/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 03:01:43,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 03:01:43,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 03:01:43,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 03:01:43,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 03:01:43,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 03:01:43,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 03:01:43,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 03:01:43,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 03:01:43,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 03:01:43,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 03:01:43,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 03:01:43,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 03:01:43,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 03:01:43,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 03:01:43,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 03:01:43,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 03:01:43,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 03:01:43,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 03:01:43,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 03:01:43,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 03:01:43,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 03:01:43,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 03:01:43,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 03:01:43,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-12 03:01:43,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-12 03:01:43,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-12 03:01:43,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-12 03:01:43,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-12 03:01:43,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-12 03:01:43,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 03:01:43,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 03:01:43,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 03:01:43,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 03:01:43,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 03:01:43,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 03:01:43,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 03:01:43,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 03:01:43,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 03:01:43,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 03:01:43,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 03:01:43,546 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-Delay.epf [2020-11-12 03:01:43,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 03:01:43,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 03:01:43,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 03:01:43,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 03:01:43,577 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 03:01:43,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 03:01:43,577 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 03:01:43,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 03:01:43,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 03:01:43,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 03:01:43,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 03:01:43,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 03:01:43,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 03:01:43,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 03:01:43,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 03:01:43,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 03:01:43,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 03:01:43,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 03:01:43,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 03:01:43,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 03:01:43,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 03:01:43,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 03:01:43,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 03:01:43,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 03:01:43,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 03:01:43,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 03:01:43,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 03:01:43,582 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 03:01:43,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 03:01:43,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 03:01:43,583 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=DELAY_SET WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 03:01:43,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 03:01:44,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 03:01:44,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 03:01:44,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 03:01:44,026 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 03:01:44,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-11-12 03:01:44,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d2f9540d/f65187c83be54c9996463c6e195650a9/FLAG6b2877cbf [2020-11-12 03:01:44,954 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 03:01:44,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-11-12 03:01:44,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d2f9540d/f65187c83be54c9996463c6e195650a9/FLAG6b2877cbf [2020-11-12 03:01:45,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d2f9540d/f65187c83be54c9996463c6e195650a9 [2020-11-12 03:01:45,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 03:01:45,200 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 03:01:45,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 03:01:45,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 03:01:45,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 03:01:45,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41cf766d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45, skipping insertion in model container [2020-11-12 03:01:45,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 03:01:45,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 03:01:45,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 03:01:45,725 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 03:01:45,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 03:01:45,895 INFO L208 MainTranslator]: Completed translation [2020-11-12 03:01:45,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45 WrapperNode [2020-11-12 03:01:45,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 03:01:45,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 03:01:45,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 03:01:45,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 03:01:45,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 03:01:45,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 03:01:45,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 03:01:45,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 03:01:45,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 03:01:45,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 03:01:45,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 03:01:45,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 03:01:45,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 03:01:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-12 03:01:46,096 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-12 03:01:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-12 03:01:46,097 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-12 03:01:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 03:01:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 03:01:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 03:01:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 03:01:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 03:01:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 03:01:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 03:01:46,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 03:01:46,103 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 03:01:46,519 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 03:01:46,519 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-12 03:01:46,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:01:46 BoogieIcfgContainer [2020-11-12 03:01:46,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 03:01:46,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 03:01:46,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 03:01:46,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 03:01:46,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 03:01:45" (1/3) ... [2020-11-12 03:01:46,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120c7c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:01:46, skipping insertion in model container [2020-11-12 03:01:46,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (2/3) ... [2020-11-12 03:01:46,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120c7c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:01:46, skipping insertion in model container [2020-11-12 03:01:46,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:01:46" (3/3) ... [2020-11-12 03:01:46,530 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-11-12 03:01:46,548 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 03:01:46,548 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 03:01:46,552 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 03:01:46,554 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 03:01:46,584 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,584 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,589 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,592 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,592 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,592 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,592 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,592 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,593 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,593 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,593 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,593 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,595 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,595 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,595 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,595 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,602 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,615 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 03:01:46,628 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-12 03:01:46,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 03:01:46,654 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 03:01:46,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 03:01:46,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 03:01:46,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 03:01:46,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 03:01:46,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 03:01:46,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 03:01:46,667 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-11-12 03:01:46,836 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,043 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 203ms [2020-11-12 03:01:47,052 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,058 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 2229 states, 1965 states have (on average 1.3572519083969465) internal successors, (2667), 2228 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 1965 states have (on average 1.3572519083969465) internal successors, (2667), 2228 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-12 03:01:47,074 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:47,075 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:47,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash 792846013, now seen corresponding path program 1 times [2020-11-12 03:01:47,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:47,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162558893] [2020-11-12 03:01:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:47,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162558893] [2020-11-12 03:01:47,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:47,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 03:01:47,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314744902] [2020-11-12 03:01:47,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 03:01:47,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 03:01:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 03:01:47,570 INFO L87 Difference]: Start difference. First operand has 2229 states, 1965 states have (on average 1.3572519083969465) internal successors, (2667), 2228 states have internal predecessors, (2667), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:47,756 INFO L93 Difference]: Finished difference Result 4034 states and 4505 transitions. [2020-11-12 03:01:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 03:01:47,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2020-11-12 03:01:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:47,782 INFO L225 Difference]: With dead ends: 4034 [2020-11-12 03:01:47,782 INFO L226 Difference]: Without dead ends: 1143 [2020-11-12 03:01:47,784 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-12 03:01:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-11-12 03:01:47,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 860. [2020-11-12 03:01:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 748 states have (on average 1.3489304812834224) internal successors, (1009), 859 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1009 transitions. [2020-11-12 03:01:47,899 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1009 transitions. Word has length 28 [2020-11-12 03:01:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:47,899 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1009 transitions. [2020-11-12 03:01:47,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1009 transitions. [2020-11-12 03:01:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 03:01:47,903 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:47,903 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:47,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 03:01:47,904 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1893217839, now seen corresponding path program 1 times [2020-11-12 03:01:47,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:47,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947492072] [2020-11-12 03:01:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:48,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947492072] [2020-11-12 03:01:48,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:48,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 03:01:48,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54651537] [2020-11-12 03:01:48,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 03:01:48,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 03:01:48,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-12 03:01:48,139 INFO L87 Difference]: Start difference. First operand 860 states and 1009 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:48,259 INFO L93 Difference]: Finished difference Result 1563 states and 1894 transitions. [2020-11-12 03:01:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 03:01:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2020-11-12 03:01:48,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:48,266 INFO L225 Difference]: With dead ends: 1563 [2020-11-12 03:01:48,266 INFO L226 Difference]: Without dead ends: 1323 [2020-11-12 03:01:48,267 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-12 03:01:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-11-12 03:01:48,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 877. [2020-11-12 03:01:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 765 states have (on average 1.3529411764705883) internal successors, (1035), 876 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1035 transitions. [2020-11-12 03:01:48,299 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1035 transitions. Word has length 33 [2020-11-12 03:01:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:48,299 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1035 transitions. [2020-11-12 03:01:48,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1035 transitions. [2020-11-12 03:01:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 03:01:48,302 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:48,302 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:48,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 03:01:48,302 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash -11030355, now seen corresponding path program 1 times [2020-11-12 03:01:48,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:48,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945811404] [2020-11-12 03:01:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:48,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945811404] [2020-11-12 03:01:48,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:48,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 03:01:48,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541653421] [2020-11-12 03:01:48,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 03:01:48,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 03:01:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-12 03:01:48,476 INFO L87 Difference]: Start difference. First operand 877 states and 1035 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:48,586 INFO L93 Difference]: Finished difference Result 1607 states and 2001 transitions. [2020-11-12 03:01:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 03:01:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2020-11-12 03:01:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:48,594 INFO L225 Difference]: With dead ends: 1607 [2020-11-12 03:01:48,594 INFO L226 Difference]: Without dead ends: 1303 [2020-11-12 03:01:48,595 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-12 03:01:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-11-12 03:01:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 964. [2020-11-12 03:01:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 852 states have (on average 1.3368544600938967) internal successors, (1139), 963 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1139 transitions. [2020-11-12 03:01:48,627 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1139 transitions. Word has length 33 [2020-11-12 03:01:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:48,628 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1139 transitions. [2020-11-12 03:01:48,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1139 transitions. [2020-11-12 03:01:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:48,630 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:48,630 INFO L494 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] [2020-11-12 03:01:48,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 03:01:48,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1900462950, now seen corresponding path program 1 times [2020-11-12 03:01:48,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:48,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904662599] [2020-11-12 03:01:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:48,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904662599] [2020-11-12 03:01:48,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827961053] [2020-11-12 03:01:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 03:01:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:48,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:49,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:49,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:49,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-12 03:01:49,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819640632] [2020-11-12 03:01:49,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 03:01:49,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 03:01:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-12 03:01:49,042 INFO L87 Difference]: Start difference. First operand 964 states and 1139 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:49,281 INFO L93 Difference]: Finished difference Result 1971 states and 2405 transitions. [2020-11-12 03:01:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 03:01:49,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 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 38 [2020-11-12 03:01:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:49,290 INFO L225 Difference]: With dead ends: 1971 [2020-11-12 03:01:49,290 INFO L226 Difference]: Without dead ends: 1643 [2020-11-12 03:01:49,291 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:01:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2020-11-12 03:01:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 974. [2020-11-12 03:01:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 862 states have (on average 1.3468677494199537) internal successors, (1161), 973 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1161 transitions. [2020-11-12 03:01:49,324 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1161 transitions. Word has length 38 [2020-11-12 03:01:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:49,325 INFO L481 AbstractCegarLoop]: Abstraction has 974 states and 1161 transitions. [2020-11-12 03:01:49,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,325 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1161 transitions. [2020-11-12 03:01:49,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:49,327 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:49,327 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:49,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:49,543 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:49,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2086129541, now seen corresponding path program 1 times [2020-11-12 03:01:49,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:49,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427304611] [2020-11-12 03:01:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:49,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427304611] [2020-11-12 03:01:49,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:49,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 03:01:49,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002284126] [2020-11-12 03:01:49,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 03:01:49,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:49,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 03:01:49,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-12 03:01:49,756 INFO L87 Difference]: Start difference. First operand 974 states and 1161 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:49,856 INFO L93 Difference]: Finished difference Result 1584 states and 1939 transitions. [2020-11-12 03:01:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 03:01:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2020-11-12 03:01:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:49,864 INFO L225 Difference]: With dead ends: 1584 [2020-11-12 03:01:49,865 INFO L226 Difference]: Without dead ends: 1432 [2020-11-12 03:01:49,865 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-12 03:01:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2020-11-12 03:01:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1011. [2020-11-12 03:01:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 899 states have (on average 1.3448275862068966) internal successors, (1209), 1010 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1209 transitions. [2020-11-12 03:01:49,898 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1209 transitions. Word has length 38 [2020-11-12 03:01:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:49,898 INFO L481 AbstractCegarLoop]: Abstraction has 1011 states and 1209 transitions. [2020-11-12 03:01:49,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1209 transitions. [2020-11-12 03:01:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:49,900 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:49,900 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:49,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 03:01:49,901 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1264515541, now seen corresponding path program 2 times [2020-11-12 03:01:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:49,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214855698] [2020-11-12 03:01:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214855698] [2020-11-12 03:01:50,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 03:01:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657076280] [2020-11-12 03:01:50,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 03:01:50,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:50,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 03:01:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-12 03:01:50,030 INFO L87 Difference]: Start difference. First operand 1011 states and 1209 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:50,231 INFO L93 Difference]: Finished difference Result 1856 states and 2322 transitions. [2020-11-12 03:01:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 03:01:50,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2020-11-12 03:01:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:50,240 INFO L225 Difference]: With dead ends: 1856 [2020-11-12 03:01:50,240 INFO L226 Difference]: Without dead ends: 1616 [2020-11-12 03:01:50,241 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-12 03:01:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-11-12 03:01:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1016. [2020-11-12 03:01:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 904 states have (on average 1.345132743362832) internal successors, (1216), 1015 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1216 transitions. [2020-11-12 03:01:50,272 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1216 transitions. Word has length 38 [2020-11-12 03:01:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:50,272 INFO L481 AbstractCegarLoop]: Abstraction has 1016 states and 1216 transitions. [2020-11-12 03:01:50,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1216 transitions. [2020-11-12 03:01:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:50,274 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:50,275 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:50,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-12 03:01:50,275 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:50,276 INFO L82 PathProgramCache]: Analyzing trace with hash -612433095, now seen corresponding path program 3 times [2020-11-12 03:01:50,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:50,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452604572] [2020-11-12 03:01:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:50,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452604572] [2020-11-12 03:01:50,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:50,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 03:01:50,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302229032] [2020-11-12 03:01:50,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 03:01:50,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 03:01:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-12 03:01:50,382 INFO L87 Difference]: Start difference. First operand 1016 states and 1216 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:50,602 INFO L93 Difference]: Finished difference Result 2006 states and 2548 transitions. [2020-11-12 03:01:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 03:01:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2020-11-12 03:01:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:50,611 INFO L225 Difference]: With dead ends: 2006 [2020-11-12 03:01:50,611 INFO L226 Difference]: Without dead ends: 1614 [2020-11-12 03:01:50,612 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:01:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2020-11-12 03:01:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1094. [2020-11-12 03:01:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 982 states have (on average 1.3289205702647657) internal successors, (1305), 1093 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1305 transitions. [2020-11-12 03:01:50,647 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1305 transitions. Word has length 38 [2020-11-12 03:01:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:50,647 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1305 transitions. [2020-11-12 03:01:50,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1305 transitions. [2020-11-12 03:01:50,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:50,650 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:50,650 INFO L494 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, 1, 1] [2020-11-12 03:01:50,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-12 03:01:50,650 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1859891804, now seen corresponding path program 1 times [2020-11-12 03:01:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:50,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070352505] [2020-11-12 03:01:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:50,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070352505] [2020-11-12 03:01:50,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70282533] [2020-11-12 03:01:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:01:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:50,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:50,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:50,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:01:50,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907880088] [2020-11-12 03:01:50,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:01:51,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:51,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:01:51,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:01:51,001 INFO L87 Difference]: Start difference. First operand 1094 states and 1305 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:51,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:51,201 INFO L93 Difference]: Finished difference Result 1746 states and 2133 transitions. [2020-11-12 03:01:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-12 03:01:51,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2020-11-12 03:01:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:51,210 INFO L225 Difference]: With dead ends: 1746 [2020-11-12 03:01:51,211 INFO L226 Difference]: Without dead ends: 1594 [2020-11-12 03:01:51,217 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:01:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-11-12 03:01:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1119. [2020-11-12 03:01:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1007 states have (on average 1.3316782522343595) internal successors, (1341), 1118 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1341 transitions. [2020-11-12 03:01:51,253 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1341 transitions. Word has length 43 [2020-11-12 03:01:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:51,254 INFO L481 AbstractCegarLoop]: Abstraction has 1119 states and 1341 transitions. [2020-11-12 03:01:51,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1341 transitions. [2020-11-12 03:01:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:51,256 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:51,256 INFO L494 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, 1, 1] [2020-11-12 03:01:51,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:51,473 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1038277804, now seen corresponding path program 2 times [2020-11-12 03:01:51,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:51,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253047326] [2020-11-12 03:01:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:51,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253047326] [2020-11-12 03:01:51,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995237599] [2020-11-12 03:01:51,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:51,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:01:51,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:51,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:01:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:51,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:51,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:51,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-11-12 03:01:51,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785550791] [2020-11-12 03:01:51,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 03:01:51,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:51,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 03:01:51,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-12 03:01:51,753 INFO L87 Difference]: Start difference. First operand 1119 states and 1341 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:52,084 INFO L93 Difference]: Finished difference Result 2121 states and 2692 transitions. [2020-11-12 03:01:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 03:01:52,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 03:01:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:52,093 INFO L225 Difference]: With dead ends: 2121 [2020-11-12 03:01:52,094 INFO L226 Difference]: Without dead ends: 1793 [2020-11-12 03:01:52,094 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-12 03:01:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-11-12 03:01:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1144. [2020-11-12 03:01:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1032 states have (on average 1.3294573643410852) internal successors, (1372), 1143 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1372 transitions. [2020-11-12 03:01:52,132 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1372 transitions. Word has length 43 [2020-11-12 03:01:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:52,132 INFO L481 AbstractCegarLoop]: Abstraction has 1144 states and 1372 transitions. [2020-11-12 03:01:52,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1372 transitions. [2020-11-12 03:01:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:52,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:52,134 INFO L494 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, 1, 1] [2020-11-12 03:01:52,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:52,350 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:52,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1801206438, now seen corresponding path program 1 times [2020-11-12 03:01:52,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:52,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653635583] [2020-11-12 03:01:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653635583] [2020-11-12 03:01:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890408822] [2020-11-12 03:01:52,507 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 [2020-11-12 03:01:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:01:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:52,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:52,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:52,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:01:52,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309457179] [2020-11-12 03:01:52,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:01:52,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:52,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:01:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:01:52,729 INFO L87 Difference]: Start difference. First operand 1144 states and 1372 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:52,989 INFO L93 Difference]: Finished difference Result 2113 states and 2619 transitions. [2020-11-12 03:01:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 03:01:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2020-11-12 03:01:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:52,998 INFO L225 Difference]: With dead ends: 2113 [2020-11-12 03:01:52,998 INFO L226 Difference]: Without dead ends: 1809 [2020-11-12 03:01:52,999 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:01:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-11-12 03:01:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1233. [2020-11-12 03:01:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1121 states have (on average 1.3140053523639608) internal successors, (1473), 1232 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1473 transitions. [2020-11-12 03:01:53,055 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1473 transitions. Word has length 43 [2020-11-12 03:01:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:53,056 INFO L481 AbstractCegarLoop]: Abstraction has 1233 states and 1473 transitions. [2020-11-12 03:01:53,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1473 transitions. [2020-11-12 03:01:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:53,058 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:53,058 INFO L494 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, 1, 1] [2020-11-12 03:01:53,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:53,272 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2146566760, now seen corresponding path program 2 times [2020-11-12 03:01:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:53,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982601851] [2020-11-12 03:01:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:53,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982601851] [2020-11-12 03:01:53,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319780409] [2020-11-12 03:01:53,402 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 [2020-11-12 03:01:53,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:01:53,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:01:53,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:53,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:01:53,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:53,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:53,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:01:53,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795258338] [2020-11-12 03:01:53,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:01:53,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:01:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:01:53,569 INFO L87 Difference]: Start difference. First operand 1233 states and 1473 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:54,181 INFO L93 Difference]: Finished difference Result 2612 states and 3329 transitions. [2020-11-12 03:01:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 03:01:54,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2020-11-12 03:01:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:54,191 INFO L225 Difference]: With dead ends: 2612 [2020-11-12 03:01:54,191 INFO L226 Difference]: Without dead ends: 2132 [2020-11-12 03:01:54,192 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=973, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 03:01:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2020-11-12 03:01:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1323. [2020-11-12 03:01:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1211 states have (on average 1.3030553261767135) internal successors, (1578), 1322 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1578 transitions. [2020-11-12 03:01:54,241 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1578 transitions. Word has length 43 [2020-11-12 03:01:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:54,241 INFO L481 AbstractCegarLoop]: Abstraction has 1323 states and 1578 transitions. [2020-11-12 03:01:54,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1578 transitions. [2020-11-12 03:01:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:54,244 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:54,244 INFO L494 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, 1, 1] [2020-11-12 03:01:54,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-12 03:01:54,459 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1095210246, now seen corresponding path program 2 times [2020-11-12 03:01:54,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:54,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454303220] [2020-11-12 03:01:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:54,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454303220] [2020-11-12 03:01:54,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647879766] [2020-11-12 03:01:54,661 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:54,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:01:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:01:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:54,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:54,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:54,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:54,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 03:01:54,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607898929] [2020-11-12 03:01:54,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 03:01:54,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:54,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 03:01:54,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:01:54,934 INFO L87 Difference]: Start difference. First operand 1323 states and 1578 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:55,288 INFO L93 Difference]: Finished difference Result 2399 states and 2922 transitions. [2020-11-12 03:01:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 03:01:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 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 48 [2020-11-12 03:01:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:55,307 INFO L225 Difference]: With dead ends: 2399 [2020-11-12 03:01:55,307 INFO L226 Difference]: Without dead ends: 2071 [2020-11-12 03:01:55,310 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2020-11-12 03:01:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2020-11-12 03:01:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1333. [2020-11-12 03:01:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1221 states have (on average 1.3104013104013104) internal successors, (1600), 1332 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1600 transitions. [2020-11-12 03:01:55,392 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1600 transitions. Word has length 48 [2020-11-12 03:01:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:55,392 INFO L481 AbstractCegarLoop]: Abstraction has 1333 states and 1600 transitions. [2020-11-12 03:01:55,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1600 transitions. [2020-11-12 03:01:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:55,396 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:55,396 INFO L494 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, 1, 1] [2020-11-12 03:01:55,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:55,598 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1403585051, now seen corresponding path program 3 times [2020-11-12 03:01:55,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:55,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044731103] [2020-11-12 03:01:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:55,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044731103] [2020-11-12 03:01:55,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001312337] [2020-11-12 03:01:55,806 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:55,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:01:55,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:55,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:01:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:55,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:55,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:55,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-12 03:01:55,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985937896] [2020-11-12 03:01:55,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 03:01:55,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:55,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 03:01:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-12 03:01:55,944 INFO L87 Difference]: Start difference. First operand 1333 states and 1600 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:56,104 INFO L93 Difference]: Finished difference Result 2076 states and 2536 transitions. [2020-11-12 03:01:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 03:01:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 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 48 [2020-11-12 03:01:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:56,115 INFO L225 Difference]: With dead ends: 2076 [2020-11-12 03:01:56,115 INFO L226 Difference]: Without dead ends: 1924 [2020-11-12 03:01:56,116 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:01:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-11-12 03:01:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1358. [2020-11-12 03:01:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1246 states have (on average 1.3130016051364366) internal successors, (1636), 1357 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1636 transitions. [2020-11-12 03:01:56,155 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1636 transitions. Word has length 48 [2020-11-12 03:01:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:56,155 INFO L481 AbstractCegarLoop]: Abstraction has 1358 states and 1636 transitions. [2020-11-12 03:01:56,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1636 transitions. [2020-11-12 03:01:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:56,158 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:56,158 INFO L494 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, 1, 1] [2020-11-12 03:01:56,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:56,373 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2069768245, now seen corresponding path program 4 times [2020-11-12 03:01:56,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:56,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481336997] [2020-11-12 03:01:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:56,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481336997] [2020-11-12 03:01:56,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663552329] [2020-11-12 03:01:56,524 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:56,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:01:56,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:56,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:01:56,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:56,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:01:56,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:56,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:56,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:01:56,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183374183] [2020-11-12 03:01:56,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:01:56,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:56,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:01:56,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:01:56,769 INFO L87 Difference]: Start difference. First operand 1358 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:57,309 INFO L93 Difference]: Finished difference Result 2497 states and 3160 transitions. [2020-11-12 03:01:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 03:01:57,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2020-11-12 03:01:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:57,319 INFO L225 Difference]: With dead ends: 2497 [2020-11-12 03:01:57,320 INFO L226 Difference]: Without dead ends: 2169 [2020-11-12 03:01:57,320 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2020-11-12 03:01:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2020-11-12 03:01:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1358. [2020-11-12 03:01:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1246 states have (on average 1.3130016051364366) internal successors, (1636), 1357 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1636 transitions. [2020-11-12 03:01:57,367 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1636 transitions. Word has length 48 [2020-11-12 03:01:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:57,367 INFO L481 AbstractCegarLoop]: Abstraction has 1358 states and 1636 transitions. [2020-11-12 03:01:57,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1636 transitions. [2020-11-12 03:01:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:57,369 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:57,369 INFO L494 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, 1, 1] [2020-11-12 03:01:57,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-12 03:01:57,584 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 769715997, now seen corresponding path program 1 times [2020-11-12 03:01:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:57,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555006383] [2020-11-12 03:01:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:57,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555006383] [2020-11-12 03:01:57,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519969778] [2020-11-12 03:01:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:01:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:57,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:57,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:57,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:01:57,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556436355] [2020-11-12 03:01:57,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:01:57,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:57,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:01:57,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:01:57,924 INFO L87 Difference]: Start difference. First operand 1358 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:58,245 INFO L93 Difference]: Finished difference Result 2210 states and 2702 transitions. [2020-11-12 03:01:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 03:01:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2020-11-12 03:01:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:58,255 INFO L225 Difference]: With dead ends: 2210 [2020-11-12 03:01:58,255 INFO L226 Difference]: Without dead ends: 2058 [2020-11-12 03:01:58,260 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-11-12 03:01:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2020-11-12 03:01:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1358. [2020-11-12 03:01:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1246 states have (on average 1.3130016051364366) internal successors, (1636), 1357 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1636 transitions. [2020-11-12 03:01:58,298 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1636 transitions. Word has length 48 [2020-11-12 03:01:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:58,298 INFO L481 AbstractCegarLoop]: Abstraction has 1358 states and 1636 transitions. [2020-11-12 03:01:58,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1636 transitions. [2020-11-12 03:01:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:58,301 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:58,301 INFO L494 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, 1, 1] [2020-11-12 03:01:58,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 03:01:58,515 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1116910095, now seen corresponding path program 2 times [2020-11-12 03:01:58,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:58,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633099146] [2020-11-12 03:01:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:58,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633099146] [2020-11-12 03:01:58,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605646371] [2020-11-12 03:01:58,674 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:58,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:01:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:01:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:58,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:01:58,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:58,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:58,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:58,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:58,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 03:01:58,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836761505] [2020-11-12 03:01:58,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 03:01:58,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 03:01:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:01:59,000 INFO L87 Difference]: Start difference. First operand 1358 states and 1636 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:00,014 INFO L93 Difference]: Finished difference Result 3352 states and 4344 transitions. [2020-11-12 03:02:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 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 48 [2020-11-12 03:02:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:00,027 INFO L225 Difference]: With dead ends: 3352 [2020-11-12 03:02:00,027 INFO L226 Difference]: Without dead ends: 2696 [2020-11-12 03:02:00,029 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:02:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2020-11-12 03:02:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1415. [2020-11-12 03:02:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1303 states have (on average 1.3054489639293938) internal successors, (1701), 1414 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 1701 transitions. [2020-11-12 03:02:00,072 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 1701 transitions. Word has length 48 [2020-11-12 03:02:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:00,073 INFO L481 AbstractCegarLoop]: Abstraction has 1415 states and 1701 transitions. [2020-11-12 03:02:00,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 1701 transitions. [2020-11-12 03:02:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:00,075 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:00,075 INFO L494 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, 1, 1] [2020-11-12 03:02:00,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-12 03:02:00,291 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 945366927, now seen corresponding path program 3 times [2020-11-12 03:02:00,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:00,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329060828] [2020-11-12 03:02:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:00,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329060828] [2020-11-12 03:02:00,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318621170] [2020-11-12 03:02:00,431 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:00,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-12 03:02:00,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:00,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:00,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:00,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:00,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:00,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:00,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274978290] [2020-11-12 03:02:00,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:00,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:00,607 INFO L87 Difference]: Start difference. First operand 1415 states and 1701 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:00,987 INFO L93 Difference]: Finished difference Result 2516 states and 3069 transitions. [2020-11-12 03:02:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 03:02:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 48 [2020-11-12 03:02:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:00,994 INFO L225 Difference]: With dead ends: 2516 [2020-11-12 03:02:00,995 INFO L226 Difference]: Without dead ends: 2364 [2020-11-12 03:02:00,995 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2020-11-12 03:02:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2020-11-12 03:02:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1440. [2020-11-12 03:02:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1328 states have (on average 1.3042168674698795) internal successors, (1732), 1439 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1732 transitions. [2020-11-12 03:02:01,034 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1732 transitions. Word has length 48 [2020-11-12 03:02:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:01,034 INFO L481 AbstractCegarLoop]: Abstraction has 1440 states and 1732 transitions. [2020-11-12 03:02:01,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1732 transitions. [2020-11-12 03:02:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:01,037 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:01,037 INFO L494 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, 1, 1] [2020-11-12 03:02:01,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 03:02:01,250 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:01,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1345409599, now seen corresponding path program 4 times [2020-11-12 03:02:01,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:01,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916218412] [2020-11-12 03:02:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:01,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916218412] [2020-11-12 03:02:01,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187808439] [2020-11-12 03:02:01,390 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:01,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:01,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:01,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:01,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:01,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:01,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 03:02:01,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162721331] [2020-11-12 03:02:01,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 03:02:01,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 03:02:01,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:02:01,591 INFO L87 Difference]: Start difference. First operand 1440 states and 1732 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:02,717 INFO L93 Difference]: Finished difference Result 3751 states and 4832 transitions. [2020-11-12 03:02:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-12 03:02:02,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 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 48 [2020-11-12 03:02:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:02,724 INFO L225 Difference]: With dead ends: 3751 [2020-11-12 03:02:02,724 INFO L226 Difference]: Without dead ends: 3095 [2020-11-12 03:02:02,725 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=2177, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 03:02:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2020-11-12 03:02:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 1519. [2020-11-12 03:02:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1407 states have (on average 1.3034825870646767) internal successors, (1834), 1518 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1834 transitions. [2020-11-12 03:02:02,770 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1834 transitions. Word has length 48 [2020-11-12 03:02:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:02,770 INFO L481 AbstractCegarLoop]: Abstraction has 1519 states and 1834 transitions. [2020-11-12 03:02:02,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1834 transitions. [2020-11-12 03:02:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:02,773 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:02,773 INFO L494 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:02,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 03:02:02,988 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1996849156, now seen corresponding path program 5 times [2020-11-12 03:02:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:02,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64266190] [2020-11-12 03:02:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:03,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64266190] [2020-11-12 03:02:03,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111939268] [2020-11-12 03:02:03,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:03,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:02:03,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:03,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:03,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:03,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:03,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542397302] [2020-11-12 03:02:03,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:03,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:03,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:03,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:03,435 INFO L87 Difference]: Start difference. First operand 1519 states and 1834 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:03,660 INFO L93 Difference]: Finished difference Result 2361 states and 2898 transitions. [2020-11-12 03:02:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 03:02:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:03,665 INFO L225 Difference]: With dead ends: 2361 [2020-11-12 03:02:03,666 INFO L226 Difference]: Without dead ends: 2209 [2020-11-12 03:02:03,666 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-12 03:02:03,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2020-11-12 03:02:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1544. [2020-11-12 03:02:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1432 states have (on average 1.3058659217877095) internal successors, (1870), 1543 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1870 transitions. [2020-11-12 03:02:03,698 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1870 transitions. Word has length 53 [2020-11-12 03:02:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:03,699 INFO L481 AbstractCegarLoop]: Abstraction has 1544 states and 1870 transitions. [2020-11-12 03:02:03,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1870 transitions. [2020-11-12 03:02:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:03,701 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:03,701 INFO L494 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:03,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:03,916 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1476504140, now seen corresponding path program 6 times [2020-11-12 03:02:03,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:03,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239737273] [2020-11-12 03:02:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:04,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239737273] [2020-11-12 03:02:04,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722672777] [2020-11-12 03:02:04,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:04,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:02:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:04,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:04,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:04,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:04,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2020-11-12 03:02:04,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877765596] [2020-11-12 03:02:04,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:02:04,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:02:04,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:02:04,211 INFO L87 Difference]: Start difference. First operand 1544 states and 1870 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:04,606 INFO L93 Difference]: Finished difference Result 2777 states and 3502 transitions. [2020-11-12 03:02:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 03:02:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 53 [2020-11-12 03:02:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:04,610 INFO L225 Difference]: With dead ends: 2777 [2020-11-12 03:02:04,610 INFO L226 Difference]: Without dead ends: 2449 [2020-11-12 03:02:04,610 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-11-12 03:02:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2020-11-12 03:02:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1544. [2020-11-12 03:02:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1432 states have (on average 1.3058659217877095) internal successors, (1870), 1543 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:04,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1870 transitions. [2020-11-12 03:02:04,644 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1870 transitions. Word has length 53 [2020-11-12 03:02:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:04,644 INFO L481 AbstractCegarLoop]: Abstraction has 1544 states and 1870 transitions. [2020-11-12 03:02:04,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1870 transitions. [2020-11-12 03:02:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:04,647 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:04,647 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:04,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:04,861 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1362980102, now seen corresponding path program 5 times [2020-11-12 03:02:04,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:04,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497045355] [2020-11-12 03:02:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:04,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497045355] [2020-11-12 03:02:04,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647256381] [2020-11-12 03:02:04,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:05,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:05,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:05,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:05,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:05,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:05,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056351950] [2020-11-12 03:02:05,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:05,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:05,275 INFO L87 Difference]: Start difference. First operand 1544 states and 1870 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:05,647 INFO L93 Difference]: Finished difference Result 2577 states and 3162 transitions. [2020-11-12 03:02:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 03:02:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:05,651 INFO L225 Difference]: With dead ends: 2577 [2020-11-12 03:02:05,651 INFO L226 Difference]: Without dead ends: 2425 [2020-11-12 03:02:05,652 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-11-12 03:02:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2020-11-12 03:02:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1578. [2020-11-12 03:02:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1466 states have (on average 1.3015006821282402) internal successors, (1908), 1577 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 1908 transitions. [2020-11-12 03:02:05,687 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 1908 transitions. Word has length 53 [2020-11-12 03:02:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:05,687 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 1908 transitions. [2020-11-12 03:02:05,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 1908 transitions. [2020-11-12 03:02:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:05,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:05,690 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:05,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-12 03:02:05,905 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:05,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1710174200, now seen corresponding path program 6 times [2020-11-12 03:02:05,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:05,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338271663] [2020-11-12 03:02:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:06,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338271663] [2020-11-12 03:02:06,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497447080] [2020-11-12 03:02:06,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:06,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:02:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:06,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:06,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:06,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:06,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443816855] [2020-11-12 03:02:06,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:06,292 INFO L87 Difference]: Start difference. First operand 1578 states and 1908 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:07,115 INFO L93 Difference]: Finished difference Result 3009 states and 3786 transitions. [2020-11-12 03:02:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 03:02:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:07,119 INFO L225 Difference]: With dead ends: 3009 [2020-11-12 03:02:07,120 INFO L226 Difference]: Without dead ends: 2681 [2020-11-12 03:02:07,120 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 03:02:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2020-11-12 03:02:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 1585. [2020-11-12 03:02:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1473 states have (on average 1.3014256619144602) internal successors, (1917), 1584 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 1917 transitions. [2020-11-12 03:02:07,154 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 1917 transitions. Word has length 53 [2020-11-12 03:02:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:07,155 INFO L481 AbstractCegarLoop]: Abstraction has 1585 states and 1917 transitions. [2020-11-12 03:02:07,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 1917 transitions. [2020-11-12 03:02:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:07,157 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:07,158 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:07,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:07,371 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:07,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:07,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1538631032, now seen corresponding path program 7 times [2020-11-12 03:02:07,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:07,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137631695] [2020-11-12 03:02:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:07,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137631695] [2020-11-12 03:02:07,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126270940] [2020-11-12 03:02:07,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:07,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:07,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:07,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:07,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174730750] [2020-11-12 03:02:07,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:07,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:07,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:07,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:07,792 INFO L87 Difference]: Start difference. First operand 1585 states and 1917 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:08,296 INFO L93 Difference]: Finished difference Result 2628 states and 3231 transitions. [2020-11-12 03:02:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 03:02:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:08,302 INFO L225 Difference]: With dead ends: 2628 [2020-11-12 03:02:08,303 INFO L226 Difference]: Without dead ends: 2476 [2020-11-12 03:02:08,303 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-12 03:02:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2020-11-12 03:02:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1589. [2020-11-12 03:02:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1477 states have (on average 1.3006093432633716) internal successors, (1921), 1588 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 1921 transitions. [2020-11-12 03:02:08,334 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 1921 transitions. Word has length 53 [2020-11-12 03:02:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:08,334 INFO L481 AbstractCegarLoop]: Abstraction has 1589 states and 1921 transitions. [2020-11-12 03:02:08,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 1921 transitions. [2020-11-12 03:02:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:08,337 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:08,337 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:08,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 03:02:08,552 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:08,552 INFO L82 PathProgramCache]: Analyzing trace with hash -752145494, now seen corresponding path program 8 times [2020-11-12 03:02:08,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:08,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203508971] [2020-11-12 03:02:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:08,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203508971] [2020-11-12 03:02:08,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787850069] [2020-11-12 03:02:08,707 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:08,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:08,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:08,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:08,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:09,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:09,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:09,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:09,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859093531] [2020-11-12 03:02:09,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:09,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:09,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:09,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:09,054 INFO L87 Difference]: Start difference. First operand 1589 states and 1921 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:10,317 INFO L93 Difference]: Finished difference Result 3030 states and 3819 transitions. [2020-11-12 03:02:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:10,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:10,322 INFO L225 Difference]: With dead ends: 3030 [2020-11-12 03:02:10,322 INFO L226 Difference]: Without dead ends: 2702 [2020-11-12 03:02:10,324 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:02:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2020-11-12 03:02:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 1611. [2020-11-12 03:02:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1499 states have (on average 1.2975316877918612) internal successors, (1945), 1610 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 1945 transitions. [2020-11-12 03:02:10,362 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 1945 transitions. Word has length 53 [2020-11-12 03:02:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:10,362 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 1945 transitions. [2020-11-12 03:02:10,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 1945 transitions. [2020-11-12 03:02:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:10,365 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:10,365 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:10,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-12 03:02:10,580 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash -753227568, now seen corresponding path program 9 times [2020-11-12 03:02:10,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:10,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446656420] [2020-11-12 03:02:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:10,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446656420] [2020-11-12 03:02:10,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121433829] [2020-11-12 03:02:10,753 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:10,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:02:10,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:10,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:10,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:10,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:10,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553166566] [2020-11-12 03:02:10,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:10,988 INFO L87 Difference]: Start difference. First operand 1611 states and 1945 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:11,585 INFO L93 Difference]: Finished difference Result 2793 states and 3424 transitions. [2020-11-12 03:02:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-12 03:02:11,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:11,592 INFO L225 Difference]: With dead ends: 2793 [2020-11-12 03:02:11,592 INFO L226 Difference]: Without dead ends: 2641 [2020-11-12 03:02:11,593 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 03:02:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2020-11-12 03:02:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1642. [2020-11-12 03:02:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1530 states have (on average 1.2980392156862746) internal successors, (1986), 1641 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1986 transitions. [2020-11-12 03:02:11,626 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1986 transitions. Word has length 53 [2020-11-12 03:02:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:11,626 INFO L481 AbstractCegarLoop]: Abstraction has 1642 states and 1986 transitions. [2020-11-12 03:02:11,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1986 transitions. [2020-11-12 03:02:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:11,629 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:11,629 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:11,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 03:02:11,843 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash 482396802, now seen corresponding path program 10 times [2020-11-12 03:02:11,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:11,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069189656] [2020-11-12 03:02:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069189656] [2020-11-12 03:02:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571203865] [2020-11-12 03:02:12,037 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:12,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:12,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:12,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:12,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:12,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:12,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 03:02:12,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372743220] [2020-11-12 03:02:12,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:12,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:12,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:12,346 INFO L87 Difference]: Start difference. First operand 1642 states and 1986 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:14,040 INFO L93 Difference]: Finished difference Result 4295 states and 5525 transitions. [2020-11-12 03:02:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 03:02:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 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 53 [2020-11-12 03:02:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:14,048 INFO L225 Difference]: With dead ends: 4295 [2020-11-12 03:02:14,048 INFO L226 Difference]: Without dead ends: 3551 [2020-11-12 03:02:14,050 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=771, Invalid=2889, Unknown=0, NotChecked=0, Total=3660 [2020-11-12 03:02:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2020-11-12 03:02:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 1842. [2020-11-12 03:02:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1730 states have (on average 1.2867052023121388) internal successors, (2226), 1841 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2226 transitions. [2020-11-12 03:02:14,094 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2226 transitions. Word has length 53 [2020-11-12 03:02:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:14,094 INFO L481 AbstractCegarLoop]: Abstraction has 1842 states and 2226 transitions. [2020-11-12 03:02:14,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2226 transitions. [2020-11-12 03:02:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:14,098 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:14,098 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:14,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-12 03:02:14,314 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:14,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2144243594, now seen corresponding path program 11 times [2020-11-12 03:02:14,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:14,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133141510] [2020-11-12 03:02:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:14,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133141510] [2020-11-12 03:02:14,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240770173] [2020-11-12 03:02:14,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:14,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:14,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:14,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:14,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:14,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:14,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328907739] [2020-11-12 03:02:14,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:14,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:14,741 INFO L87 Difference]: Start difference. First operand 1842 states and 2226 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:15,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:15,397 INFO L93 Difference]: Finished difference Result 3283 states and 4008 transitions. [2020-11-12 03:02:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:02:15,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:15,401 INFO L225 Difference]: With dead ends: 3283 [2020-11-12 03:02:15,401 INFO L226 Difference]: Without dead ends: 3131 [2020-11-12 03:02:15,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 03:02:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2020-11-12 03:02:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 1843. [2020-11-12 03:02:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1731 states have (on average 1.2876949740034662) internal successors, (2229), 1842 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2229 transitions. [2020-11-12 03:02:15,467 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2229 transitions. Word has length 53 [2020-11-12 03:02:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:15,467 INFO L481 AbstractCegarLoop]: Abstraction has 1843 states and 2229 transitions. [2020-11-12 03:02:15,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2229 transitions. [2020-11-12 03:02:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:15,470 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:15,471 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:15,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-12 03:02:15,685 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2008367026, now seen corresponding path program 12 times [2020-11-12 03:02:15,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:15,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816917199] [2020-11-12 03:02:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:15,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816917199] [2020-11-12 03:02:15,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219129755] [2020-11-12 03:02:15,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:15,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:02:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:16,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:16,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:16,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:16,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:16,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214082485] [2020-11-12 03:02:16,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:16,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:16,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:16,053 INFO L87 Difference]: Start difference. First operand 1843 states and 2229 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:17,235 INFO L93 Difference]: Finished difference Result 3592 states and 4487 transitions. [2020-11-12 03:02:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 03:02:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:17,239 INFO L225 Difference]: With dead ends: 3592 [2020-11-12 03:02:17,240 INFO L226 Difference]: Without dead ends: 3264 [2020-11-12 03:02:17,241 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 03:02:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2020-11-12 03:02:17,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 1844. [2020-11-12 03:02:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1732 states have (on average 1.2875288683602772) internal successors, (2230), 1843 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2230 transitions. [2020-11-12 03:02:17,279 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2230 transitions. Word has length 53 [2020-11-12 03:02:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:17,279 INFO L481 AbstractCegarLoop]: Abstraction has 1844 states and 2230 transitions. [2020-11-12 03:02:17,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2230 transitions. [2020-11-12 03:02:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:17,282 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:17,283 INFO L494 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:17,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:17,497 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash -8243784, now seen corresponding path program 3 times [2020-11-12 03:02:17,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:17,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795428447] [2020-11-12 03:02:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:17,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795428447] [2020-11-12 03:02:17,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521450976] [2020-11-12 03:02:17,640 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:17,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:02:17,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:17,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:17,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:17,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:17,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103582392] [2020-11-12 03:02:17,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:17,893 INFO L87 Difference]: Start difference. First operand 1844 states and 2230 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:18,326 INFO L93 Difference]: Finished difference Result 2960 states and 3639 transitions. [2020-11-12 03:02:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 03:02:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:18,329 INFO L225 Difference]: With dead ends: 2960 [2020-11-12 03:02:18,329 INFO L226 Difference]: Without dead ends: 2808 [2020-11-12 03:02:18,330 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2020-11-12 03:02:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2020-11-12 03:02:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1874. [2020-11-12 03:02:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1762 states have (on average 1.2894438138479) internal successors, (2272), 1873 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2272 transitions. [2020-11-12 03:02:18,365 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2272 transitions. Word has length 53 [2020-11-12 03:02:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:18,365 INFO L481 AbstractCegarLoop]: Abstraction has 1874 states and 2272 transitions. [2020-11-12 03:02:18,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2272 transitions. [2020-11-12 03:02:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:18,368 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:18,368 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:18,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-12 03:02:18,581 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1381804116, now seen corresponding path program 13 times [2020-11-12 03:02:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:18,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258215521] [2020-11-12 03:02:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:18,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258215521] [2020-11-12 03:02:18,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357889212] [2020-11-12 03:02:18,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:18,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:18,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:18,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824244723] [2020-11-12 03:02:18,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:18,954 INFO L87 Difference]: Start difference. First operand 1874 states and 2272 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:19,310 INFO L93 Difference]: Finished difference Result 3085 states and 3782 transitions. [2020-11-12 03:02:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 03:02:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:19,314 INFO L225 Difference]: With dead ends: 3085 [2020-11-12 03:02:19,314 INFO L226 Difference]: Without dead ends: 2933 [2020-11-12 03:02:19,316 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2020-11-12 03:02:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2020-11-12 03:02:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1855. [2020-11-12 03:02:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1743 states have (on average 1.2891566265060241) internal successors, (2247), 1854 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2247 transitions. [2020-11-12 03:02:19,348 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2247 transitions. Word has length 53 [2020-11-12 03:02:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:19,349 INFO L481 AbstractCegarLoop]: Abstraction has 1855 states and 2247 transitions. [2020-11-12 03:02:19,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2247 transitions. [2020-11-12 03:02:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:19,352 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:19,352 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:19,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:19,561 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:19,561 INFO L82 PathProgramCache]: Analyzing trace with hash -296997820, now seen corresponding path program 14 times [2020-11-12 03:02:19,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:19,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570159819] [2020-11-12 03:02:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570159819] [2020-11-12 03:02:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852437110] [2020-11-12 03:02:19,700 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:19,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:19,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:19,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:19,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:19,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:19,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:19,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558005615] [2020-11-12 03:02:19,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:19,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:19,918 INFO L87 Difference]: Start difference. First operand 1855 states and 2247 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:20,265 INFO L93 Difference]: Finished difference Result 3005 states and 3686 transitions. [2020-11-12 03:02:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 03:02:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:20,270 INFO L225 Difference]: With dead ends: 3005 [2020-11-12 03:02:20,270 INFO L226 Difference]: Without dead ends: 2853 [2020-11-12 03:02:20,270 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-11-12 03:02:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2020-11-12 03:02:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 1855. [2020-11-12 03:02:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1743 states have (on average 1.2891566265060241) internal successors, (2247), 1854 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2247 transitions. [2020-11-12 03:02:20,303 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2247 transitions. Word has length 53 [2020-11-12 03:02:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:20,303 INFO L481 AbstractCegarLoop]: Abstraction has 1855 states and 2247 transitions. [2020-11-12 03:02:20,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2247 transitions. [2020-11-12 03:02:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:20,307 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:20,307 INFO L494 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:20,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-12 03:02:20,521 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash -752190806, now seen corresponding path program 4 times [2020-11-12 03:02:20,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:20,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177940005] [2020-11-12 03:02:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:20,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177940005] [2020-11-12 03:02:20,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777036370] [2020-11-12 03:02:20,665 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:20,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:20,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:20,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:20,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:20,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:20,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:20,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801792126] [2020-11-12 03:02:20,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:20,891 INFO L87 Difference]: Start difference. First operand 1855 states and 2247 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:21,908 INFO L93 Difference]: Finished difference Result 3566 states and 4459 transitions. [2020-11-12 03:02:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:21,914 INFO L225 Difference]: With dead ends: 3566 [2020-11-12 03:02:21,914 INFO L226 Difference]: Without dead ends: 3238 [2020-11-12 03:02:21,917 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 03:02:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2020-11-12 03:02:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 1917. [2020-11-12 03:02:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1805 states have (on average 1.2869806094182825) internal successors, (2323), 1916 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2323 transitions. [2020-11-12 03:02:21,961 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2323 transitions. Word has length 53 [2020-11-12 03:02:21,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:21,961 INFO L481 AbstractCegarLoop]: Abstraction has 1917 states and 2323 transitions. [2020-11-12 03:02:21,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2323 transitions. [2020-11-12 03:02:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:21,965 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:21,965 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:22,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:22,178 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash -518764706, now seen corresponding path program 15 times [2020-11-12 03:02:22,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:22,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971570661] [2020-11-12 03:02:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:22,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971570661] [2020-11-12 03:02:22,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263753681] [2020-11-12 03:02:22,312 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:22,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:02:22,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:22,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:22,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:22,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618890695] [2020-11-12 03:02:22,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:22,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:22,512 INFO L87 Difference]: Start difference. First operand 1917 states and 2323 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:23,067 INFO L93 Difference]: Finished difference Result 3280 states and 4013 transitions. [2020-11-12 03:02:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 03:02:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:23,070 INFO L225 Difference]: With dead ends: 3280 [2020-11-12 03:02:23,070 INFO L226 Difference]: Without dead ends: 3128 [2020-11-12 03:02:23,071 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2020-11-12 03:02:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2020-11-12 03:02:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 1892. [2020-11-12 03:02:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1780 states have (on average 1.2876404494382023) internal successors, (2292), 1891 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2292 transitions. [2020-11-12 03:02:23,107 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2292 transitions. Word has length 53 [2020-11-12 03:02:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:23,107 INFO L481 AbstractCegarLoop]: Abstraction has 1892 states and 2292 transitions. [2020-11-12 03:02:23,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2292 transitions. [2020-11-12 03:02:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:23,110 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:23,111 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:23,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-12 03:02:23,325 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash -382888138, now seen corresponding path program 16 times [2020-11-12 03:02:23,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:23,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317088329] [2020-11-12 03:02:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:23,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317088329] [2020-11-12 03:02:23,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156596169] [2020-11-12 03:02:23,462 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:23,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:23,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:23,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:23,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:23,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:23,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:23,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:23,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49694678] [2020-11-12 03:02:23,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:23,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:23,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:23,694 INFO L87 Difference]: Start difference. First operand 1892 states and 2292 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:24,794 INFO L93 Difference]: Finished difference Result 3771 states and 4718 transitions. [2020-11-12 03:02:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 03:02:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:24,798 INFO L225 Difference]: With dead ends: 3771 [2020-11-12 03:02:24,798 INFO L226 Difference]: Without dead ends: 3443 [2020-11-12 03:02:24,799 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 03:02:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2020-11-12 03:02:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 1887. [2020-11-12 03:02:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1775 states have (on average 1.2850704225352112) internal successors, (2281), 1886 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2281 transitions. [2020-11-12 03:02:24,837 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2281 transitions. Word has length 53 [2020-11-12 03:02:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:24,838 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 2281 transitions. [2020-11-12 03:02:24,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2281 transitions. [2020-11-12 03:02:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:24,842 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:24,842 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:25,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:25,056 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash -702095706, now seen corresponding path program 3 times [2020-11-12 03:02:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:25,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26524953] [2020-11-12 03:02:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26524953] [2020-11-12 03:02:25,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309121211] [2020-11-12 03:02:25,291 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:25,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 03:02:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:25,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:25,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:25,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:25,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:25,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774923887] [2020-11-12 03:02:25,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:25,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:25,541 INFO L87 Difference]: Start difference. First operand 1887 states and 2281 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:25,894 INFO L93 Difference]: Finished difference Result 3053 states and 3722 transitions. [2020-11-12 03:02:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 03:02:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:25,898 INFO L225 Difference]: With dead ends: 3053 [2020-11-12 03:02:25,898 INFO L226 Difference]: Without dead ends: 2725 [2020-11-12 03:02:25,899 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 03:02:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2020-11-12 03:02:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1897. [2020-11-12 03:02:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1785 states have (on average 1.2901960784313726) internal successors, (2303), 1896 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2303 transitions. [2020-11-12 03:02:25,934 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2303 transitions. Word has length 58 [2020-11-12 03:02:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:25,934 INFO L481 AbstractCegarLoop]: Abstraction has 1897 states and 2303 transitions. [2020-11-12 03:02:25,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2303 transitions. [2020-11-12 03:02:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:25,937 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:25,937 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:26,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-12 03:02:26,153 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash -393720901, now seen corresponding path program 7 times [2020-11-12 03:02:26,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:26,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276796060] [2020-11-12 03:02:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:26,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276796060] [2020-11-12 03:02:26,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147038115] [2020-11-12 03:02:26,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:26,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:26,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:26,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:26,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603484936] [2020-11-12 03:02:26,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:26,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:26,618 INFO L87 Difference]: Start difference. First operand 1897 states and 2303 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:26,954 INFO L93 Difference]: Finished difference Result 2955 states and 3607 transitions. [2020-11-12 03:02:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 03:02:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:26,970 INFO L225 Difference]: With dead ends: 2955 [2020-11-12 03:02:26,971 INFO L226 Difference]: Without dead ends: 2803 [2020-11-12 03:02:26,971 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-11-12 03:02:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2020-11-12 03:02:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1922. [2020-11-12 03:02:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1810 states have (on average 1.2922651933701657) internal successors, (2339), 1921 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2339 transitions. [2020-11-12 03:02:26,992 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2339 transitions. Word has length 58 [2020-11-12 03:02:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:26,992 INFO L481 AbstractCegarLoop]: Abstraction has 1922 states and 2339 transitions. [2020-11-12 03:02:26,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2339 transitions. [2020-11-12 03:02:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:26,995 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:26,996 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:27,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:27,210 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:27,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:27,211 INFO L82 PathProgramCache]: Analyzing trace with hash 427893099, now seen corresponding path program 8 times [2020-11-12 03:02:27,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:27,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915716557] [2020-11-12 03:02:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:27,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915716557] [2020-11-12 03:02:27,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308585953] [2020-11-12 03:02:27,366 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:27,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:27,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:27,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:27,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:27,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:27,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2020-11-12 03:02:27,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080313533] [2020-11-12 03:02:27,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:27,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:27,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:27,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:27,519 INFO L87 Difference]: Start difference. First operand 1922 states and 2339 transitions. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:28,115 INFO L93 Difference]: Finished difference Result 4068 states and 5191 transitions. [2020-11-12 03:02:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:02:28,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:28,119 INFO L225 Difference]: With dead ends: 4068 [2020-11-12 03:02:28,119 INFO L226 Difference]: Without dead ends: 3564 [2020-11-12 03:02:28,120 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 03:02:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2020-11-12 03:02:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 1888. [2020-11-12 03:02:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1776 states have (on average 1.2956081081081081) internal successors, (2301), 1887 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2301 transitions. [2020-11-12 03:02:28,155 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2301 transitions. Word has length 58 [2020-11-12 03:02:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:28,156 INFO L481 AbstractCegarLoop]: Abstraction has 1888 states and 2301 transitions. [2020-11-12 03:02:28,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2301 transitions. [2020-11-12 03:02:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:28,158 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:28,159 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:02:28,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-12 03:02:28,373 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -851939025, now seen corresponding path program 17 times [2020-11-12 03:02:28,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:28,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431502959] [2020-11-12 03:02:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:28,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431502959] [2020-11-12 03:02:28,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489825655] [2020-11-12 03:02:28,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:28,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:02:28,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:28,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:28,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:28,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:28,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:28,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659356337] [2020-11-12 03:02:28,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:28,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:28,969 INFO L87 Difference]: Start difference. First operand 1888 states and 2301 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:30,435 INFO L93 Difference]: Finished difference Result 3441 states and 4269 transitions. [2020-11-12 03:02:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 03:02:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:30,439 INFO L225 Difference]: With dead ends: 3441 [2020-11-12 03:02:30,439 INFO L226 Difference]: Without dead ends: 3201 [2020-11-12 03:02:30,440 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2020-11-12 03:02:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2020-11-12 03:02:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 1888. [2020-11-12 03:02:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1776 states have (on average 1.2956081081081081) internal successors, (2301), 1887 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2301 transitions. [2020-11-12 03:02:30,473 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2301 transitions. Word has length 58 [2020-11-12 03:02:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:30,474 INFO L481 AbstractCegarLoop]: Abstraction has 1888 states and 2301 transitions. [2020-11-12 03:02:30,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2301 transitions. [2020-11-12 03:02:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:30,476 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:30,477 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:02:30,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-12 03:02:30,682 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1152251745, now seen corresponding path program 18 times [2020-11-12 03:02:30,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:30,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817377097] [2020-11-12 03:02:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:30,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817377097] [2020-11-12 03:02:30,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334516199] [2020-11-12 03:02:30,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:30,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:02:30,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:30,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:31,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:31,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:31,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:31,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:31,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594595998] [2020-11-12 03:02:31,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:31,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:31,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:31,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:31,220 INFO L87 Difference]: Start difference. First operand 1888 states and 2301 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:32,669 INFO L93 Difference]: Finished difference Result 3770 states and 4721 transitions. [2020-11-12 03:02:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 03:02:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:32,673 INFO L225 Difference]: With dead ends: 3770 [2020-11-12 03:02:32,674 INFO L226 Difference]: Without dead ends: 3442 [2020-11-12 03:02:32,675 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=623, Invalid=2133, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 03:02:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2020-11-12 03:02:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 1878. [2020-11-12 03:02:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1766 states have (on average 1.297281993204983) internal successors, (2291), 1877 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2291 transitions. [2020-11-12 03:02:32,712 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2291 transitions. Word has length 58 [2020-11-12 03:02:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:32,713 INFO L481 AbstractCegarLoop]: Abstraction has 1878 states and 2291 transitions. [2020-11-12 03:02:32,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2291 transitions. [2020-11-12 03:02:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:32,716 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:32,716 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:32,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-12 03:02:32,930 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1151169671, now seen corresponding path program 19 times [2020-11-12 03:02:32,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:32,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282156061] [2020-11-12 03:02:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282156061] [2020-11-12 03:02:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003860894] [2020-11-12 03:02:33,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:33,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:33,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:33,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:33,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:33,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368560765] [2020-11-12 03:02:33,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:33,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:33,491 INFO L87 Difference]: Start difference. First operand 1878 states and 2291 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:34,364 INFO L93 Difference]: Finished difference Result 3433 states and 4205 transitions. [2020-11-12 03:02:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 03:02:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:34,369 INFO L225 Difference]: With dead ends: 3433 [2020-11-12 03:02:34,369 INFO L226 Difference]: Without dead ends: 3281 [2020-11-12 03:02:34,370 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 03:02:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-11-12 03:02:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 1903. [2020-11-12 03:02:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1791 states have (on average 1.2964824120603016) internal successors, (2322), 1902 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2322 transitions. [2020-11-12 03:02:34,397 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2322 transitions. Word has length 58 [2020-11-12 03:02:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:34,398 INFO L481 AbstractCegarLoop]: Abstraction has 1903 states and 2322 transitions. [2020-11-12 03:02:34,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2322 transitions. [2020-11-12 03:02:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:34,400 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:34,400 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:34,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-12 03:02:34,610 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash 894524361, now seen corresponding path program 20 times [2020-11-12 03:02:34,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:34,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350431890] [2020-11-12 03:02:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:34,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350431890] [2020-11-12 03:02:34,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429535230] [2020-11-12 03:02:34,833 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:34,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:34,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:35,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:35,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:35,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:35,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:35,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:35,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950663187] [2020-11-12 03:02:35,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:35,210 INFO L87 Difference]: Start difference. First operand 1903 states and 2322 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:36,127 INFO L93 Difference]: Finished difference Result 3358 states and 4120 transitions. [2020-11-12 03:02:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 03:02:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:36,131 INFO L225 Difference]: With dead ends: 3358 [2020-11-12 03:02:36,131 INFO L226 Difference]: Without dead ends: 3206 [2020-11-12 03:02:36,132 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 03:02:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2020-11-12 03:02:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 1903. [2020-11-12 03:02:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1791 states have (on average 1.2964824120603016) internal successors, (2322), 1902 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2322 transitions. [2020-11-12 03:02:36,158 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2322 transitions. Word has length 58 [2020-11-12 03:02:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:36,159 INFO L481 AbstractCegarLoop]: Abstraction has 1903 states and 2322 transitions. [2020-11-12 03:02:36,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2322 transitions. [2020-11-12 03:02:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:36,161 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:36,161 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:36,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:36,375 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:36,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1908173255, now seen corresponding path program 21 times [2020-11-12 03:02:36,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:36,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272532306] [2020-11-12 03:02:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:36,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272532306] [2020-11-12 03:02:36,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473192738] [2020-11-12 03:02:36,555 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:36,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:02:36,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:36,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:36,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:36,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:36,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:36,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:36,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:36,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69425932] [2020-11-12 03:02:36,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:36,901 INFO L87 Difference]: Start difference. First operand 1903 states and 2322 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:39,163 INFO L93 Difference]: Finished difference Result 4371 states and 5555 transitions. [2020-11-12 03:02:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 03:02:39,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:39,167 INFO L225 Difference]: With dead ends: 4371 [2020-11-12 03:02:39,167 INFO L226 Difference]: Without dead ends: 3867 [2020-11-12 03:02:39,169 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 03:02:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2020-11-12 03:02:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 1911. [2020-11-12 03:02:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1799 states have (on average 1.2996108949416343) internal successors, (2338), 1910 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2338 transitions. [2020-11-12 03:02:39,203 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2338 transitions. Word has length 58 [2020-11-12 03:02:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:39,203 INFO L481 AbstractCegarLoop]: Abstraction has 1911 states and 2338 transitions. [2020-11-12 03:02:39,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2338 transitions. [2020-11-12 03:02:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:39,206 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:39,206 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:39,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-12 03:02:39,414 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash -473272455, now seen corresponding path program 22 times [2020-11-12 03:02:39,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:39,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255300486] [2020-11-12 03:02:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:39,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255300486] [2020-11-12 03:02:39,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630446798] [2020-11-12 03:02:39,601 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:39,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:39,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:39,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:39,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:39,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:39,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:39,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629050907] [2020-11-12 03:02:39,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:39,925 INFO L87 Difference]: Start difference. First operand 1911 states and 2338 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:42,007 INFO L93 Difference]: Finished difference Result 3854 states and 4832 transitions. [2020-11-12 03:02:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-12 03:02:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:42,011 INFO L225 Difference]: With dead ends: 3854 [2020-11-12 03:02:42,011 INFO L226 Difference]: Without dead ends: 3526 [2020-11-12 03:02:42,012 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2020-11-12 03:02:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3526 states. [2020-11-12 03:02:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3526 to 1926. [2020-11-12 03:02:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1814 states have (on average 1.2993384785005513) internal successors, (2357), 1925 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2357 transitions. [2020-11-12 03:02:42,039 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2357 transitions. Word has length 58 [2020-11-12 03:02:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:42,039 INFO L481 AbstractCegarLoop]: Abstraction has 1926 states and 2357 transitions. [2020-11-12 03:02:42,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2357 transitions. [2020-11-12 03:02:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:42,042 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:42,042 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:02:42,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-12 03:02:42,244 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1237364593, now seen corresponding path program 23 times [2020-11-12 03:02:42,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:42,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081029670] [2020-11-12 03:02:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:42,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081029670] [2020-11-12 03:02:42,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324834303] [2020-11-12 03:02:42,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:42,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:02:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:42,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:42,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:42,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:42,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:42,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:42,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686157918] [2020-11-12 03:02:42,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:42,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:42,775 INFO L87 Difference]: Start difference. First operand 1926 states and 2357 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:43,952 INFO L93 Difference]: Finished difference Result 3984 states and 4989 transitions. [2020-11-12 03:02:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 03:02:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:43,956 INFO L225 Difference]: With dead ends: 3984 [2020-11-12 03:02:43,957 INFO L226 Difference]: Without dead ends: 3592 [2020-11-12 03:02:43,957 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:02:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2020-11-12 03:02:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2071. [2020-11-12 03:02:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1959 states have (on average 1.2909647779479325) internal successors, (2529), 2070 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2529 transitions. [2020-11-12 03:02:43,982 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2529 transitions. Word has length 58 [2020-11-12 03:02:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:43,982 INFO L481 AbstractCegarLoop]: Abstraction has 2071 states and 2529 transitions. [2020-11-12 03:02:43,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2529 transitions. [2020-11-12 03:02:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:43,984 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:43,984 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:44,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:44,188 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash 522593123, now seen corresponding path program 24 times [2020-11-12 03:02:44,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:44,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62315173] [2020-11-12 03:02:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:44,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62315173] [2020-11-12 03:02:44,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572424650] [2020-11-12 03:02:44,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:44,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:02:44,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:44,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:44,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:44,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:44,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:44,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974337435] [2020-11-12 03:02:44,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:44,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:44,669 INFO L87 Difference]: Start difference. First operand 2071 states and 2529 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:45,583 INFO L93 Difference]: Finished difference Result 3749 states and 4606 transitions. [2020-11-12 03:02:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 03:02:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:45,587 INFO L225 Difference]: With dead ends: 3749 [2020-11-12 03:02:45,588 INFO L226 Difference]: Without dead ends: 3597 [2020-11-12 03:02:45,588 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 03:02:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2020-11-12 03:02:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2084. [2020-11-12 03:02:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 1972 states have (on average 1.2920892494929006) internal successors, (2548), 2083 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2548 transitions. [2020-11-12 03:02:45,614 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2548 transitions. Word has length 58 [2020-11-12 03:02:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:45,614 INFO L481 AbstractCegarLoop]: Abstraction has 2084 states and 2548 transitions. [2020-11-12 03:02:45,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2548 transitions. [2020-11-12 03:02:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:45,616 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:45,616 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:02:45,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-12 03:02:45,817 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash 769687391, now seen corresponding path program 25 times [2020-11-12 03:02:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:45,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849505648] [2020-11-12 03:02:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:46,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849505648] [2020-11-12 03:02:46,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772595286] [2020-11-12 03:02:46,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:46,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:46,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:46,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:46,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:46,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:46,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487773093] [2020-11-12 03:02:46,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:46,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:46,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:46,332 INFO L87 Difference]: Start difference. First operand 2084 states and 2548 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:48,640 INFO L93 Difference]: Finished difference Result 5221 states and 6665 transitions. [2020-11-12 03:02:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-12 03:02:48,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:48,645 INFO L225 Difference]: With dead ends: 5221 [2020-11-12 03:02:48,646 INFO L226 Difference]: Without dead ends: 4565 [2020-11-12 03:02:48,646 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1121, Invalid=4135, Unknown=0, NotChecked=0, Total=5256 [2020-11-12 03:02:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2020-11-12 03:02:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 2173. [2020-11-12 03:02:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2061 states have (on average 1.2925764192139737) internal successors, (2664), 2172 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 2664 transitions. [2020-11-12 03:02:48,680 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 2664 transitions. Word has length 58 [2020-11-12 03:02:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:48,680 INFO L481 AbstractCegarLoop]: Abstraction has 2173 states and 2664 transitions. [2020-11-12 03:02:48,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 2664 transitions. [2020-11-12 03:02:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:48,682 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:48,683 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:02:48,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:48,886 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2090379105, now seen corresponding path program 26 times [2020-11-12 03:02:48,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:48,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37617596] [2020-11-12 03:02:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:49,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37617596] [2020-11-12 03:02:49,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830983719] [2020-11-12 03:02:49,065 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:49,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:49,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:49,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:49,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:49,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:49,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:49,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:49,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246943423] [2020-11-12 03:02:49,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:49,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:49,373 INFO L87 Difference]: Start difference. First operand 2173 states and 2664 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:51,781 INFO L93 Difference]: Finished difference Result 4855 states and 6067 transitions. [2020-11-12 03:02:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-12 03:02:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:51,786 INFO L225 Difference]: With dead ends: 4855 [2020-11-12 03:02:51,786 INFO L226 Difference]: Without dead ends: 4527 [2020-11-12 03:02:51,787 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1175, Invalid=3795, Unknown=0, NotChecked=0, Total=4970 [2020-11-12 03:02:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2020-11-12 03:02:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 2167. [2020-11-12 03:02:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2055 states have (on average 1.2934306569343066) internal successors, (2658), 2166 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 2658 transitions. [2020-11-12 03:02:51,817 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 2658 transitions. Word has length 58 [2020-11-12 03:02:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:51,817 INFO L481 AbstractCegarLoop]: Abstraction has 2167 states and 2658 transitions. [2020-11-12 03:02:51,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 2658 transitions. [2020-11-12 03:02:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:51,820 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:51,820 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:02:52,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-12 03:02:52,031 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1152206433, now seen corresponding path program 27 times [2020-11-12 03:02:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:52,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865714078] [2020-11-12 03:02:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:52,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865714078] [2020-11-12 03:02:52,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749736907] [2020-11-12 03:02:52,237 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:52,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:02:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:52,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:52,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:52,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:52,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:52,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476159100] [2020-11-12 03:02:52,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:52,494 INFO L87 Difference]: Start difference. First operand 2167 states and 2658 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:54,744 INFO L93 Difference]: Finished difference Result 4542 states and 5680 transitions. [2020-11-12 03:02:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-12 03:02:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:54,749 INFO L225 Difference]: With dead ends: 4542 [2020-11-12 03:02:54,749 INFO L226 Difference]: Without dead ends: 4214 [2020-11-12 03:02:54,750 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1281, Invalid=4419, Unknown=0, NotChecked=0, Total=5700 [2020-11-12 03:02:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2020-11-12 03:02:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 2218. [2020-11-12 03:02:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2106 states have (on average 1.2972459639126306) internal successors, (2732), 2217 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 2732 transitions. [2020-11-12 03:02:54,780 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 2732 transitions. Word has length 58 [2020-11-12 03:02:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:54,780 INFO L481 AbstractCegarLoop]: Abstraction has 2218 states and 2732 transitions. [2020-11-12 03:02:54,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 2732 transitions. [2020-11-12 03:02:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:54,783 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:54,783 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:54,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:54,985 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1385632533, now seen corresponding path program 28 times [2020-11-12 03:02:54,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:54,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768319265] [2020-11-12 03:02:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:55,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768319265] [2020-11-12 03:02:55,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483729689] [2020-11-12 03:02:55,148 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:55,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:55,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:55,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:55,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:55,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562053165] [2020-11-12 03:02:55,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:55,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:55,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:55,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:55,454 INFO L87 Difference]: Start difference. First operand 2218 states and 2732 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:56,877 INFO L93 Difference]: Finished difference Result 4159 states and 5135 transitions. [2020-11-12 03:02:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-12 03:02:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:56,898 INFO L225 Difference]: With dead ends: 4159 [2020-11-12 03:02:56,898 INFO L226 Difference]: Without dead ends: 4007 [2020-11-12 03:02:56,899 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=2387, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 03:02:56,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2020-11-12 03:02:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 2167. [2020-11-12 03:02:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2055 states have (on average 1.2939172749391727) internal successors, (2659), 2166 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 2659 transitions. [2020-11-12 03:02:56,928 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 2659 transitions. Word has length 58 [2020-11-12 03:02:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:56,929 INFO L481 AbstractCegarLoop]: Abstraction has 2167 states and 2659 transitions. [2020-11-12 03:02:56,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 2659 transitions. [2020-11-12 03:02:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:56,931 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:56,931 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:57,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-12 03:02:57,132 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1521509101, now seen corresponding path program 29 times [2020-11-12 03:02:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:57,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626175473] [2020-11-12 03:02:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626175473] [2020-11-12 03:02:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81930312] [2020-11-12 03:02:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:57,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:57,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:57,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:57,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:57,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:57,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:57,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:57,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932948119] [2020-11-12 03:02:57,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:57,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:57,563 INFO L87 Difference]: Start difference. First operand 2167 states and 2659 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:59,577 INFO L93 Difference]: Finished difference Result 4352 states and 5450 transitions. [2020-11-12 03:02:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-12 03:02:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:59,583 INFO L225 Difference]: With dead ends: 4352 [2020-11-12 03:02:59,583 INFO L226 Difference]: Without dead ends: 4024 [2020-11-12 03:02:59,584 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1079, Invalid=3613, Unknown=0, NotChecked=0, Total=4692 [2020-11-12 03:02:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4024 states. [2020-11-12 03:02:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4024 to 2165. [2020-11-12 03:02:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2053 states have (on average 1.2951777886020457) internal successors, (2659), 2164 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 2659 transitions. [2020-11-12 03:02:59,614 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 2659 transitions. Word has length 58 [2020-11-12 03:02:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:59,614 INFO L481 AbstractCegarLoop]: Abstraction has 2165 states and 2659 transitions. [2020-11-12 03:02:59,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 2659 transitions. [2020-11-12 03:02:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:59,616 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:59,617 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:59,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-12 03:02:59,817 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash 169000843, now seen corresponding path program 30 times [2020-11-12 03:02:59,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:59,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894948797] [2020-11-12 03:02:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:59,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894948797] [2020-11-12 03:02:59,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545276539] [2020-11-12 03:02:59,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:00,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:03:00,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:00,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:00,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:00,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:00,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841136423] [2020-11-12 03:03:00,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:00,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:00,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:00,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:00,302 INFO L87 Difference]: Start difference. First operand 2165 states and 2659 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:01,568 INFO L93 Difference]: Finished difference Result 4284 states and 5266 transitions. [2020-11-12 03:03:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-12 03:03:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:01,572 INFO L225 Difference]: With dead ends: 4284 [2020-11-12 03:03:01,573 INFO L226 Difference]: Without dead ends: 4132 [2020-11-12 03:03:01,573 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=1829, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:03:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4132 states. [2020-11-12 03:03:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4132 to 2167. [2020-11-12 03:03:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2055 states have (on average 1.2963503649635038) internal successors, (2664), 2166 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 2664 transitions. [2020-11-12 03:03:01,603 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 2664 transitions. Word has length 58 [2020-11-12 03:03:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:01,604 INFO L481 AbstractCegarLoop]: Abstraction has 2167 states and 2664 transitions. [2020-11-12 03:03:01,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 2664 transitions. [2020-11-12 03:03:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:01,607 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:01,607 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:01,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:01,823 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash 790765909, now seen corresponding path program 31 times [2020-11-12 03:03:01,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:01,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106597684] [2020-11-12 03:03:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:02,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106597684] [2020-11-12 03:03:02,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257071695] [2020-11-12 03:03:02,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:02,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:02,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:02,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:02,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:03:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759823646] [2020-11-12 03:03:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:03:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:03:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:03:02,390 INFO L87 Difference]: Start difference. First operand 2167 states and 2664 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:04,656 INFO L93 Difference]: Finished difference Result 4580 states and 5722 transitions. [2020-11-12 03:03:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-12 03:03:04,657 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:04,661 INFO L225 Difference]: With dead ends: 4580 [2020-11-12 03:03:04,661 INFO L226 Difference]: Without dead ends: 4252 [2020-11-12 03:03:04,662 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1093, Invalid=3737, Unknown=0, NotChecked=0, Total=4830 [2020-11-12 03:03:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2020-11-12 03:03:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 2164. [2020-11-12 03:03:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2052 states have (on average 1.2948343079922027) internal successors, (2657), 2163 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 2657 transitions. [2020-11-12 03:03:04,692 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 2657 transitions. Word has length 58 [2020-11-12 03:03:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:04,693 INFO L481 AbstractCegarLoop]: Abstraction has 2164 states and 2657 transitions. [2020-11-12 03:03:04,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 2657 transitions. [2020-11-12 03:03:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:04,695 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:04,695 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:04,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-12 03:03:04,896 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 652143125, now seen corresponding path program 32 times [2020-11-12 03:03:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:04,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226014876] [2020-11-12 03:03:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:05,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226014876] [2020-11-12 03:03:05,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484043362] [2020-11-12 03:03:05,070 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:05,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:03:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:05,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:05,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:05,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:05,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897337579] [2020-11-12 03:03:05,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:05,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:05,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:05,343 INFO L87 Difference]: Start difference. First operand 2164 states and 2657 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:06,004 INFO L93 Difference]: Finished difference Result 3793 states and 4681 transitions. [2020-11-12 03:03:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 03:03:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:06,008 INFO L225 Difference]: With dead ends: 3793 [2020-11-12 03:03:06,008 INFO L226 Difference]: Without dead ends: 3641 [2020-11-12 03:03:06,009 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 03:03:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2020-11-12 03:03:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 2189. [2020-11-12 03:03:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2077 states have (on average 1.294174289841117) internal successors, (2688), 2188 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2688 transitions. [2020-11-12 03:03:06,035 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2688 transitions. Word has length 58 [2020-11-12 03:03:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:06,035 INFO L481 AbstractCegarLoop]: Abstraction has 2189 states and 2688 transitions. [2020-11-12 03:03:06,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2688 transitions. [2020-11-12 03:03:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:06,037 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:06,037 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:06,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:06,239 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1927695613, now seen corresponding path program 33 times [2020-11-12 03:03:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:06,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272587896] [2020-11-12 03:03:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:06,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272587896] [2020-11-12 03:03:06,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674704667] [2020-11-12 03:03:06,420 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:06,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:03:06,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:06,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:06,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:06,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:06,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43814337] [2020-11-12 03:03:06,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:06,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:06,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:06,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:06,725 INFO L87 Difference]: Start difference. First operand 2189 states and 2688 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:07,232 INFO L93 Difference]: Finished difference Result 3538 states and 4360 transitions. [2020-11-12 03:03:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 03:03:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:07,237 INFO L225 Difference]: With dead ends: 3538 [2020-11-12 03:03:07,237 INFO L226 Difference]: Without dead ends: 3386 [2020-11-12 03:03:07,237 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 03:03:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2020-11-12 03:03:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2189. [2020-11-12 03:03:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2077 states have (on average 1.294174289841117) internal successors, (2688), 2188 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2688 transitions. [2020-11-12 03:03:07,262 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2688 transitions. Word has length 58 [2020-11-12 03:03:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:07,262 INFO L481 AbstractCegarLoop]: Abstraction has 2189 states and 2688 transitions. [2020-11-12 03:03:07,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2688 transitions. [2020-11-12 03:03:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:07,264 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:07,264 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:07,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:07,465 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:07,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1620444765, now seen corresponding path program 34 times [2020-11-12 03:03:07,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:07,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878712203] [2020-11-12 03:03:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:07,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878712203] [2020-11-12 03:03:07,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348845178] [2020-11-12 03:03:07,642 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:07,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:07,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:03:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:07,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:07,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:07,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:07,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478744296] [2020-11-12 03:03:07,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:07,965 INFO L87 Difference]: Start difference. First operand 2189 states and 2688 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:08,917 INFO L93 Difference]: Finished difference Result 4114 states and 5068 transitions. [2020-11-12 03:03:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 03:03:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:08,921 INFO L225 Difference]: With dead ends: 4114 [2020-11-12 03:03:08,921 INFO L226 Difference]: Without dead ends: 3962 [2020-11-12 03:03:08,922 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 03:03:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2020-11-12 03:03:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 2164. [2020-11-12 03:03:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2052 states have (on average 1.2948343079922027) internal successors, (2657), 2163 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 2657 transitions. [2020-11-12 03:03:08,955 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 2657 transitions. Word has length 58 [2020-11-12 03:03:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:08,955 INFO L481 AbstractCegarLoop]: Abstraction has 2164 states and 2657 transitions. [2020-11-12 03:03:08,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 2657 transitions. [2020-11-12 03:03:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:08,958 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:08,958 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:09,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-12 03:03:09,173 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:09,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash -998679699, now seen corresponding path program 35 times [2020-11-12 03:03:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:09,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884576758] [2020-11-12 03:03:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:09,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884576758] [2020-11-12 03:03:09,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771829137] [2020-11-12 03:03:09,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:09,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:03:09,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:09,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:09,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:09,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:09,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:03:09,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623264574] [2020-11-12 03:03:09,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:03:09,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:03:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:03:09,620 INFO L87 Difference]: Start difference. First operand 2164 states and 2657 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:11,485 INFO L93 Difference]: Finished difference Result 4784 states and 5962 transitions. [2020-11-12 03:03:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 03:03:11,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:11,490 INFO L225 Difference]: With dead ends: 4784 [2020-11-12 03:03:11,490 INFO L226 Difference]: Without dead ends: 4456 [2020-11-12 03:03:11,490 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=989, Invalid=3301, Unknown=0, NotChecked=0, Total=4290 [2020-11-12 03:03:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2020-11-12 03:03:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 2163. [2020-11-12 03:03:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2051 states have (on average 1.2940029254022427) internal successors, (2654), 2162 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 2654 transitions. [2020-11-12 03:03:11,520 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 2654 transitions. Word has length 58 [2020-11-12 03:03:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:11,520 INFO L481 AbstractCegarLoop]: Abstraction has 2163 states and 2654 transitions. [2020-11-12 03:03:11,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 2654 transitions. [2020-11-12 03:03:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:11,523 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:11,523 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:11,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:11,723 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1151385453, now seen corresponding path program 36 times [2020-11-12 03:03:11,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:11,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606281804] [2020-11-12 03:03:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:11,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606281804] [2020-11-12 03:03:11,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245419288] [2020-11-12 03:03:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:11,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:03:11,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:11,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:12,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:12,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:12,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:12,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218430505] [2020-11-12 03:03:12,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:12,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:12,220 INFO L87 Difference]: Start difference. First operand 2163 states and 2654 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:12,799 INFO L93 Difference]: Finished difference Result 3747 states and 4603 transitions. [2020-11-12 03:03:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 03:03:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:12,803 INFO L225 Difference]: With dead ends: 3747 [2020-11-12 03:03:12,803 INFO L226 Difference]: Without dead ends: 3595 [2020-11-12 03:03:12,804 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=927, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 03:03:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2020-11-12 03:03:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2158. [2020-11-12 03:03:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2046 states have (on average 1.2917888563049853) internal successors, (2643), 2157 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 2643 transitions. [2020-11-12 03:03:12,829 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 2643 transitions. Word has length 58 [2020-11-12 03:03:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:12,829 INFO L481 AbstractCegarLoop]: Abstraction has 2158 states and 2643 transitions. [2020-11-12 03:03:12,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 2643 transitions. [2020-11-12 03:03:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:12,831 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:12,831 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:13,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-12 03:03:13,032 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:13,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1819080995, now seen corresponding path program 37 times [2020-11-12 03:03:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:13,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735010947] [2020-11-12 03:03:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735010947] [2020-11-12 03:03:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575931134] [2020-11-12 03:03:13,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:13,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:13,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:13,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:13,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60545310] [2020-11-12 03:03:13,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:13,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:13,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:13,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:13,503 INFO L87 Difference]: Start difference. First operand 2158 states and 2643 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:14,183 INFO L93 Difference]: Finished difference Result 3828 states and 4686 transitions. [2020-11-12 03:03:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 03:03:14,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:14,188 INFO L225 Difference]: With dead ends: 3828 [2020-11-12 03:03:14,188 INFO L226 Difference]: Without dead ends: 3676 [2020-11-12 03:03:14,189 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1158, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 03:03:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2020-11-12 03:03:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 2153. [2020-11-12 03:03:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2041 states have (on average 1.2895639392454679) internal successors, (2632), 2152 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 2632 transitions. [2020-11-12 03:03:14,218 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 2632 transitions. Word has length 58 [2020-11-12 03:03:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:14,218 INFO L481 AbstractCegarLoop]: Abstraction has 2153 states and 2632 transitions. [2020-11-12 03:03:14,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 2632 transitions. [2020-11-12 03:03:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:14,220 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:14,220 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:14,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-12 03:03:14,421 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash -247134803, now seen corresponding path program 38 times [2020-11-12 03:03:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:14,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636665109] [2020-11-12 03:03:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636665109] [2020-11-12 03:03:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168498005] [2020-11-12 03:03:14,580 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:14,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:03:14,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:14,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:14,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:14,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:14,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:14,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168356580] [2020-11-12 03:03:14,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:14,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:14,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:14,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:14,903 INFO L87 Difference]: Start difference. First operand 2153 states and 2632 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:15,689 INFO L93 Difference]: Finished difference Result 3888 states and 4750 transitions. [2020-11-12 03:03:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:03:15,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:15,693 INFO L225 Difference]: With dead ends: 3888 [2020-11-12 03:03:15,693 INFO L226 Difference]: Without dead ends: 3736 [2020-11-12 03:03:15,694 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 03:03:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2020-11-12 03:03:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 2148. [2020-11-12 03:03:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2148 states, 2036 states have (on average 1.287328094302554) internal successors, (2621), 2147 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 2621 transitions. [2020-11-12 03:03:15,720 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 2621 transitions. Word has length 58 [2020-11-12 03:03:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:15,720 INFO L481 AbstractCegarLoop]: Abstraction has 2148 states and 2621 transitions. [2020-11-12 03:03:15,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 2621 transitions. [2020-11-12 03:03:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:15,723 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:15,723 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:15,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-12 03:03:15,925 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash -111258235, now seen corresponding path program 39 times [2020-11-12 03:03:15,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116047000] [2020-11-12 03:03:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:16,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116047000] [2020-11-12 03:03:16,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655736228] [2020-11-12 03:03:16,111 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:16,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:03:16,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:16,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:16,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:16,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:16,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:16,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:16,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:03:16,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87630251] [2020-11-12 03:03:16,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:03:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:03:16,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:03:16,425 INFO L87 Difference]: Start difference. First operand 2148 states and 2621 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:17,628 INFO L93 Difference]: Finished difference Result 4174 states and 5212 transitions. [2020-11-12 03:03:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 03:03:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:17,632 INFO L225 Difference]: With dead ends: 4174 [2020-11-12 03:03:17,633 INFO L226 Difference]: Without dead ends: 3846 [2020-11-12 03:03:17,633 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:03:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2020-11-12 03:03:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 2147. [2020-11-12 03:03:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2035 states have (on average 1.2864864864864864) internal successors, (2618), 2146 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2618 transitions. [2020-11-12 03:03:17,664 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2618 transitions. Word has length 58 [2020-11-12 03:03:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:17,665 INFO L481 AbstractCegarLoop]: Abstraction has 2147 states and 2618 transitions. [2020-11-12 03:03:17,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2618 transitions. [2020-11-12 03:03:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:17,667 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:17,668 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:17,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-12 03:03:17,883 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1202505116, now seen corresponding path program 9 times [2020-11-12 03:03:17,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:17,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071986341] [2020-11-12 03:03:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:18,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071986341] [2020-11-12 03:03:18,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512718714] [2020-11-12 03:03:18,091 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:18,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 03:03:18,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 03:03:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:18,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:18,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:18,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2020-11-12 03:03:18,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814206664] [2020-11-12 03:03:18,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:03:18,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:18,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:03:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:03:18,225 INFO L87 Difference]: Start difference. First operand 2147 states and 2618 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:18,560 INFO L93 Difference]: Finished difference Result 3395 states and 4140 transitions. [2020-11-12 03:03:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 03:03:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 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 63 [2020-11-12 03:03:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:18,564 INFO L225 Difference]: With dead ends: 3395 [2020-11-12 03:03:18,564 INFO L226 Difference]: Without dead ends: 3243 [2020-11-12 03:03:18,564 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-11-12 03:03:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2020-11-12 03:03:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2206. [2020-11-12 03:03:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2094 states have (on average 1.285577841451767) internal successors, (2692), 2205 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 2692 transitions. [2020-11-12 03:03:18,589 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 2692 transitions. Word has length 63 [2020-11-12 03:03:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:18,590 INFO L481 AbstractCegarLoop]: Abstraction has 2206 states and 2692 transitions. [2020-11-12 03:03:18,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 2692 transitions. [2020-11-12 03:03:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:18,591 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:18,591 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:18,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:18,792 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash -380891116, now seen corresponding path program 10 times [2020-11-12 03:03:18,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:18,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161610230] [2020-11-12 03:03:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:18,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161610230] [2020-11-12 03:03:18,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720443619] [2020-11-12 03:03:18,997 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:19,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:19,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:19,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:19,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:19,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:19,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:19,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647382883] [2020-11-12 03:03:19,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:19,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:19,397 INFO L87 Difference]: Start difference. First operand 2206 states and 2692 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:20,590 INFO L93 Difference]: Finished difference Result 4519 states and 5728 transitions. [2020-11-12 03:03:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 03:03:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:03:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:20,594 INFO L225 Difference]: With dead ends: 4519 [2020-11-12 03:03:20,594 INFO L226 Difference]: Without dead ends: 4015 [2020-11-12 03:03:20,595 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:03:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2020-11-12 03:03:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 2172. [2020-11-12 03:03:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2060 states have (on average 1.2883495145631068) internal successors, (2654), 2171 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 2654 transitions. [2020-11-12 03:03:20,623 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 2654 transitions. Word has length 63 [2020-11-12 03:03:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:20,623 INFO L481 AbstractCegarLoop]: Abstraction has 2172 states and 2654 transitions. [2020-11-12 03:03:20,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 2654 transitions. [2020-11-12 03:03:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:20,625 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:20,625 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 03:03:20,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:20,825 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:20,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:20,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1660723240, now seen corresponding path program 40 times [2020-11-12 03:03:20,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:20,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288028027] [2020-11-12 03:03:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288028027] [2020-11-12 03:03:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570945915] [2020-11-12 03:03:21,030 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:21,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:21,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:21,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:21,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:21,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:21,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:21,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:21,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:21,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270290337] [2020-11-12 03:03:21,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:21,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:21,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:21,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:21,465 INFO L87 Difference]: Start difference. First operand 2172 states and 2654 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:22,370 INFO L93 Difference]: Finished difference Result 3898 states and 4769 transitions. [2020-11-12 03:03:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 03:03:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:03:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:22,375 INFO L225 Difference]: With dead ends: 3898 [2020-11-12 03:03:22,375 INFO L226 Difference]: Without dead ends: 3746 [2020-11-12 03:03:22,375 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 03:03:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2020-11-12 03:03:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 2172. [2020-11-12 03:03:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2060 states have (on average 1.2883495145631068) internal successors, (2654), 2171 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 2654 transitions. [2020-11-12 03:03:22,405 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 2654 transitions. Word has length 63 [2020-11-12 03:03:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:22,405 INFO L481 AbstractCegarLoop]: Abstraction has 2172 states and 2654 transitions. [2020-11-12 03:03:22,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 2654 transitions. [2020-11-12 03:03:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:22,407 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:22,408 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 03:03:22,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:22,622 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash -457503288, now seen corresponding path program 41 times [2020-11-12 03:03:22,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:22,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898712366] [2020-11-12 03:03:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:22,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898712366] [2020-11-12 03:03:22,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504864473] [2020-11-12 03:03:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:22,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 03:03:22,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:22,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:22,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:23,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:23,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:23,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739646751] [2020-11-12 03:03:23,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:23,259 INFO L87 Difference]: Start difference. First operand 2172 states and 2654 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:25,331 INFO L93 Difference]: Finished difference Result 4829 states and 6130 transitions. [2020-11-12 03:03:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-12 03:03:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:03:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:25,336 INFO L225 Difference]: With dead ends: 4829 [2020-11-12 03:03:25,337 INFO L226 Difference]: Without dead ends: 4325 [2020-11-12 03:03:25,337 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=786, Invalid=2996, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 03:03:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2020-11-12 03:03:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 2187. [2020-11-12 03:03:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2075 states have (on average 1.2891566265060241) internal successors, (2675), 2186 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 2675 transitions. [2020-11-12 03:03:25,373 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 2675 transitions. Word has length 63 [2020-11-12 03:03:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:25,373 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 2675 transitions. [2020-11-12 03:03:25,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 2675 transitions. [2020-11-12 03:03:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:25,376 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:25,376 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:25,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-12 03:03:25,577 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash 85740146, now seen corresponding path program 42 times [2020-11-12 03:03:25,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:25,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553511970] [2020-11-12 03:03:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:25,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553511970] [2020-11-12 03:03:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147342064] [2020-11-12 03:03:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:25,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:03:25,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:26,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:26,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:26,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320355119] [2020-11-12 03:03:26,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:26,269 INFO L87 Difference]: Start difference. First operand 2187 states and 2675 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:27,508 INFO L93 Difference]: Finished difference Result 4107 states and 5036 transitions. [2020-11-12 03:03:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 03:03:27,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:03:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:27,513 INFO L225 Difference]: With dead ends: 4107 [2020-11-12 03:03:27,513 INFO L226 Difference]: Without dead ends: 3955 [2020-11-12 03:03:27,514 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=453, Invalid=1527, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 03:03:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2020-11-12 03:03:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 2197. [2020-11-12 03:03:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2085 states have (on average 1.2877697841726619) internal successors, (2685), 2196 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 2685 transitions. [2020-11-12 03:03:27,542 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 2685 transitions. Word has length 63 [2020-11-12 03:03:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:27,542 INFO L481 AbstractCegarLoop]: Abstraction has 2197 states and 2685 transitions. [2020-11-12 03:03:27,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 2685 transitions. [2020-11-12 03:03:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:27,544 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:27,544 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:27,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:27,745 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1578009826, now seen corresponding path program 43 times [2020-11-12 03:03:27,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:27,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35506818] [2020-11-12 03:03:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:27,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35506818] [2020-11-12 03:03:27,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082291726] [2020-11-12 03:03:27,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:28,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:28,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:28,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:28,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:28,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:28,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:28,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594692117] [2020-11-12 03:03:28,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:28,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:28,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:28,451 INFO L87 Difference]: Start difference. First operand 2197 states and 2685 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:31,439 INFO L93 Difference]: Finished difference Result 5325 states and 6738 transitions. [2020-11-12 03:03:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-12 03:03:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:03:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:31,445 INFO L225 Difference]: With dead ends: 5325 [2020-11-12 03:03:31,445 INFO L226 Difference]: Without dead ends: 4821 [2020-11-12 03:03:31,446 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1124, Invalid=4132, Unknown=0, NotChecked=0, Total=5256 [2020-11-12 03:03:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2020-11-12 03:03:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 2227. [2020-11-12 03:03:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2115 states have (on average 1.293144208037825) internal successors, (2735), 2226 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2735 transitions. [2020-11-12 03:03:31,477 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2735 transitions. Word has length 63 [2020-11-12 03:03:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:31,478 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 2735 transitions. [2020-11-12 03:03:31,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2735 transitions. [2020-11-12 03:03:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:31,479 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:31,479 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:03:31,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-12 03:03:31,680 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1282056670, now seen corresponding path program 44 times [2020-11-12 03:03:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:31,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051857285] [2020-11-12 03:03:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051857285] [2020-11-12 03:03:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355277211] [2020-11-12 03:03:31,902 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:31,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:03:31,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:32,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:32,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:32,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:32,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:32,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:32,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:32,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210837890] [2020-11-12 03:03:32,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:32,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:32,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:32,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:32,607 INFO L87 Difference]: Start difference. First operand 2227 states and 2735 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:33,765 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 24 [2020-11-12 03:03:38,514 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-12 03:03:55,657 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-11-12 03:04:01,617 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 58 DAG size of output: 22 [2020-11-12 03:04:05,932 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-11-12 03:04:49,896 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2020-11-12 03:05:25,217 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-12 03:05:45,169 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-12 03:06:14,228 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 52 [2020-11-12 03:07:58,740 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-11-12 03:08:27,040 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 49 [2020-11-12 03:10:25,128 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-12 03:11:16,754 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-12 03:11:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:11:31,531 INFO L93 Difference]: Finished difference Result 6487 states and 8161 transitions. [2020-11-12 03:11:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-12 03:11:31,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:11:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:11:31,546 INFO L225 Difference]: With dead ends: 6487 [2020-11-12 03:11:31,546 INFO L226 Difference]: Without dead ends: 5919 [2020-11-12 03:11:31,549 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 175.5s TimeCoverageRelationStatistics Valid=1295, Invalid=5128, Unknown=57, NotChecked=0, Total=6480 [2020-11-12 03:11:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2020-11-12 03:11:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 2419. [2020-11-12 03:11:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2307 states have (on average 1.3008235804074555) internal successors, (3001), 2418 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3001 transitions. [2020-11-12 03:11:31,596 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3001 transitions. Word has length 63 [2020-11-12 03:11:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:11:31,596 INFO L481 AbstractCegarLoop]: Abstraction has 2419 states and 3001 transitions. [2020-11-12 03:11:31,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3001 transitions. [2020-11-12 03:11:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:11:31,598 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:11:31,598 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:11:31,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:11:31,799 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:11:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:11:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash 428580378, now seen corresponding path program 45 times [2020-11-12 03:11:31,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:11:31,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431141176] [2020-11-12 03:11:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:11:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:11:32,191 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2020-11-12 03:11:32,691 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2020-11-12 03:11:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:11:32,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431141176] [2020-11-12 03:11:32,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849918279] [2020-11-12 03:11:32,797 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:11:32,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:11:32,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:11:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:11:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:11:34,176 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-11-12 03:11:34,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:34,540 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-11-12 03:11:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:11:34,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:11:34,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:11:34,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588965750] [2020-11-12 03:11:34,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:11:34,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:11:34,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:11:34,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:11:34,601 INFO L87 Difference]: Start difference. First operand 2419 states and 3001 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:35,206 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2020-11-12 03:11:35,436 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2020-11-12 03:11:35,783 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-11-12 03:11:36,027 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-11-12 03:11:36,294 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-11-12 03:11:36,543 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-11-12 03:11:36,802 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-12 03:11:37,076 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-11-12 03:11:37,469 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2020-11-12 03:11:37,855 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-11-12 03:11:38,189 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2020-11-12 03:11:38,438 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-11-12 03:11:38,735 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-11-12 03:11:39,406 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-11-12 03:11:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:11:41,197 INFO L93 Difference]: Finished difference Result 4543 states and 5622 transitions. [2020-11-12 03:11:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 03:11:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:11:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:11:41,210 INFO L225 Difference]: With dead ends: 4543 [2020-11-12 03:11:41,210 INFO L226 Difference]: Without dead ends: 4391 [2020-11-12 03:11:41,210 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=519, Invalid=1643, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:11:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2020-11-12 03:11:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 2449. [2020-11-12 03:11:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 2337 states have (on average 1.302096705177578) internal successors, (3043), 2448 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3043 transitions. [2020-11-12 03:11:41,247 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3043 transitions. Word has length 63 [2020-11-12 03:11:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:11:41,247 INFO L481 AbstractCegarLoop]: Abstraction has 2449 states and 3043 transitions. [2020-11-12 03:11:41,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3043 transitions. [2020-11-12 03:11:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:11:41,250 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:11:41,250 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:11:41,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-12 03:11:41,454 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:11:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:11:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash -286191092, now seen corresponding path program 46 times [2020-11-12 03:11:41,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:11:41,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866201750] [2020-11-12 03:11:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:11:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:11:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:11:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866201750] [2020-11-12 03:11:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248014452] [2020-11-12 03:11:42,199 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:11:42,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:11:42,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:11:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:11:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:11:43,301 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2020-11-12 03:11:43,596 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2020-11-12 03:11:43,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:43,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:43,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:11:43,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:11:43,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:11:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902237032] [2020-11-12 03:11:43,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:11:43,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:11:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:11:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:11:43,926 INFO L87 Difference]: Start difference. First operand 2449 states and 3043 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:44,752 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-11-12 03:11:45,118 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-11-12 03:11:45,347 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-11-12 03:11:45,622 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2020-11-12 03:11:45,838 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-11-12 03:11:46,360 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-11-12 03:11:46,661 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-11-12 03:11:46,964 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2020-11-12 03:11:47,235 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-11-12 03:11:48,046 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-11-12 03:11:48,319 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2020-11-12 03:11:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:11:49,972 INFO L93 Difference]: Finished difference Result 4293 states and 5332 transitions. [2020-11-12 03:11:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 03:11:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:11:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:11:49,984 INFO L225 Difference]: With dead ends: 4293 [2020-11-12 03:11:49,984 INFO L226 Difference]: Without dead ends: 4141 [2020-11-12 03:11:49,984 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:11:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2020-11-12 03:11:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 2444. [2020-11-12 03:11:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2332 states have (on average 1.300171526586621) internal successors, (3032), 2443 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 3032 transitions. [2020-11-12 03:11:50,028 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 3032 transitions. Word has length 63 [2020-11-12 03:11:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:11:50,028 INFO L481 AbstractCegarLoop]: Abstraction has 2444 states and 3032 transitions. [2020-11-12 03:11:50,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 3032 transitions. [2020-11-12 03:11:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:11:50,031 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:11:50,031 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:11:50,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:11:50,232 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:11:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:11:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash -39096824, now seen corresponding path program 47 times [2020-11-12 03:11:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:11:50,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595425353] [2020-11-12 03:11:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:11:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:11:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:11:51,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595425353] [2020-11-12 03:11:51,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608516694] [2020-11-12 03:11:51,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:11:51,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:11:51,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:11:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:11:51,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:11:52,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:52,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:52,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:52,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:11:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:11:52,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:11:52,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:11:52,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515397492] [2020-11-12 03:11:52,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:11:52,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:11:52,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:11:52,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:11:52,630 INFO L87 Difference]: Start difference. First operand 2444 states and 3032 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:11:53,166 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2020-11-12 03:11:53,330 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2020-11-12 03:11:53,608 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2020-11-12 03:11:53,850 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2020-11-12 03:11:54,091 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-11-12 03:11:54,372 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2020-11-12 03:11:54,672 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-12 03:11:54,850 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-11-12 03:11:55,117 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-11-12 03:11:55,433 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-11-12 03:11:55,718 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2020-11-12 03:11:55,979 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 15 [2020-11-12 03:11:56,763 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-11-12 03:11:57,022 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-11-12 03:11:57,277 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2020-11-12 03:11:57,637 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2020-11-12 03:11:57,960 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2020-11-12 03:11:58,597 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-11-12 03:11:59,223 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-11-12 03:11:59,912 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-11-12 03:12:00,223 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-11-12 03:12:00,544 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 18 [2020-11-12 03:12:00,882 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-11-12 03:12:01,452 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-11-12 03:12:02,192 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2020-11-12 03:12:02,498 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 16 [2020-11-12 03:12:02,827 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-11-12 03:12:03,092 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2020-11-12 03:12:03,359 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2020-11-12 03:12:04,011 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2020-11-12 03:12:04,302 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-11-12 03:12:04,566 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-11-12 03:12:04,998 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-11-12 03:12:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:06,019 INFO L93 Difference]: Finished difference Result 5643 states and 7184 transitions. [2020-11-12 03:12:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-12 03:12:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:12:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:06,033 INFO L225 Difference]: With dead ends: 5643 [2020-11-12 03:12:06,033 INFO L226 Difference]: Without dead ends: 5139 [2020-11-12 03:12:06,034 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1267, Invalid=4585, Unknown=0, NotChecked=0, Total=5852 [2020-11-12 03:12:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2020-11-12 03:12:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 2429. [2020-11-12 03:12:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2317 states have (on average 1.3047043590850238) internal successors, (3023), 2428 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3023 transitions. [2020-11-12 03:12:06,079 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3023 transitions. Word has length 63 [2020-11-12 03:12:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:06,079 INFO L481 AbstractCegarLoop]: Abstraction has 2429 states and 3023 transitions. [2020-11-12 03:12:06,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3023 transitions. [2020-11-12 03:12:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:06,082 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:06,082 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:12:06,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-12 03:12:06,283 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:06,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1395803976, now seen corresponding path program 48 times [2020-11-12 03:12:06,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:06,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603047841] [2020-11-12 03:12:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:07,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603047841] [2020-11-12 03:12:07,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307032204] [2020-11-12 03:12:07,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:12:07,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:12:07,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:08,348 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2020-11-12 03:12:08,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:12:08,788 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-11-12 03:12:08,939 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-11-12 03:12:09,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:09,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:09,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:09,292 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-11-12 03:12:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:09,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:09,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:09,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336881852] [2020-11-12 03:12:09,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:09,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:09,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:09,382 INFO L87 Difference]: Start difference. First operand 2429 states and 3023 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:09,918 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-11-12 03:12:10,098 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2020-11-12 03:12:10,376 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2020-11-12 03:12:10,586 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 13 [2020-11-12 03:12:10,852 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-11-12 03:12:11,263 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-11-12 03:12:11,444 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-11-12 03:12:11,783 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2020-11-12 03:12:12,096 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 18 [2020-11-12 03:12:12,323 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-11-12 03:12:12,652 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-11-12 03:12:13,086 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2020-11-12 03:12:13,742 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2020-11-12 03:12:14,241 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-11-12 03:12:15,109 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-11-12 03:12:15,501 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 21 [2020-11-12 03:12:15,894 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2020-11-12 03:12:16,218 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-11-12 03:12:16,971 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-11-12 03:12:17,377 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-11-12 03:12:17,941 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-11-12 03:12:18,503 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-11-12 03:12:18,790 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-11-12 03:12:19,269 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-11-12 03:12:19,599 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-11-12 03:12:20,342 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-11-12 03:12:20,874 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2020-11-12 03:12:21,182 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 15 [2020-11-12 03:12:21,730 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-11-12 03:12:22,072 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-11-12 03:12:22,561 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-11-12 03:12:23,083 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-11-12 03:12:23,554 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-11-12 03:12:23,959 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-11-12 03:12:24,538 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2020-11-12 03:12:24,853 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 18 [2020-11-12 03:12:26,235 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-11-12 03:12:26,581 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-12 03:12:27,063 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-11-12 03:12:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:27,976 INFO L93 Difference]: Finished difference Result 5844 states and 7404 transitions. [2020-11-12 03:12:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-12 03:12:27,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:12:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:27,989 INFO L225 Difference]: With dead ends: 5844 [2020-11-12 03:12:27,990 INFO L226 Difference]: Without dead ends: 5340 [2020-11-12 03:12:27,991 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1434, Invalid=5208, Unknown=0, NotChecked=0, Total=6642 [2020-11-12 03:12:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2020-11-12 03:12:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 2244. [2020-11-12 03:12:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2132 states have (on average 1.3053470919324577) internal successors, (2783), 2243 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2783 transitions. [2020-11-12 03:12:28,031 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2783 transitions. Word has length 63 [2020-11-12 03:12:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:28,031 INFO L481 AbstractCegarLoop]: Abstraction has 2244 states and 2783 transitions. [2020-11-12 03:12:28,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2783 transitions. [2020-11-12 03:12:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:28,032 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:28,033 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:12:28,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-11-12 03:12:28,234 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash 576848318, now seen corresponding path program 49 times [2020-11-12 03:12:28,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:28,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427699314] [2020-11-12 03:12:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427699314] [2020-11-12 03:12:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972050695] [2020-11-12 03:12:29,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:12:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:29,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:30,289 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-11-12 03:12:30,525 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2020-11-12 03:12:30,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:30,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:30,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:30,893 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-11-12 03:12:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:30,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:30,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:30,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938907215] [2020-11-12 03:12:30,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:30,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:30,946 INFO L87 Difference]: Start difference. First operand 2244 states and 2783 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:31,687 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 12 [2020-11-12 03:12:31,997 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 16 [2020-11-12 03:12:32,834 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2020-11-12 03:12:33,139 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2020-11-12 03:12:33,569 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-11-12 03:12:33,994 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2020-11-12 03:12:34,312 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2020-11-12 03:12:34,599 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-11-12 03:12:34,955 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-11-12 03:12:35,552 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-11-12 03:12:35,880 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-11-12 03:12:36,187 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-11-12 03:12:36,629 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2020-11-12 03:12:36,957 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2020-11-12 03:12:37,767 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-11-12 03:12:38,053 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-11-12 03:12:38,715 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-12 03:12:39,014 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2020-11-12 03:12:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:41,107 INFO L93 Difference]: Finished difference Result 4378 states and 5414 transitions. [2020-11-12 03:12:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-12 03:12:41,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 63 [2020-11-12 03:12:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:41,121 INFO L225 Difference]: With dead ends: 4378 [2020-11-12 03:12:41,121 INFO L226 Difference]: Without dead ends: 4226 [2020-11-12 03:12:41,122 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=781, Invalid=2759, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 03:12:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2020-11-12 03:12:41,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 2260. [2020-11-12 03:12:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2148 states have (on average 1.3105214152700186) internal successors, (2815), 2259 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2815 transitions. [2020-11-12 03:12:41,162 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2815 transitions. Word has length 63 [2020-11-12 03:12:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:41,162 INFO L481 AbstractCegarLoop]: Abstraction has 2260 states and 2815 transitions. [2020-11-12 03:12:41,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2815 transitions. [2020-11-12 03:12:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:41,164 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:41,164 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 03:12:41,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:12:41,367 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 712724886, now seen corresponding path program 50 times [2020-11-12 03:12:41,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:41,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563754271] [2020-11-12 03:12:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:42,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563754271] [2020-11-12 03:12:42,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726247434] [2020-11-12 03:12:42,225 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:12:42,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:12:42,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:42,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:43,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:12:43,950 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-11-12 03:12:48,147 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 22 [2020-11-12 03:12:48,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:48,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:48,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:48,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667243990] [2020-11-12 03:12:48,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:48,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2020-11-12 03:12:48,170 INFO L87 Difference]: Start difference. First operand 2260 states and 2815 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:48,778 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 12 [2020-11-12 03:12:49,061 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 16 [2020-11-12 03:12:49,497 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-11-12 03:12:49,898 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-11-12 03:12:50,091 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2020-11-12 03:12:54,449 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-12 03:12:54,855 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 19 [2020-11-12 03:12:55,105 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2020-11-12 03:12:55,400 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-11-12 03:12:55,788 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-11-12 03:12:56,082 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-11-12 03:13:00,685 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-12 03:13:02,985 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 03:13:13,507 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-11-12 03:13:20,063 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-11-12 03:13:24,637 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-11-12 03:13:25,135 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2020-11-12 03:13:41,679 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2020-11-12 03:13:56,139 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-11-12 03:14:02,515 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-11-12 03:14:02,943 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-11-12 03:14:09,488 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-11-12 03:14:18,073 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-12 03:14:22,385 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-11-12 03:14:35,191 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-12 03:14:43,540 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 03:14:51,900 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-11-12 03:14:56,275 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-11-12 03:15:03,292 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-11-12 03:15:03,823 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-11-12 03:15:40,659 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 Received shutdown request... [2020-11-12 03:16:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 03:16:01,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:16:01,069 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-12 03:16:01,075 WARN L250 ceAbstractionStarter]: Timeout [2020-11-12 03:16:01,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 03:16:01 BasicIcfg [2020-11-12 03:16:01,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 03:16:01,077 INFO L168 Benchmark]: Toolchain (without parser) took 855882.49 ms. Allocated memory was 302.0 MB in the beginning and 828.4 MB in the end (delta: 526.4 MB). Free memory was 277.3 MB in the beginning and 617.6 MB in the end (delta: -340.3 MB). Peak memory consumption was 187.6 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:01,077 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 302.0 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 03:16:01,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.59 ms. Allocated memory is still 302.0 MB. Free memory was 276.7 MB in the beginning and 248.0 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:01,078 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.89 ms. Allocated memory is still 302.0 MB. Free memory was 247.7 MB in the beginning and 246.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:01,078 INFO L168 Benchmark]: Boogie Preprocessor took 31.99 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:01,079 INFO L168 Benchmark]: RCFGBuilder took 533.78 ms. Allocated memory is still 302.0 MB. Free memory was 244.6 MB in the beginning and 264.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:01,079 INFO L168 Benchmark]: TraceAbstraction took 854553.13 ms. Allocated memory was 302.0 MB in the beginning and 828.4 MB in the end (delta: 526.4 MB). Free memory was 264.8 MB in the beginning and 617.6 MB in the end (delta: -352.8 MB). Peak memory consumption was 172.5 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:01,081 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 302.0 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 695.59 ms. Allocated memory is still 302.0 MB. Free memory was 276.7 MB in the beginning and 248.0 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 54.89 ms. Allocated memory is still 302.0 MB. Free memory was 247.7 MB in the beginning and 246.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.99 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 533.78 ms. Allocated memory is still 302.0 MB. Free memory was 244.6 MB in the beginning and 264.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 854553.13 ms. Allocated memory was 302.0 MB in the beginning and 828.4 MB in the end (delta: 526.4 MB). Free memory was 264.8 MB in the beginning and 617.6 MB in the end (delta: -352.8 MB). Peak memory consumption was 172.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (2260states) and FLOYD_HOARE automaton (currently 45 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (1227 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 854.4s, OverallIterations: 73, TraceHistogramMax: 6, AutomataDifference: 787.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 5644 SDtfs, 48312 SDslu, 65762 SDs, 0 SdLazy, 11744 SolverSat, 4595 SolverUnsat, 207 SolverUnknown, 0 SolverNotchecked, 429.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6217 GetRequests, 3254 SyntacticMatches, 31 SemanticMatches, 2932 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44042 ImplicationChecksByTransitivity, 375.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2449occurred in iteration=68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 72 MinimizatonAttempts, 99288 StatesRemovedByMinimization, 72 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 43.7s InterpolantComputationTime, 7650 NumberOfCodeBlocks, 7650 NumberOfCodeBlocksAsserted, 245 NumberOfCheckSat, 7510 ConstructedInterpolants, 5 QuantifiedInterpolants, 3315754 SizeOfPredicates, 274 NumberOfNonLiveVariables, 9107 ConjunctsInSsa, 860 ConjunctsInUnsatCore, 140 InterpolantComputations, 6 PerfectInterpolantSequences, 0/2742 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown