3159), 1178 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3159 transitions. [2021-03-10 14:36:11,122 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3159 transitions. Word has length 31 [2021-03-10 14:36:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:11,123 INFO L480 AbstractCegarLoop]: Abstraction has 1179 states and 3159 transitions. [2021-03-10 14:36:11,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3159 transitions. [2021-03-10 14:36:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:11,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:11,126 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:11,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 14:36:11,127 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash -147815549, now seen corresponding path program 1 times [2021-03-10 14:36:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:11,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344452160] [2021-03-10 14:36:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:11,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344452160] [2021-03-10 14:36:11,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720613218] [2021-03-10 14:36:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:11,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:11,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:11,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 14:36:11,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469119385] [2021-03-10 14:36:11,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:11,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:11,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:11,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:11,671 INFO L87 Difference]: Start difference. First operand 1179 states and 3159 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:11,924 INFO L93 Difference]: Finished difference Result 2364 states and 6203 transitions. [2021-03-10 14:36:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 14:36:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:11,935 INFO L225 Difference]: With dead ends: 2364 [2021-03-10 14:36:11,935 INFO L226 Difference]: Without dead ends: 2000 [2021-03-10 14:36:11,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 14:36:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-03-10 14:36:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1369. [2021-03-10 14:36:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 2.7010233918128654) internal successors, (3695), 1368 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 3695 transitions. [2021-03-10 14:36:11,972 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 3695 transitions. Word has length 36 [2021-03-10 14:36:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:11,973 INFO L480 AbstractCegarLoop]: Abstraction has 1369 states and 3695 transitions. [2021-03-10 14:36:11,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 3695 transitions. [2021-03-10 14:36:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:11,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:11,974 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:12,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:12,196 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1671330910, now seen corresponding path program 1 times [2021-03-10 14:36:12,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:12,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568628214] [2021-03-10 14:36:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:12,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568628214] [2021-03-10 14:36:12,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:12,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104737136] [2021-03-10 14:36:12,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:12,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:12,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:12,302 INFO L87 Difference]: Start difference. First operand 1369 states and 3695 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:12,384 INFO L93 Difference]: Finished difference Result 2041 states and 5346 transitions. [2021-03-10 14:36:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-03-10 14:36:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:12,392 INFO L225 Difference]: With dead ends: 2041 [2021-03-10 14:36:12,393 INFO L226 Difference]: Without dead ends: 1889 [2021-03-10 14:36:12,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2021-03-10 14:36:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1433. [2021-03-10 14:36:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 2.685055865921788) internal successors, (3845), 1432 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3845 transitions. [2021-03-10 14:36:12,430 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3845 transitions. Word has length 36 [2021-03-10 14:36:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:12,430 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 3845 transitions. [2021-03-10 14:36:12,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3845 transitions. [2021-03-10 14:36:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:12,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:12,432 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:12,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 14:36:12,432 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:12,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1471738706, now seen corresponding path program 2 times [2021-03-10 14:36:12,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:12,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953900139] [2021-03-10 14:36:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953900139] [2021-03-10 14:36:12,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:12,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:12,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387732103] [2021-03-10 14:36:12,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:12,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:12,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:12,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:12,557 INFO L87 Difference]: Start difference. First operand 1433 states and 3845 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:12,694 INFO L93 Difference]: Finished difference Result 2336 states and 6145 transitions. [2021-03-10 14:36:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:12,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-03-10 14:36:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:12,704 INFO L225 Difference]: With dead ends: 2336 [2021-03-10 14:36:12,705 INFO L226 Difference]: Without dead ends: 2078 [2021-03-10 14:36:12,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-03-10 14:36:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1412. [2021-03-10 14:36:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.6959603118355777) internal successors, (3804), 1411 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 3804 transitions. [2021-03-10 14:36:12,744 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 3804 transitions. Word has length 36 [2021-03-10 14:36:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:12,745 INFO L480 AbstractCegarLoop]: Abstraction has 1412 states and 3804 transitions. [2021-03-10 14:36:12,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 3804 transitions. [2021-03-10 14:36:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:12,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:12,748 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 14:36:12,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 14:36:12,749 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash 990498636, now seen corresponding path program 3 times [2021-03-10 14:36:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:12,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990538799] [2021-03-10 14:36:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:12,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990538799] [2021-03-10 14:36:12,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:12,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:12,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515123234] [2021-03-10 14:36:12,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:12,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:12,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:12,847 INFO L87 Difference]: Start difference. First operand 1412 states and 3804 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:13,013 INFO L93 Difference]: Finished difference Result 2665 states and 7026 transitions. [2021-03-10 14:36:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-03-10 14:36:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:13,023 INFO L225 Difference]: With dead ends: 2665 [2021-03-10 14:36:13,023 INFO L226 Difference]: Without dead ends: 2237 [2021-03-10 14:36:13,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-03-10 14:36:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1582. [2021-03-10 14:36:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.6824794433902595) internal successors, (4241), 1581 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 4241 transitions. [2021-03-10 14:36:13,065 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 4241 transitions. Word has length 36 [2021-03-10 14:36:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:13,065 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 4241 transitions. [2021-03-10 14:36:13,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 4241 transitions. [2021-03-10 14:36:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:13,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:13,068 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:13,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 14:36:13,068 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1524865637, now seen corresponding path program 1 times [2021-03-10 14:36:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252933107] [2021-03-10 14:36:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:13,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252933107] [2021-03-10 14:36:13,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026475344] [2021-03-10 14:36:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:13,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:13,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:13,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:13,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732823817] [2021-03-10 14:36:13,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:13,488 INFO L87 Difference]: Start difference. First operand 1582 states and 4241 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:13,607 INFO L93 Difference]: Finished difference Result 2318 states and 6060 transitions. [2021-03-10 14:36:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 14:36:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 41 [2021-03-10 14:36:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:13,615 INFO L225 Difference]: With dead ends: 2318 [2021-03-10 14:36:13,615 INFO L226 Difference]: Without dead ends: 2166 [2021-03-10 14:36:13,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-03-10 14:36:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1646. [2021-03-10 14:36:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 2.6693009118541036) internal successors, (4391), 1645 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 4391 transitions. [2021-03-10 14:36:13,667 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 4391 transitions. Word has length 41 [2021-03-10 14:36:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:13,668 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 4391 transitions. [2021-03-10 14:36:13,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 4391 transitions. [2021-03-10 14:36:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:13,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:13,671 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:13,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 14:36:13,887 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1724457841, now seen corresponding path program 2 times [2021-03-10 14:36:13,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916791149] [2021-03-10 14:36:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:13,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916791149] [2021-03-10 14:36:13,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741865431] [2021-03-10 14:36:13,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:14,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:14,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:14,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:14,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:14,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 14:36:14,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447744821] [2021-03-10 14:36:14,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:14,157 INFO L87 Difference]: Start difference. First operand 1646 states and 4391 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,426 INFO L93 Difference]: Finished difference Result 2940 states and 7783 transitions. [2021-03-10 14:36:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 14:36:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,447 INFO L225 Difference]: With dead ends: 2940 [2021-03-10 14:36:14,447 INFO L226 Difference]: Without dead ends: 2576 [2021-03-10 14:36:14,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-03-10 14:36:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-03-10 14:36:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1631. [2021-03-10 14:36:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 2.696319018404908) internal successors, (4395), 1630 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 4395 transitions. [2021-03-10 14:36:14,490 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 4395 transitions. Word has length 41 [2021-03-10 14:36:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,490 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 4395 transitions. [2021-03-10 14:36:14,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 4395 transitions. [2021-03-10 14:36:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:14,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,495 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:14,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 14:36:14,711 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash 784139351, now seen corresponding path program 1 times [2021-03-10 14:36:14,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471860037] [2021-03-10 14:36:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471860037] [2021-03-10 14:36:14,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796697057] [2021-03-10 14:36:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:15,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:15,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:15,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062825402] [2021-03-10 14:36:15,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:15,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:15,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:15,073 INFO L87 Difference]: Start difference. First operand 1631 states and 4395 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:15,258 INFO L93 Difference]: Finished difference Result 2730 states and 7013 transitions. [2021-03-10 14:36:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 14:36:15,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 41 [2021-03-10 14:36:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:15,264 INFO L225 Difference]: With dead ends: 2730 [2021-03-10 14:36:15,264 INFO L226 Difference]: Without dead ends: 2426 [2021-03-10 14:36:15,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-03-10 14:36:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-03-10 14:36:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1724. [2021-03-10 14:36:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.6656993615786417) internal successors, (4593), 1723 states have internal predecessors, (4593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4593 transitions. [2021-03-10 14:36:15,303 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4593 transitions. Word has length 41 [2021-03-10 14:36:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:15,303 INFO L480 AbstractCegarLoop]: Abstraction has 1724 states and 4593 transitions. [2021-03-10 14:36:15,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4593 transitions. [2021-03-10 14:36:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:15,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:15,305 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:15,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:15,519 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1132661283, now seen corresponding path program 2 times [2021-03-10 14:36:15,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351396347] [2021-03-10 14:36:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:15,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351396347] [2021-03-10 14:36:15,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042122193] [2021-03-10 14:36:15,601 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:15,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:15,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:15,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:15,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:15,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235820624] [2021-03-10 14:36:15,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:15,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:15,824 INFO L87 Difference]: Start difference. First operand 1724 states and 4593 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:16,067 INFO L93 Difference]: Finished difference Result 3114 states and 7981 transitions. [2021-03-10 14:36:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 14:36:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 41 [2021-03-10 14:36:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:16,072 INFO L225 Difference]: With dead ends: 3114 [2021-03-10 14:36:16,072 INFO L226 Difference]: Without dead ends: 2810 [2021-03-10 14:36:16,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-03-10 14:36:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-03-10 14:36:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1862. [2021-03-10 14:36:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 2.710908113917249) internal successors, (5045), 1861 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5045 transitions. [2021-03-10 14:36:16,114 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5045 transitions. Word has length 41 [2021-03-10 14:36:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:16,114 INFO L480 AbstractCegarLoop]: Abstraction has 1862 states and 5045 transitions. [2021-03-10 14:36:16,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5045 transitions. [2021-03-10 14:36:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:16,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:16,117 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:16,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 14:36:16,340 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash -767457719, now seen corresponding path program 3 times [2021-03-10 14:36:16,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:16,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750149004] [2021-03-10 14:36:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750149004] [2021-03-10 14:36:16,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944498820] [2021-03-10 14:36:16,429 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:16,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:16,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:16,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:16,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404001496] [2021-03-10 14:36:16,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:16,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:16,641 INFO L87 Difference]: Start difference. First operand 1862 states and 5045 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,113 INFO L93 Difference]: Finished difference Result 3960 states and 10472 transitions. [2021-03-10 14:36:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 14:36:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 41 [2021-03-10 14:36:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,122 INFO L225 Difference]: With dead ends: 3960 [2021-03-10 14:36:17,123 INFO L226 Difference]: Without dead ends: 3320 [2021-03-10 14:36:17,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 14:36:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-03-10 14:36:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2002. [2021-03-10 14:36:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 2.705647176411794) internal successors, (5414), 2001 states have internal predecessors, (5414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5414 transitions. [2021-03-10 14:36:17,167 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5414 transitions. Word has length 41 [2021-03-10 14:36:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:17,167 INFO L480 AbstractCegarLoop]: Abstraction has 2002 states and 5414 transitions. [2021-03-10 14:36:17,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5414 transitions. [2021-03-10 14:36:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:17,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:17,170 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-03-10 14:36:17,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:17,392 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:17,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:17,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1586610595, now seen corresponding path program 2 times [2021-03-10 14:36:17,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:17,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60197659] [2021-03-10 14:36:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60197659] [2021-03-10 14:36:17,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616761617] [2021-03-10 14:36:17,499 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:17,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:17,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:17,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:17,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:17,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260075201] [2021-03-10 14:36:17,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:17,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:17,765 INFO L87 Difference]: Start difference. First operand 2002 states and 5414 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,985 INFO L93 Difference]: Finished difference Result 3462 states and 9194 transitions. [2021-03-10 14:36:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 14:36:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 46 [2021-03-10 14:36:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,992 INFO L225 Difference]: With dead ends: 3462 [2021-03-10 14:36:17,992 INFO L226 Difference]: Without dead ends: 3098 [2021-03-10 14:36:17,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-03-10 14:36:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-03-10 14:36:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2192. [2021-03-10 14:36:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.7156549520766773) internal successors, (5950), 2191 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5950 transitions. [2021-03-10 14:36:18,032 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5950 transitions. Word has length 46 [2021-03-10 14:36:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:18,032 INFO L480 AbstractCegarLoop]: Abstraction has 2192 states and 5950 transitions. [2021-03-10 14:36:18,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5950 transitions. [2021-03-10 14:36:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:18,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:18,036 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-03-10 14:36:18,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 14:36:18,259 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash -889210242, now seen corresponding path program 3 times [2021-03-10 14:36:18,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:18,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805007055] [2021-03-10 14:36:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:18,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805007055] [2021-03-10 14:36:18,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165119291] [2021-03-10 14:36:18,355 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:18,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 14:36:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 14:36:18,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:18,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 14:36:18,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460527971] [2021-03-10 14:36:18,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:18,525 INFO L87 Difference]: Start difference. First operand 2192 states and 5950 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:18,650 INFO L93 Difference]: Finished difference Result 3067 states and 8107 transitions. [2021-03-10 14:36:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:18,657 INFO L225 Difference]: With dead ends: 3067 [2021-03-10 14:36:18,657 INFO L226 Difference]: Without dead ends: 2915 [2021-03-10 14:36:18,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-03-10 14:36:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2256. [2021-03-10 14:36:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.70509977827051) internal successors, (6100), 2255 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6100 transitions. [2021-03-10 14:36:18,699 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6100 transitions. Word has length 46 [2021-03-10 14:36:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:18,699 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 6100 transitions. [2021-03-10 14:36:18,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6100 transitions. [2021-03-10 14:36:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:18,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:18,702 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-03-10 14:36:18,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 14:36:18,924 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:18,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1088802446, now seen corresponding path program 4 times [2021-03-10 14:36:18,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:18,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133062557] [2021-03-10 14:36:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133062557] [2021-03-10 14:36:19,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611295410] [2021-03-10 14:36:19,010 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:19,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:19,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:19,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:19,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:19,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134320304] [2021-03-10 14:36:19,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:19,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:19,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:19,334 INFO L87 Difference]: Start difference. First operand 2256 states and 6100 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:19,732 INFO L93 Difference]: Finished difference Result 3930 states and 10460 transitions. [2021-03-10 14:36:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 14:36:19,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:19,740 INFO L225 Difference]: With dead ends: 3930 [2021-03-10 14:36:19,740 INFO L226 Difference]: Without dead ends: 3566 [2021-03-10 14:36:19,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-03-10 14:36:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2021-03-10 14:36:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 2217. [2021-03-10 14:36:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 2.7098375451263537) internal successors, (6005), 2216 states have internal predecessors, (6005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6005 transitions. [2021-03-10 14:36:19,787 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6005 transitions. Word has length 46 [2021-03-10 14:36:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:19,787 INFO L480 AbstractCegarLoop]: Abstraction has 2217 states and 6005 transitions. [2021-03-10 14:36:19,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6005 transitions. [2021-03-10 14:36:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:19,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:19,791 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:20,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 14:36:20,007 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:20,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1419794746, now seen corresponding path program 1 times [2021-03-10 14:36:20,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:20,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183204911] [2021-03-10 14:36:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183204911] [2021-03-10 14:36:20,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622267240] [2021-03-10 14:36:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:20,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:20,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918123917] [2021-03-10 14:36:20,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:20,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:20,329 INFO L87 Difference]: Start difference. First operand 2217 states and 6005 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:20,547 INFO L93 Difference]: Finished difference Result 3279 states and 8523 transitions. [2021-03-10 14:36:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 14:36:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:20,555 INFO L225 Difference]: With dead ends: 3279 [2021-03-10 14:36:20,555 INFO L226 Difference]: Without dead ends: 3127 [2021-03-10 14:36:20,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-03-10 14:36:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2021-03-10 14:36:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 2256. [2021-03-10 14:36:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.70509977827051) internal successors, (6100), 2255 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6100 transitions. [2021-03-10 14:36:20,598 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6100 transitions. Word has length 46 [2021-03-10 14:36:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:20,598 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 6100 transitions. [2021-03-10 14:36:20,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6100 transitions. [2021-03-10 14:36:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:20,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:20,601 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:20,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:20,823 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:20,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1768316678, now seen corresponding path program 2 times [2021-03-10 14:36:20,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:20,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476124282] [2021-03-10 14:36:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476124282] [2021-03-10 14:36:20,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259406045] [2021-03-10 14:36:20,909 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:20,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:20,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:21,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:21,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:21,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165861691] [2021-03-10 14:36:21,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:21,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:21,176 INFO L87 Difference]: Start difference. First operand 2256 states and 6100 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:21,417 INFO L93 Difference]: Finished difference Result 3247 states and 8567 transitions. [2021-03-10 14:36:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 14:36:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:21,422 INFO L225 Difference]: With dead ends: 3247 [2021-03-10 14:36:21,422 INFO L226 Difference]: Without dead ends: 3095 [2021-03-10 14:36:21,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-03-10 14:36:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-03-10 14:36:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2336. [2021-03-10 14:36:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.71948608137045) internal successors, (6350), 2335 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 6350 transitions. [2021-03-10 14:36:21,466 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 6350 transitions. Word has length 46 [2021-03-10 14:36:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:21,466 INFO L480 AbstractCegarLoop]: Abstraction has 2336 states and 6350 transitions. [2021-03-10 14:36:21,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 6350 transitions. [2021-03-10 14:36:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:21,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:21,469 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-10 14:36:21,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 14:36:21,690 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash -131802324, now seen corresponding path program 3 times [2021-03-10 14:36:21,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:21,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91440861] [2021-03-10 14:36:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:21,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91440861] [2021-03-10 14:36:21,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284015411] [2021-03-10 14:36:21,768 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:21,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:22,326 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 23 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown