/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 09:20:34,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 09:20:34,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 09:20:34,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 09:20:34,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 09:20:34,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 09:20:34,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 09:20:34,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 09:20:34,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 09:20:34,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 09:20:34,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 09:20:34,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 09:20:34,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 09:20:34,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 09:20:34,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 09:20:34,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 09:20:34,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 09:20:34,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 09:20:34,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 09:20:34,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 09:20:34,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 09:20:34,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 09:20:34,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 09:20:34,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 09:20:34,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-12 09:20:34,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-12 09:20:34,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-12 09:20:34,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-12 09:20:34,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-12 09:20:34,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-12 09:20:34,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 09:20:34,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 09:20:34,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 09:20:34,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 09:20:34,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 09:20:34,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 09:20:34,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 09:20:34,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 09:20:34,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 09:20:34,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 09:20:34,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 09:20:34,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf [2020-11-12 09:20:34,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 09:20:34,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 09:20:34,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 09:20:34,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 09:20:34,395 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 09:20:34,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 09:20:34,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 09:20:34,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 09:20:34,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 09:20:34,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 09:20:34,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 09:20:34,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 09:20:34,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 09:20:34,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 09:20:34,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 09:20:34,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 09:20:34,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 09:20:34,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 09:20:34,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 09:20:34,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 09:20:34,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 09:20:34,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 09:20:34,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 09:20:34,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 09:20:34,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 09:20:34,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 09:20:34,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 09:20:34,401 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 09:20:34,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 09:20:34,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 09:20:34,402 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=NEW_STATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 09:20:34,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 09:20:34,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 09:20:34,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 09:20:34,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 09:20:34,900 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 09:20:34,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-11-12 09:20:35,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d1bda4e/03c56fedaf1e4f6ca354284391fba98b/FLAG653ec0cf0 [2020-11-12 09:20:35,792 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 09:20:35,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-11-12 09:20:35,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d1bda4e/03c56fedaf1e4f6ca354284391fba98b/FLAG653ec0cf0 [2020-11-12 09:20:36,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d1bda4e/03c56fedaf1e4f6ca354284391fba98b [2020-11-12 09:20:36,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 09:20:36,033 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 09:20:36,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 09:20:36,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 09:20:36,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 09:20:36,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc627cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36, skipping insertion in model container [2020-11-12 09:20:36,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 09:20:36,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 09:20:36,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:20:36,461 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 09:20:36,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:20:36,676 INFO L208 MainTranslator]: Completed translation [2020-11-12 09:20:36,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36 WrapperNode [2020-11-12 09:20:36,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 09:20:36,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 09:20:36,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 09:20:36,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 09:20:36,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 09:20:36,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 09:20:36,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 09:20:36,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 09:20:36,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (1/1) ... [2020-11-12 09:20:36,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 09:20:36,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 09:20:36,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 09:20:36,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 09:20:36,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (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 09:20:36,848 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-12 09:20:36,848 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-12 09:20:36,849 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-12 09:20:36,849 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-12 09:20:36,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 09:20:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 09:20:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 09:20:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 09:20:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 09:20:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 09:20:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 09:20:36,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 09:20:36,852 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 09:20:37,251 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 09:20:37,251 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-12 09:20:37,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:20:37 BoogieIcfgContainer [2020-11-12 09:20:37,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 09:20:37,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 09:20:37,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 09:20:37,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 09:20:37,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 09:20:36" (1/3) ... [2020-11-12 09:20:37,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfd0056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:20:37, skipping insertion in model container [2020-11-12 09:20:37,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:36" (2/3) ... [2020-11-12 09:20:37,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfd0056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:20:37, skipping insertion in model container [2020-11-12 09:20:37,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:20:37" (3/3) ... [2020-11-12 09:20:37,263 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-11-12 09:20:37,279 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 09:20:37,280 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 09:20:37,283 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 09:20:37,284 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 09:20:37,315 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,316 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,316 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,318 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,318 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,318 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,318 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,319 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,319 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,319 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,319 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,319 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,320 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,320 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,320 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,320 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,321 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,321 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,321 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,321 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,322 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,322 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,322 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,323 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,323 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,323 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,323 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,323 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,324 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,324 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,324 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,324 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,325 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,325 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,325 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,325 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,326 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,326 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,326 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,326 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,326 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,327 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,327 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,327 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,328 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,328 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,329 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,329 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,329 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,332 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,342 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,343 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,343 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:37,346 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 09:20:37,363 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-12 09:20:37,407 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 09:20:37,407 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 09:20:37,407 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 09:20:37,407 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 09:20:37,407 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 09:20:37,408 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 09:20:37,409 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 09:20:37,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 09:20:37,428 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-11-12 09:20:37,659 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 09:20:37,997 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 334ms [2020-11-12 09:20:38,006 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 09:20:38,021 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 7077 states, 6237 states have (on average 1.1925605258938592) internal successors, (7438), 7076 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 7077 states, 6237 states have (on average 1.1925605258938592) internal successors, (7438), 7076 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-12 09:20:38,054 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:38,055 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 09:20:38,056 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash 792846013, now seen corresponding path program 1 times [2020-11-12 09:20:38,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:38,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652437113] [2020-11-12 09:20:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:38,654 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 09:20:38,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652437113] [2020-11-12 09:20:38,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:38,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 09:20:38,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318902081] [2020-11-12 09:20:38,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 09:20:38,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 09:20:38,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 09:20:38,704 INFO L87 Difference]: Start difference. First operand has 7077 states, 6237 states have (on average 1.1925605258938592) internal successors, (7438), 7076 states have internal predecessors, (7438), 0 states have call successors, (0), 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 09:20:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:38,902 INFO L93 Difference]: Finished difference Result 4190 states and 4731 transitions. [2020-11-12 09:20:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 09:20:38,904 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 09:20:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:38,929 INFO L225 Difference]: With dead ends: 4190 [2020-11-12 09:20:38,929 INFO L226 Difference]: Without dead ends: 1233 [2020-11-12 09:20:38,931 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 09:20:38,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2020-11-12 09:20:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 923. [2020-11-12 09:20:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 811 states have (on average 1.3329223181257706) internal successors, (1081), 922 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1081 transitions. [2020-11-12 09:20:39,048 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1081 transitions. Word has length 28 [2020-11-12 09:20:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:39,049 INFO L481 AbstractCegarLoop]: Abstraction has 923 states and 1081 transitions. [2020-11-12 09:20:39,049 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 09:20:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1081 transitions. [2020-11-12 09:20:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 09:20:39,051 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:39,052 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 09:20:39,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 09:20:39,052 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1893217839, now seen corresponding path program 1 times [2020-11-12 09:20:39,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:39,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864750406] [2020-11-12 09:20:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:39,222 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 09:20:39,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864750406] [2020-11-12 09:20:39,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:39,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:20:39,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681600382] [2020-11-12 09:20:39,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:20:39,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:20:39,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:20:39,227 INFO L87 Difference]: Start difference. First operand 923 states and 1081 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 09:20:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:39,386 INFO L93 Difference]: Finished difference Result 1634 states and 1886 transitions. [2020-11-12 09:20:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 09:20:39,386 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 09:20:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:39,395 INFO L225 Difference]: With dead ends: 1634 [2020-11-12 09:20:39,395 INFO L226 Difference]: Without dead ends: 1388 [2020-11-12 09:20:39,396 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 09:20:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2020-11-12 09:20:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 943. [2020-11-12 09:20:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 831 states have (on average 1.332129963898917) internal successors, (1107), 942 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1107 transitions. [2020-11-12 09:20:39,430 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1107 transitions. Word has length 33 [2020-11-12 09:20:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:39,430 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 1107 transitions. [2020-11-12 09:20:39,430 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 09:20:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1107 transitions. [2020-11-12 09:20:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 09:20:39,432 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:39,432 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 09:20:39,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 09:20:39,433 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash -11030355, now seen corresponding path program 1 times [2020-11-12 09:20:39,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:39,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790476247] [2020-11-12 09:20:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:39,551 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 09:20:39,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790476247] [2020-11-12 09:20:39,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:39,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:20:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537935498] [2020-11-12 09:20:39,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:20:39,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:20:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:20:39,555 INFO L87 Difference]: Start difference. First operand 943 states and 1107 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 09:20:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:39,659 INFO L93 Difference]: Finished difference Result 1700 states and 1953 transitions. [2020-11-12 09:20:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 09:20:39,660 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 09:20:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:39,668 INFO L225 Difference]: With dead ends: 1700 [2020-11-12 09:20:39,668 INFO L226 Difference]: Without dead ends: 1390 [2020-11-12 09:20:39,669 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-12 09:20:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2020-11-12 09:20:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1033. [2020-11-12 09:20:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 921 states have (on average 1.3127035830618892) internal successors, (1209), 1032 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 09:20:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1209 transitions. [2020-11-12 09:20:39,704 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1209 transitions. Word has length 33 [2020-11-12 09:20:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:39,705 INFO L481 AbstractCegarLoop]: Abstraction has 1033 states and 1209 transitions. [2020-11-12 09:20:39,705 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 09:20:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1209 transitions. [2020-11-12 09:20:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 09:20:39,707 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:39,707 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 09:20:39,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 09:20:39,708 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:39,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1900462950, now seen corresponding path program 1 times [2020-11-12 09:20:39,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:39,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180995665] [2020-11-12 09:20:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:39,863 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 09:20:39,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180995665] [2020-11-12 09:20:39,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349469666] [2020-11-12 09:20:39,864 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 09:20:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 09:20:39,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:40,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:40,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:40,114 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 09:20:40,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:40,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-12 09:20:40,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133397007] [2020-11-12 09:20:40,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:20:40,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:20:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:20:40,118 INFO L87 Difference]: Start difference. First operand 1033 states and 1209 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 09:20:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:40,361 INFO L93 Difference]: Finished difference Result 2022 states and 2339 transitions. [2020-11-12 09:20:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 09:20:40,362 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 09:20:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:40,371 INFO L225 Difference]: With dead ends: 2022 [2020-11-12 09:20:40,372 INFO L226 Difference]: Without dead ends: 1688 [2020-11-12 09:20:40,372 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 09:20:40,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2020-11-12 09:20:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1043. [2020-11-12 09:20:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 931 states have (on average 1.322234156820623) internal successors, (1231), 1042 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1231 transitions. [2020-11-12 09:20:40,406 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1231 transitions. Word has length 38 [2020-11-12 09:20:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:40,407 INFO L481 AbstractCegarLoop]: Abstraction has 1043 states and 1231 transitions. [2020-11-12 09:20:40,407 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 09:20:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1231 transitions. [2020-11-12 09:20:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 09:20:40,409 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:40,409 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 09:20:40,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:40,623 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2086129541, now seen corresponding path program 1 times [2020-11-12 09:20:40,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:40,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409079862] [2020-11-12 09:20:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:40,924 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 09:20:40,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409079862] [2020-11-12 09:20:40,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:40,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 09:20:40,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181690221] [2020-11-12 09:20:40,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 09:20:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 09:20:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-12 09:20:40,928 INFO L87 Difference]: Start difference. First operand 1043 states and 1231 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 09:20:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:41,075 INFO L93 Difference]: Finished difference Result 1673 states and 1954 transitions. [2020-11-12 09:20:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 09:20:41,076 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 09:20:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:41,089 INFO L225 Difference]: With dead ends: 1673 [2020-11-12 09:20:41,089 INFO L226 Difference]: Without dead ends: 1515 [2020-11-12 09:20:41,090 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-12 09:20:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-11-12 09:20:41,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1084. [2020-11-12 09:20:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 972 states have (on average 1.3179012345679013) internal successors, (1281), 1083 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1281 transitions. [2020-11-12 09:20:41,129 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1281 transitions. Word has length 38 [2020-11-12 09:20:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:41,130 INFO L481 AbstractCegarLoop]: Abstraction has 1084 states and 1281 transitions. [2020-11-12 09:20:41,130 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 09:20:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1281 transitions. [2020-11-12 09:20:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 09:20:41,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:41,134 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 09:20:41,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 09:20:41,135 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:41,135 INFO L82 PathProgramCache]: Analyzing trace with hash -612433095, now seen corresponding path program 2 times [2020-11-12 09:20:41,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:41,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077798931] [2020-11-12 09:20:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:41,335 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 09:20:41,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077798931] [2020-11-12 09:20:41,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:41,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 09:20:41,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394296645] [2020-11-12 09:20:41,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 09:20:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:41,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 09:20:41,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-12 09:20:41,341 INFO L87 Difference]: Start difference. First operand 1084 states and 1281 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 09:20:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:41,605 INFO L93 Difference]: Finished difference Result 2074 states and 2395 transitions. [2020-11-12 09:20:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 09:20:41,606 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 09:20:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:41,614 INFO L225 Difference]: With dead ends: 2074 [2020-11-12 09:20:41,614 INFO L226 Difference]: Without dead ends: 1676 [2020-11-12 09:20:41,615 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:20:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2020-11-12 09:20:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1163. [2020-11-12 09:20:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1051 states have (on average 1.2987630827783063) internal successors, (1365), 1162 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1365 transitions. [2020-11-12 09:20:41,650 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1365 transitions. Word has length 38 [2020-11-12 09:20:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:41,652 INFO L481 AbstractCegarLoop]: Abstraction has 1163 states and 1365 transitions. [2020-11-12 09:20:41,652 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 09:20:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1365 transitions. [2020-11-12 09:20:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 09:20:41,654 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:41,655 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 09:20:41,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-12 09:20:41,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1859891804, now seen corresponding path program 1 times [2020-11-12 09:20:41,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:41,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107791938] [2020-11-12 09:20:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:41,883 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 09:20:41,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107791938] [2020-11-12 09:20:41,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518050136] [2020-11-12 09:20:41,884 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 09:20:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:20:41,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:42,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:42,094 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 09:20:42,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:42,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 09:20:42,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814128944] [2020-11-12 09:20:42,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:20:42,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:42,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:20:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:20:42,097 INFO L87 Difference]: Start difference. First operand 1163 states and 1365 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 09:20:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:42,319 INFO L93 Difference]: Finished difference Result 1830 states and 2133 transitions. [2020-11-12 09:20:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-12 09:20:42,320 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 09:20:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:42,329 INFO L225 Difference]: With dead ends: 1830 [2020-11-12 09:20:42,329 INFO L226 Difference]: Without dead ends: 1672 [2020-11-12 09:20:42,330 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 09:20:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2020-11-12 09:20:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1172. [2020-11-12 09:20:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1060 states have (on average 1.3028301886792453) internal successors, (1381), 1171 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1381 transitions. [2020-11-12 09:20:42,367 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1381 transitions. Word has length 43 [2020-11-12 09:20:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:42,368 INFO L481 AbstractCegarLoop]: Abstraction has 1172 states and 1381 transitions. [2020-11-12 09:20:42,368 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 09:20:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1381 transitions. [2020-11-12 09:20:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 09:20:42,371 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:42,371 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 09:20:42,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:42,585 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash -386195358, now seen corresponding path program 2 times [2020-11-12 09:20:42,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:42,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349384665] [2020-11-12 09:20:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:42,785 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 09:20:42,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349384665] [2020-11-12 09:20:42,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592359630] [2020-11-12 09:20:42,786 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 09:20:42,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:20:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:20:42,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:42,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:43,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:43,017 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 09:20:43,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:43,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 09:20:43,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184000639] [2020-11-12 09:20:43,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:20:43,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:20:43,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:20:43,020 INFO L87 Difference]: Start difference. First operand 1172 states and 1381 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 09:20:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:43,578 INFO L93 Difference]: Finished difference Result 2280 states and 2641 transitions. [2020-11-12 09:20:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:20:43,579 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 09:20:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:43,591 INFO L225 Difference]: With dead ends: 2280 [2020-11-12 09:20:43,592 INFO L226 Difference]: Without dead ends: 1946 [2020-11-12 09:20:43,593 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2020-11-12 09:20:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2020-11-12 09:20:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1184. [2020-11-12 09:20:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1072 states have (on average 1.3022388059701493) internal successors, (1396), 1183 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1396 transitions. [2020-11-12 09:20:43,632 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1396 transitions. Word has length 43 [2020-11-12 09:20:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:43,633 INFO L481 AbstractCegarLoop]: Abstraction has 1184 states and 1396 transitions. [2020-11-12 09:20:43,634 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 09:20:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1396 transitions. [2020-11-12 09:20:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 09:20:43,636 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:43,636 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 09:20:43,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:43,841 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1801206438, now seen corresponding path program 1 times [2020-11-12 09:20:43,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:43,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753542679] [2020-11-12 09:20:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:44,013 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 09:20:44,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753542679] [2020-11-12 09:20:44,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599433722] [2020-11-12 09:20:44,014 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 09:20:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:20:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:44,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:44,234 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 09:20:44,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:44,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 09:20:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804905407] [2020-11-12 09:20:44,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:20:44,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:20:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:20:44,237 INFO L87 Difference]: Start difference. First operand 1184 states and 1396 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 09:20:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:44,526 INFO L93 Difference]: Finished difference Result 2183 states and 2511 transitions. [2020-11-12 09:20:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 09:20:44,527 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 09:20:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:44,535 INFO L225 Difference]: With dead ends: 2183 [2020-11-12 09:20:44,535 INFO L226 Difference]: Without dead ends: 1873 [2020-11-12 09:20:44,536 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:20:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-11-12 09:20:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1301. [2020-11-12 09:20:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1189 states have (on average 1.2825904121110177) internal successors, (1525), 1300 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1525 transitions. [2020-11-12 09:20:44,575 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1525 transitions. Word has length 43 [2020-11-12 09:20:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:44,576 INFO L481 AbstractCegarLoop]: Abstraction has 1301 states and 1525 transitions. [2020-11-12 09:20:44,576 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 09:20:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1525 transitions. [2020-11-12 09:20:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 09:20:44,578 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:44,578 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 09:20:44,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:44,793 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash 657551016, now seen corresponding path program 2 times [2020-11-12 09:20:44,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:44,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311080388] [2020-11-12 09:20:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:44,929 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 09:20:44,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311080388] [2020-11-12 09:20:44,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766514600] [2020-11-12 09:20:44,930 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 09:20:45,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:20:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:20:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:45,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:45,169 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 09:20:45,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:45,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 09:20:45,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531706814] [2020-11-12 09:20:45,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:20:45,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:45,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:20:45,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:20:45,172 INFO L87 Difference]: Start difference. First operand 1301 states and 1525 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 09:20:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:45,409 INFO L93 Difference]: Finished difference Result 2034 states and 2362 transitions. [2020-11-12 09:20:45,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:20:45,410 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 09:20:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:45,418 INFO L225 Difference]: With dead ends: 2034 [2020-11-12 09:20:45,419 INFO L226 Difference]: Without dead ends: 1876 [2020-11-12 09:20:45,419 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:20:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2020-11-12 09:20:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1302. [2020-11-12 09:20:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1190 states have (on average 1.2831932773109245) internal successors, (1527), 1301 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1527 transitions. [2020-11-12 09:20:45,461 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1527 transitions. Word has length 43 [2020-11-12 09:20:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:45,461 INFO L481 AbstractCegarLoop]: Abstraction has 1302 states and 1527 transitions. [2020-11-12 09:20:45,462 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 09:20:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1527 transitions. [2020-11-12 09:20:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:45,464 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:45,464 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 09:20:45,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-12 09:20:45,680 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1095210246, now seen corresponding path program 2 times [2020-11-12 09:20:45,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:45,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620115246] [2020-11-12 09:20:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:45,895 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 09:20:45,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620115246] [2020-11-12 09:20:45,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907184624] [2020-11-12 09:20:45,896 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 09:20:45,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:20:45,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:46,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:46,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:46,169 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 09:20:46,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:46,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 09:20:46,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607648932] [2020-11-12 09:20:46,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:20:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:20:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:20:46,172 INFO L87 Difference]: Start difference. First operand 1302 states and 1527 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 09:20:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:46,510 INFO L93 Difference]: Finished difference Result 2348 states and 2716 transitions. [2020-11-12 09:20:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:20:46,511 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 09:20:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:46,520 INFO L225 Difference]: With dead ends: 2348 [2020-11-12 09:20:46,520 INFO L226 Difference]: Without dead ends: 2014 [2020-11-12 09:20:46,522 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 09:20:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2020-11-12 09:20:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1312. [2020-11-12 09:20:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1200 states have (on average 1.2908333333333333) internal successors, (1549), 1311 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1549 transitions. [2020-11-12 09:20:46,565 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1549 transitions. Word has length 48 [2020-11-12 09:20:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:46,565 INFO L481 AbstractCegarLoop]: Abstraction has 1312 states and 1549 transitions. [2020-11-12 09:20:46,566 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 09:20:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1549 transitions. [2020-11-12 09:20:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:46,567 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:46,568 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 09:20:46,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:46,782 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1403585051, now seen corresponding path program 3 times [2020-11-12 09:20:46,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:46,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684799593] [2020-11-12 09:20:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:46,961 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 09:20:46,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684799593] [2020-11-12 09:20:46,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135960777] [2020-11-12 09:20:46,962 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 09:20:47,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:20:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:47,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:47,211 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 09:20:47,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:47,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 09:20:47,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089434344] [2020-11-12 09:20:47,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:20:47,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:20:47,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:20:47,213 INFO L87 Difference]: Start difference. First operand 1312 states and 1549 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 09:20:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:47,425 INFO L93 Difference]: Finished difference Result 2069 states and 2417 transitions. [2020-11-12 09:20:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:20:47,426 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 09:20:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:47,434 INFO L225 Difference]: With dead ends: 2069 [2020-11-12 09:20:47,434 INFO L226 Difference]: Without dead ends: 1911 [2020-11-12 09:20:47,435 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:20:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2020-11-12 09:20:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1321. [2020-11-12 09:20:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1209 states have (on average 1.2944582299421008) internal successors, (1565), 1320 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1565 transitions. [2020-11-12 09:20:47,472 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1565 transitions. Word has length 48 [2020-11-12 09:20:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:47,473 INFO L481 AbstractCegarLoop]: Abstraction has 1321 states and 1565 transitions. [2020-11-12 09:20:47,473 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 09:20:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1565 transitions. [2020-11-12 09:20:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:47,475 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:47,475 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 09:20:47,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:47,688 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1417685799, now seen corresponding path program 4 times [2020-11-12 09:20:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:47,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110391103] [2020-11-12 09:20:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:47,888 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 09:20:47,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110391103] [2020-11-12 09:20:47,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532013077] [2020-11-12 09:20:47,889 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 09:20:47,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:20:47,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:47,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:47,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:48,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:48,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:48,248 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 09:20:48,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 09:20:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301065990] [2020-11-12 09:20:48,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:20:48,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:20:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:20:48,251 INFO L87 Difference]: Start difference. First operand 1321 states and 1565 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 09:20:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:49,365 INFO L93 Difference]: Finished difference Result 3150 states and 3643 transitions. [2020-11-12 09:20:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:20:49,365 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 09:20:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:49,374 INFO L225 Difference]: With dead ends: 3150 [2020-11-12 09:20:49,374 INFO L226 Difference]: Without dead ends: 2392 [2020-11-12 09:20:49,375 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=388, Invalid=1504, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:20:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2020-11-12 09:20:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 1378. [2020-11-12 09:20:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1266 states have (on average 1.287519747235387) internal successors, (1630), 1377 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1630 transitions. [2020-11-12 09:20:49,421 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1630 transitions. Word has length 48 [2020-11-12 09:20:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:49,421 INFO L481 AbstractCegarLoop]: Abstraction has 1378 states and 1630 transitions. [2020-11-12 09:20:49,421 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 09:20:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1630 transitions. [2020-11-12 09:20:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:49,423 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:49,423 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 09:20:49,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-12 09:20:49,638 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2146380417, now seen corresponding path program 1 times [2020-11-12 09:20:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:49,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935540362] [2020-11-12 09:20:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:49,841 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 09:20:49,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935540362] [2020-11-12 09:20:49,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062070882] [2020-11-12 09:20:49,842 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 09:20:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:49,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:50,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:50,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:50,106 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 09:20:50,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:50,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 09:20:50,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998823635] [2020-11-12 09:20:50,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:20:50,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:50,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:20:50,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:20:50,110 INFO L87 Difference]: Start difference. First operand 1378 states and 1630 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 09:20:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:51,516 INFO L93 Difference]: Finished difference Result 3544 states and 4093 transitions. [2020-11-12 09:20:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 09:20:51,517 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 09:20:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:51,528 INFO L225 Difference]: With dead ends: 3544 [2020-11-12 09:20:51,528 INFO L226 Difference]: Without dead ends: 2650 [2020-11-12 09:20:51,529 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=564, Invalid=2088, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:20:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2020-11-12 09:20:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 1551. [2020-11-12 09:20:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1439 states have (on average 1.2599027102154274) internal successors, (1813), 1550 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1813 transitions. [2020-11-12 09:20:51,583 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1813 transitions. Word has length 48 [2020-11-12 09:20:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:51,584 INFO L481 AbstractCegarLoop]: Abstraction has 1551 states and 1813 transitions. [2020-11-12 09:20:51,584 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 09:20:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1813 transitions. [2020-11-12 09:20:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:51,586 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:51,586 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 09:20:51,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:51,800 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1603136983, now seen corresponding path program 3 times [2020-11-12 09:20:51,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:51,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126947084] [2020-11-12 09:20:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:51,948 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 09:20:51,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126947084] [2020-11-12 09:20:51,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309935888] [2020-11-12 09:20:51,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:52,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:20:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:52,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:52,194 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 09:20:52,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:52,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 09:20:52,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886218134] [2020-11-12 09:20:52,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:20:52,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:20:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:20:52,196 INFO L87 Difference]: Start difference. First operand 1551 states and 1813 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 09:20:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:52,525 INFO L93 Difference]: Finished difference Result 2484 states and 2882 transitions. [2020-11-12 09:20:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 09:20:52,526 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 09:20:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:52,536 INFO L225 Difference]: With dead ends: 2484 [2020-11-12 09:20:52,536 INFO L226 Difference]: Without dead ends: 2326 [2020-11-12 09:20:52,537 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:20:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2020-11-12 09:20:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1557. [2020-11-12 09:20:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1445 states have (on average 1.2636678200692042) internal successors, (1826), 1556 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 1826 transitions. [2020-11-12 09:20:52,601 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 1826 transitions. Word has length 48 [2020-11-12 09:20:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:52,602 INFO L481 AbstractCegarLoop]: Abstraction has 1557 states and 1826 transitions. [2020-11-12 09:20:52,602 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 09:20:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 1826 transitions. [2020-11-12 09:20:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:52,605 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:52,605 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 09:20:52,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 09:20:52,819 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:52,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1363947367, now seen corresponding path program 4 times [2020-11-12 09:20:52,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:52,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709306281] [2020-11-12 09:20:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:52,944 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 09:20:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709306281] [2020-11-12 09:20:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844846119] [2020-11-12 09:20:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:53,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:20:53,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:53,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:53,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:53,198 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 09:20:53,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:53,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 09:20:53,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833197570] [2020-11-12 09:20:53,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:20:53,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:20:53,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:20:53,201 INFO L87 Difference]: Start difference. First operand 1557 states and 1826 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 09:20:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:53,632 INFO L93 Difference]: Finished difference Result 2535 states and 2930 transitions. [2020-11-12 09:20:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:20:53,633 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 09:20:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:53,647 INFO L225 Difference]: With dead ends: 2535 [2020-11-12 09:20:53,647 INFO L226 Difference]: Without dead ends: 2377 [2020-11-12 09:20:53,648 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-11-12 09:20:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2020-11-12 09:20:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1553. [2020-11-12 09:20:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1441 states have (on average 1.2609299097848716) internal successors, (1817), 1552 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 1817 transitions. [2020-11-12 09:20:53,699 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 1817 transitions. Word has length 48 [2020-11-12 09:20:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:53,699 INFO L481 AbstractCegarLoop]: Abstraction has 1553 states and 1817 transitions. [2020-11-12 09:20:53,701 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 09:20:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 1817 transitions. [2020-11-12 09:20:53,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:53,704 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:53,704 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 09:20:53,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-12 09:20:53,918 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash 892365347, now seen corresponding path program 2 times [2020-11-12 09:20:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:53,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136529223] [2020-11-12 09:20:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:54,071 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 09:20:54,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136529223] [2020-11-12 09:20:54,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836657970] [2020-11-12 09:20:54,072 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 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 09:20:54,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:20:54,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:54,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:54,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:54,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:54,307 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 09:20:54,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:54,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 09:20:54,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335899670] [2020-11-12 09:20:54,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:20:54,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:20:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:20:54,310 INFO L87 Difference]: Start difference. First operand 1553 states and 1817 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 09:20:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:55,233 INFO L93 Difference]: Finished difference Result 3306 states and 3830 transitions. [2020-11-12 09:20:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:20:55,235 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 09:20:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:55,241 INFO L225 Difference]: With dead ends: 3306 [2020-11-12 09:20:55,241 INFO L226 Difference]: Without dead ends: 2700 [2020-11-12 09:20:55,242 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 09:20:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2020-11-12 09:20:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 1553. [2020-11-12 09:20:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1441 states have (on average 1.2609299097848716) internal successors, (1817), 1552 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 1817 transitions. [2020-11-12 09:20:55,285 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 1817 transitions. Word has length 48 [2020-11-12 09:20:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:55,285 INFO L481 AbstractCegarLoop]: Abstraction has 1553 states and 1817 transitions. [2020-11-12 09:20:55,285 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 09:20:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 1817 transitions. [2020-11-12 09:20:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:20:55,287 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:55,287 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 09:20:55,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 09:20:55,502 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1996849156, now seen corresponding path program 5 times [2020-11-12 09:20:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:55,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243553752] [2020-11-12 09:20:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:55,658 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 09:20:55,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243553752] [2020-11-12 09:20:55,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594337971] [2020-11-12 09:20:55,658 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 09:20:55,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:20:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:20:55,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:55,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:55,925 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 09:20:55,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:55,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:20:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114324799] [2020-11-12 09:20:55,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:20:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:20:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:20:55,927 INFO L87 Difference]: Start difference. First operand 1553 states and 1817 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 09:20:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:56,176 INFO L93 Difference]: Finished difference Result 2391 states and 2775 transitions. [2020-11-12 09:20:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 09:20:56,177 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 09:20:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:56,180 INFO L225 Difference]: With dead ends: 2391 [2020-11-12 09:20:56,180 INFO L226 Difference]: Without dead ends: 2233 [2020-11-12 09:20:56,181 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 09:20:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2020-11-12 09:20:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1562. [2020-11-12 09:20:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1450 states have (on average 1.2641379310344827) internal successors, (1833), 1561 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1833 transitions. [2020-11-12 09:20:56,231 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1833 transitions. Word has length 53 [2020-11-12 09:20:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:56,231 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 1833 transitions. [2020-11-12 09:20:56,231 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 09:20:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1833 transitions. [2020-11-12 09:20:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:20:56,233 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:56,233 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 09:20:56,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 09:20:56,447 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash -824421694, now seen corresponding path program 6 times [2020-11-12 09:20:56,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:56,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187152915] [2020-11-12 09:20:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:56,593 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 09:20:56,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187152915] [2020-11-12 09:20:56,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600091039] [2020-11-12 09:20:56,594 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 09:20:56,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:20:56,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:20:56,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:56,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:56,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:56,905 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 09:20:56,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:56,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:20:56,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156880054] [2020-11-12 09:20:56,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:20:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:20:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:20:56,907 INFO L87 Difference]: Start difference. First operand 1562 states and 1833 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 09:20:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:57,791 INFO L93 Difference]: Finished difference Result 2780 states and 3208 transitions. [2020-11-12 09:20:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:20:57,792 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 09:20:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:57,795 INFO L225 Difference]: With dead ends: 2780 [2020-11-12 09:20:57,795 INFO L226 Difference]: Without dead ends: 2446 [2020-11-12 09:20:57,796 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2020-11-12 09:20:57,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2020-11-12 09:20:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1568. [2020-11-12 09:20:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1456 states have (on average 1.2644230769230769) internal successors, (1841), 1567 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 1841 transitions. [2020-11-12 09:20:57,829 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 1841 transitions. Word has length 53 [2020-11-12 09:20:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:57,830 INFO L481 AbstractCegarLoop]: Abstraction has 1568 states and 1841 transitions. [2020-11-12 09:20:57,830 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 09:20:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 1841 transitions. [2020-11-12 09:20:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:20:57,832 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:57,832 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 09:20:58,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:58,048 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1362980102, now seen corresponding path program 3 times [2020-11-12 09:20:58,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:58,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875290715] [2020-11-12 09:20:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:58,227 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 09:20:58,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875290715] [2020-11-12 09:20:58,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115488015] [2020-11-12 09:20:58,228 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 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 09:20:58,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:20:58,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:58,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:20:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:58,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:58,549 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 09:20:58,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:58,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:20:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114854406] [2020-11-12 09:20:58,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:20:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:20:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:20:58,552 INFO L87 Difference]: Start difference. First operand 1568 states and 1841 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 09:20:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:59,045 INFO L93 Difference]: Finished difference Result 2681 states and 3103 transitions. [2020-11-12 09:20:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:20:59,046 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 09:20:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:59,049 INFO L225 Difference]: With dead ends: 2681 [2020-11-12 09:20:59,049 INFO L226 Difference]: Without dead ends: 2523 [2020-11-12 09:20:59,050 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:20:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2020-11-12 09:20:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1570. [2020-11-12 09:20:59,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1458 states have (on average 1.2640603566529491) internal successors, (1843), 1569 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1843 transitions. [2020-11-12 09:20:59,084 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1843 transitions. Word has length 53 [2020-11-12 09:20:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:59,084 INFO L481 AbstractCegarLoop]: Abstraction has 1570 states and 1843 transitions. [2020-11-12 09:20:59,085 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 09:20:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1843 transitions. [2020-11-12 09:20:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:20:59,087 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:59,087 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 09:20:59,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:59,301 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1553116312, now seen corresponding path program 4 times [2020-11-12 09:20:59,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:59,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232895202] [2020-11-12 09:20:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:59,496 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 09:20:59,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232895202] [2020-11-12 09:20:59,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023048639] [2020-11-12 09:20:59,496 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 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 09:20:59,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:20:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:59,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:20:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:59,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:59,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:59,811 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 09:20:59,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:59,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:20:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844814460] [2020-11-12 09:20:59,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:20:59,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:59,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:20:59,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:20:59,814 INFO L87 Difference]: Start difference. First operand 1570 states and 1843 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 09:21:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:01,177 INFO L93 Difference]: Finished difference Result 2867 states and 3299 transitions. [2020-11-12 09:21:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:21:01,178 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 09:21:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:01,182 INFO L225 Difference]: With dead ends: 2867 [2020-11-12 09:21:01,183 INFO L226 Difference]: Without dead ends: 2533 [2020-11-12 09:21:01,184 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=483, Invalid=1497, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 09:21:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2020-11-12 09:21:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1575. [2020-11-12 09:21:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1463 states have (on average 1.2638414217361587) internal successors, (1849), 1574 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 1849 transitions. [2020-11-12 09:21:01,219 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 1849 transitions. Word has length 53 [2020-11-12 09:21:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:01,219 INFO L481 AbstractCegarLoop]: Abstraction has 1575 states and 1849 transitions. [2020-11-12 09:21:01,219 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 09:21:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 1849 transitions. [2020-11-12 09:21:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:01,223 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:01,223 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 09:21:01,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:01,427 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:01,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:01,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1319415484, now seen corresponding path program 5 times [2020-11-12 09:21:01,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:01,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942964007] [2020-11-12 09:21:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:01,631 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 09:21:01,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942964007] [2020-11-12 09:21:01,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382626234] [2020-11-12 09:21:01,632 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 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 09:21:01,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:21:01,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:01,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:02,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:02,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:02,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:02,104 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 09:21:02,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:02,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:02,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900581116] [2020-11-12 09:21:02,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:02,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:02,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:02,106 INFO L87 Difference]: Start difference. First operand 1575 states and 1849 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 09:21:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:02,688 INFO L93 Difference]: Finished difference Result 2773 states and 3198 transitions. [2020-11-12 09:21:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:21:02,689 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 09:21:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:02,694 INFO L225 Difference]: With dead ends: 2773 [2020-11-12 09:21:02,694 INFO L226 Difference]: Without dead ends: 2615 [2020-11-12 09:21:02,697 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 09:21:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2020-11-12 09:21:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 1575. [2020-11-12 09:21:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1463 states have (on average 1.2638414217361587) internal successors, (1849), 1574 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 1849 transitions. [2020-11-12 09:21:02,737 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 1849 transitions. Word has length 53 [2020-11-12 09:21:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:02,738 INFO L481 AbstractCegarLoop]: Abstraction has 1575 states and 1849 transitions. [2020-11-12 09:21:02,738 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 09:21:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 1849 transitions. [2020-11-12 09:21:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:02,741 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:02,741 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 09:21:02,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-12 09:21:02,954 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1009872878, now seen corresponding path program 6 times [2020-11-12 09:21:02,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:02,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643808074] [2020-11-12 09:21:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:03,139 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 09:21:03,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643808074] [2020-11-12 09:21:03,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762468573] [2020-11-12 09:21:03,140 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 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 09:21:03,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:21:03,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:03,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:03,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:03,474 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 09:21:03,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:03,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907169547] [2020-11-12 09:21:03,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:03,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:03,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:03,477 INFO L87 Difference]: Start difference. First operand 1575 states and 1849 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 09:21:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:04,223 INFO L93 Difference]: Finished difference Result 3256 states and 3740 transitions. [2020-11-12 09:21:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:21:04,223 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 09:21:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:04,229 INFO L225 Difference]: With dead ends: 3256 [2020-11-12 09:21:04,229 INFO L226 Difference]: Without dead ends: 2858 [2020-11-12 09:21:04,230 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 09:21:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2020-11-12 09:21:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 1705. [2020-11-12 09:21:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1593 states have (on average 1.2580037664783428) internal successors, (2004), 1704 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2004 transitions. [2020-11-12 09:21:04,271 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2004 transitions. Word has length 53 [2020-11-12 09:21:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:04,271 INFO L481 AbstractCegarLoop]: Abstraction has 1705 states and 2004 transitions. [2020-11-12 09:21:04,271 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 09:21:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2004 transitions. [2020-11-12 09:21:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:04,274 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:04,274 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 09:21:04,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 09:21:04,488 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash 482396802, now seen corresponding path program 7 times [2020-11-12 09:21:04,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:04,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114041364] [2020-11-12 09:21:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:04,664 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 09:21:04,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114041364] [2020-11-12 09:21:04,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843968040] [2020-11-12 09:21:04,665 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 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 09:21:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:04,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:04,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:04,945 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 09:21:04,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:04,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:04,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323551387] [2020-11-12 09:21:04,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:04,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:04,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:04,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:04,948 INFO L87 Difference]: Start difference. First operand 1705 states and 2004 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 09:21:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:06,282 INFO L93 Difference]: Finished difference Result 3150 states and 3624 transitions. [2020-11-12 09:21:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:21:06,283 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 09:21:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:06,290 INFO L225 Difference]: With dead ends: 3150 [2020-11-12 09:21:06,290 INFO L226 Difference]: Without dead ends: 2816 [2020-11-12 09:21:06,291 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:21:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2020-11-12 09:21:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 1709. [2020-11-12 09:21:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1597 states have (on average 1.258609893550407) internal successors, (2010), 1708 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2010 transitions. [2020-11-12 09:21:06,328 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2010 transitions. Word has length 53 [2020-11-12 09:21:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:06,328 INFO L481 AbstractCegarLoop]: Abstraction has 1709 states and 2010 transitions. [2020-11-12 09:21:06,329 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 09:21:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2010 transitions. [2020-11-12 09:21:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:06,331 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:06,331 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 09:21:06,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-12 09:21:06,545 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -770683262, now seen corresponding path program 8 times [2020-11-12 09:21:06,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:06,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876802694] [2020-11-12 09:21:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:06,728 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 09:21:06,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876802694] [2020-11-12 09:21:06,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982708960] [2020-11-12 09:21:06,729 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 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 09:21:06,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:06,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:06,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:06,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:06,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:07,007 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 09:21:07,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:07,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:07,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219869389] [2020-11-12 09:21:07,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:07,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:07,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:07,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:07,009 INFO L87 Difference]: Start difference. First operand 1709 states and 2010 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 09:21:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:07,862 INFO L93 Difference]: Finished difference Result 3142 states and 3630 transitions. [2020-11-12 09:21:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:21:07,863 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 09:21:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:07,867 INFO L225 Difference]: With dead ends: 3142 [2020-11-12 09:21:07,868 INFO L226 Difference]: Without dead ends: 2984 [2020-11-12 09:21:07,869 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=396, Invalid=1326, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:21:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2020-11-12 09:21:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 1701. [2020-11-12 09:21:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1589 states have (on average 1.2567652611705475) internal successors, (1997), 1700 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 1997 transitions. [2020-11-12 09:21:07,907 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 1997 transitions. Word has length 53 [2020-11-12 09:21:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:07,907 INFO L481 AbstractCegarLoop]: Abstraction has 1701 states and 1997 transitions. [2020-11-12 09:21:07,907 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 09:21:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 1997 transitions. [2020-11-12 09:21:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:07,910 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:07,910 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 09:21:08,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 09:21:08,125 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1485629452, now seen corresponding path program 9 times [2020-11-12 09:21:08,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:08,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517251930] [2020-11-12 09:21:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:08,299 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 09:21:08,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517251930] [2020-11-12 09:21:08,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955215560] [2020-11-12 09:21:08,299 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 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 09:21:08,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:21:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:08,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:08,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:08,574 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 09:21:08,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:08,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:08,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487555886] [2020-11-12 09:21:08,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:08,578 INFO L87 Difference]: Start difference. First operand 1701 states and 1997 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 09:21:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:09,932 INFO L93 Difference]: Finished difference Result 3132 states and 3622 transitions. [2020-11-12 09:21:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-12 09:21:09,938 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 09:21:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:09,941 INFO L225 Difference]: With dead ends: 3132 [2020-11-12 09:21:09,941 INFO L226 Difference]: Without dead ends: 2798 [2020-11-12 09:21:09,943 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=705, Invalid=2157, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:21:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2020-11-12 09:21:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1716. [2020-11-12 09:21:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1604 states have (on average 1.2556109725685785) internal successors, (2014), 1715 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2014 transitions. [2020-11-12 09:21:09,978 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2014 transitions. Word has length 53 [2020-11-12 09:21:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:09,979 INFO L481 AbstractCegarLoop]: Abstraction has 1716 states and 2014 transitions. [2020-11-12 09:21:09,979 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 09:21:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2014 transitions. [2020-11-12 09:21:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:09,981 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:09,981 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 09:21:10,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-12 09:21:10,195 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:10,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1036896852, now seen corresponding path program 10 times [2020-11-12 09:21:10,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:10,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651898474] [2020-11-12 09:21:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:10,349 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 09:21:10,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651898474] [2020-11-12 09:21:10,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553987440] [2020-11-12 09:21:10,350 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 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 09:21:10,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:21:10,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:10,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:10,657 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 09:21:10,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:10,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:10,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136602537] [2020-11-12 09:21:10,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:10,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:10,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:10,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:10,659 INFO L87 Difference]: Start difference. First operand 1716 states and 2014 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 09:21:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:11,560 INFO L93 Difference]: Finished difference Result 2847 states and 3312 transitions. [2020-11-12 09:21:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:21:11,561 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 09:21:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:11,564 INFO L225 Difference]: With dead ends: 2847 [2020-11-12 09:21:11,564 INFO L226 Difference]: Without dead ends: 2689 [2020-11-12 09:21:11,564 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:21:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2020-11-12 09:21:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 1712. [2020-11-12 09:21:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1600 states have (on average 1.253125) internal successors, (2005), 1711 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2005 transitions. [2020-11-12 09:21:11,595 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2005 transitions. Word has length 53 [2020-11-12 09:21:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:11,596 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 2005 transitions. [2020-11-12 09:21:11,596 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 09:21:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2005 transitions. [2020-11-12 09:21:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:11,598 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:11,598 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 09:21:11,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:11,813 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash 418033182, now seen corresponding path program 7 times [2020-11-12 09:21:11,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:11,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343370730] [2020-11-12 09:21:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:12,001 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 09:21:12,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343370730] [2020-11-12 09:21:12,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146844588] [2020-11-12 09:21:12,001 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 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 09:21:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:12,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:12,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:12,242 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 09:21:12,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:12,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:12,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724922380] [2020-11-12 09:21:12,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:12,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:12,245 INFO L87 Difference]: Start difference. First operand 1712 states and 2005 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 09:21:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:13,104 INFO L93 Difference]: Finished difference Result 3519 states and 4078 transitions. [2020-11-12 09:21:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:21:13,105 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 09:21:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:13,108 INFO L225 Difference]: With dead ends: 3519 [2020-11-12 09:21:13,108 INFO L226 Difference]: Without dead ends: 2913 [2020-11-12 09:21:13,109 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=401, Invalid=1491, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:21:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2020-11-12 09:21:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 1727. [2020-11-12 09:21:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1615 states have (on average 1.2594427244582043) internal successors, (2034), 1726 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2034 transitions. [2020-11-12 09:21:13,141 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2034 transitions. Word has length 53 [2020-11-12 09:21:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:13,141 INFO L481 AbstractCegarLoop]: Abstraction has 1727 states and 2034 transitions. [2020-11-12 09:21:13,141 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 09:21:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2034 transitions. [2020-11-12 09:21:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:13,144 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:13,144 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 09:21:13,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-12 09:21:13,358 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash -702095706, now seen corresponding path program 3 times [2020-11-12 09:21:13,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:13,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808889053] [2020-11-12 09:21:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:13,635 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 09:21:13,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808889053] [2020-11-12 09:21:13,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053962861] [2020-11-12 09:21:13,636 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 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 09:21:13,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 09:21:13,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:13,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:13,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:13,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:13,990 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 09:21:13,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:13,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:13,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655790209] [2020-11-12 09:21:13,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:13,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:13,993 INFO L87 Difference]: Start difference. First operand 1727 states and 2034 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 09:21:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:14,414 INFO L93 Difference]: Finished difference Result 2853 states and 3303 transitions. [2020-11-12 09:21:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:21:14,414 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 09:21:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:14,417 INFO L225 Difference]: With dead ends: 2853 [2020-11-12 09:21:14,418 INFO L226 Difference]: Without dead ends: 2519 [2020-11-12 09:21:14,418 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 09:21:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2020-11-12 09:21:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1737. [2020-11-12 09:21:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1625 states have (on average 1.2652307692307692) internal successors, (2056), 1736 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2056 transitions. [2020-11-12 09:21:14,464 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2056 transitions. Word has length 58 [2020-11-12 09:21:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:14,464 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 2056 transitions. [2020-11-12 09:21:14,464 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 09:21:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2056 transitions. [2020-11-12 09:21:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:14,468 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:14,468 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 09:21:14,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-12 09:21:14,681 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -393720901, now seen corresponding path program 8 times [2020-11-12 09:21:14,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:14,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054758871] [2020-11-12 09:21:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:15,002 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 09:21:15,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054758871] [2020-11-12 09:21:15,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92497394] [2020-11-12 09:21:15,003 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 09:21:15,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:15,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:15,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:15,495 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 09:21:15,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:15,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:15,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048458901] [2020-11-12 09:21:15,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:15,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:15,498 INFO L87 Difference]: Start difference. First operand 1737 states and 2056 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 09:21:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:15,867 INFO L93 Difference]: Finished difference Result 2796 states and 3278 transitions. [2020-11-12 09:21:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 09:21:15,867 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 09:21:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:15,870 INFO L225 Difference]: With dead ends: 2796 [2020-11-12 09:21:15,870 INFO L226 Difference]: Without dead ends: 2638 [2020-11-12 09:21:15,872 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-11-12 09:21:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2020-11-12 09:21:15,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 1746. [2020-11-12 09:21:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1634 states have (on average 1.2680538555691554) internal successors, (2072), 1745 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2072 transitions. [2020-11-12 09:21:15,902 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2072 transitions. Word has length 58 [2020-11-12 09:21:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:15,903 INFO L481 AbstractCegarLoop]: Abstraction has 1746 states and 2072 transitions. [2020-11-12 09:21:15,903 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 09:21:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2072 transitions. [2020-11-12 09:21:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:15,905 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:15,906 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 09:21:16,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:16,120 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1079975545, now seen corresponding path program 9 times [2020-11-12 09:21:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:16,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995485575] [2020-11-12 09:21:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:16,300 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 09:21:16,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995485575] [2020-11-12 09:21:16,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635667192] [2020-11-12 09:21:16,301 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 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 09:21:16,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:21:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:16,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:16,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:16,659 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 09:21:16,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:16,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:21:16,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338427744] [2020-11-12 09:21:16,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:21:16,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:16,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:21:16,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:21:16,662 INFO L87 Difference]: Start difference. First operand 1746 states and 2072 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 09:21:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:17,724 INFO L93 Difference]: Finished difference Result 3249 states and 3766 transitions. [2020-11-12 09:21:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:21:17,725 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 09:21:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:17,728 INFO L225 Difference]: With dead ends: 3249 [2020-11-12 09:21:17,728 INFO L226 Difference]: Without dead ends: 2915 [2020-11-12 09:21:17,729 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:21:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2020-11-12 09:21:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 1746. [2020-11-12 09:21:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1634 states have (on average 1.2680538555691554) internal successors, (2072), 1745 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2072 transitions. [2020-11-12 09:21:17,756 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2072 transitions. Word has length 58 [2020-11-12 09:21:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:17,756 INFO L481 AbstractCegarLoop]: Abstraction has 1746 states and 2072 transitions. [2020-11-12 09:21:17,756 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 09:21:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2072 transitions. [2020-11-12 09:21:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:17,760 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:17,760 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 09:21:17,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:17,974 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1027589955, now seen corresponding path program 11 times [2020-11-12 09:21:17,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:17,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505264254] [2020-11-12 09:21:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:18,230 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 09:21:18,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505264254] [2020-11-12 09:21:18,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350039693] [2020-11-12 09:21:18,231 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 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 09:21:18,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:21:18,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:18,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:18,749 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 09:21:18,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:18,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:18,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085474413] [2020-11-12 09:21:18,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:18,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:18,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:18,752 INFO L87 Difference]: Start difference. First operand 1746 states and 2072 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 09:21:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:19,372 INFO L93 Difference]: Finished difference Result 3044 states and 3547 transitions. [2020-11-12 09:21:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 09:21:19,373 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 09:21:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:19,376 INFO L225 Difference]: With dead ends: 3044 [2020-11-12 09:21:19,376 INFO L226 Difference]: Without dead ends: 2886 [2020-11-12 09:21:19,376 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 09:21:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2020-11-12 09:21:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1746. [2020-11-12 09:21:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1634 states have (on average 1.2680538555691554) internal successors, (2072), 1745 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2072 transitions. [2020-11-12 09:21:19,407 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2072 transitions. Word has length 58 [2020-11-12 09:21:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:19,408 INFO L481 AbstractCegarLoop]: Abstraction has 1746 states and 2072 transitions. [2020-11-12 09:21:19,408 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 09:21:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2072 transitions. [2020-11-12 09:21:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:19,411 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:19,411 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 09:21:19,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-12 09:21:19,625 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:19,626 INFO L82 PathProgramCache]: Analyzing trace with hash -851939025, now seen corresponding path program 12 times [2020-11-12 09:21:19,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:19,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253634425] [2020-11-12 09:21:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:19,808 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 09:21:19,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253634425] [2020-11-12 09:21:19,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252066983] [2020-11-12 09:21:19,808 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 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 09:21:19,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:21:19,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:19,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:19,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:20,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:20,263 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 09:21:20,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:20,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361137448] [2020-11-12 09:21:20,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:20,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:20,265 INFO L87 Difference]: Start difference. First operand 1746 states and 2072 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 09:21:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:22,500 INFO L93 Difference]: Finished difference Result 3310 states and 3853 transitions. [2020-11-12 09:21:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 09:21:22,500 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 09:21:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:22,504 INFO L225 Difference]: With dead ends: 3310 [2020-11-12 09:21:22,504 INFO L226 Difference]: Without dead ends: 3064 [2020-11-12 09:21:22,505 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 09:21:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2020-11-12 09:21:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1746. [2020-11-12 09:21:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1634 states have (on average 1.2680538555691554) internal successors, (2072), 1745 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2072 transitions. [2020-11-12 09:21:22,540 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2072 transitions. Word has length 58 [2020-11-12 09:21:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:22,541 INFO L481 AbstractCegarLoop]: Abstraction has 1746 states and 2072 transitions. [2020-11-12 09:21:22,541 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 09:21:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2072 transitions. [2020-11-12 09:21:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:22,544 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:22,544 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 09:21:22,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:22,759 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash 351280927, now seen corresponding path program 13 times [2020-11-12 09:21:22,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:22,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138874090] [2020-11-12 09:21:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:22,942 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 09:21:22,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138874090] [2020-11-12 09:21:22,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668107017] [2020-11-12 09:21:22,943 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 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 09:21:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:23,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:23,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:23,324 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 09:21:23,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:23,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:21:23,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31100379] [2020-11-12 09:21:23,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:21:23,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:21:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:21:23,327 INFO L87 Difference]: Start difference. First operand 1746 states and 2072 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 09:21:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:24,729 INFO L93 Difference]: Finished difference Result 3186 states and 3704 transitions. [2020-11-12 09:21:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:21:24,730 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 09:21:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:24,732 INFO L225 Difference]: With dead ends: 3186 [2020-11-12 09:21:24,732 INFO L226 Difference]: Without dead ends: 2852 [2020-11-12 09:21:24,734 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=511, Invalid=1651, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:21:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-11-12 09:21:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1748. [2020-11-12 09:21:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1636 states have (on average 1.2677261613691932) internal successors, (2074), 1747 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2074 transitions. [2020-11-12 09:21:24,768 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2074 transitions. Word has length 58 [2020-11-12 09:21:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:24,768 INFO L481 AbstractCegarLoop]: Abstraction has 1748 states and 2074 transitions. [2020-11-12 09:21:24,768 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 09:21:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2074 transitions. [2020-11-12 09:21:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:24,772 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:24,772 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 09:21:24,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-12 09:21:24,987 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:24,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2123721919, now seen corresponding path program 14 times [2020-11-12 09:21:24,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:24,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492369401] [2020-11-12 09:21:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:25,176 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 09:21:25,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492369401] [2020-11-12 09:21:25,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339243107] [2020-11-12 09:21:25,177 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 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 09:21:25,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:25,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:25,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:25,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:25,602 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 09:21:25,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:25,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:25,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919844613] [2020-11-12 09:21:25,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:25,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:25,605 INFO L87 Difference]: Start difference. First operand 1748 states and 2074 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 09:21:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:26,809 INFO L93 Difference]: Finished difference Result 2889 states and 3375 transitions. [2020-11-12 09:21:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:21:26,810 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 09:21:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:26,813 INFO L225 Difference]: With dead ends: 2889 [2020-11-12 09:21:26,813 INFO L226 Difference]: Without dead ends: 2731 [2020-11-12 09:21:26,814 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:21:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2020-11-12 09:21:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1746. [2020-11-12 09:21:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1634 states have (on average 1.2680538555691554) internal successors, (2072), 1745 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2072 transitions. [2020-11-12 09:21:26,836 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2072 transitions. Word has length 58 [2020-11-12 09:21:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:26,836 INFO L481 AbstractCegarLoop]: Abstraction has 1746 states and 2072 transitions. [2020-11-12 09:21:26,836 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 09:21:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2072 transitions. [2020-11-12 09:21:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:26,838 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:26,838 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 09:21:27,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:27,053 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:27,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:27,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1151169671, now seen corresponding path program 15 times [2020-11-12 09:21:27,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:27,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766854511] [2020-11-12 09:21:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:27,252 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 09:21:27,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766854511] [2020-11-12 09:21:27,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634841632] [2020-11-12 09:21:27,253 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 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 09:21:27,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:21:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:27,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:27,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,763 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 09:21:27,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:27,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:27,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041666060] [2020-11-12 09:21:27,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:27,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:27,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:27,765 INFO L87 Difference]: Start difference. First operand 1746 states and 2072 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 09:21:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:28,794 INFO L93 Difference]: Finished difference Result 3278 states and 3816 transitions. [2020-11-12 09:21:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:21:28,803 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 09:21:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:28,805 INFO L225 Difference]: With dead ends: 3278 [2020-11-12 09:21:28,806 INFO L226 Difference]: Without dead ends: 3120 [2020-11-12 09:21:28,806 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 09:21:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2020-11-12 09:21:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 1751. [2020-11-12 09:21:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1639 states have (on average 1.2678462477120196) internal successors, (2078), 1750 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2078 transitions. [2020-11-12 09:21:28,839 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2078 transitions. Word has length 58 [2020-11-12 09:21:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:28,839 INFO L481 AbstractCegarLoop]: Abstraction has 1751 states and 2078 transitions. [2020-11-12 09:21:28,840 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 09:21:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2078 transitions. [2020-11-12 09:21:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:28,842 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:28,842 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 09:21:29,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-12 09:21:29,056 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:29,056 INFO L82 PathProgramCache]: Analyzing trace with hash 894524361, now seen corresponding path program 16 times [2020-11-12 09:21:29,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:29,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442068717] [2020-11-12 09:21:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:29,242 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 09:21:29,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442068717] [2020-11-12 09:21:29,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678723281] [2020-11-12 09:21:29,243 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 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 09:21:29,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:29,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:29,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:21:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:29,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:29,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:29,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:29,681 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 09:21:29,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:29,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:29,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487497427] [2020-11-12 09:21:29,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:29,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:29,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:29,683 INFO L87 Difference]: Start difference. First operand 1751 states and 2078 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 09:21:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:30,738 INFO L93 Difference]: Finished difference Result 3187 states and 3724 transitions. [2020-11-12 09:21:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:21:30,738 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 09:21:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:30,741 INFO L225 Difference]: With dead ends: 3187 [2020-11-12 09:21:30,741 INFO L226 Difference]: Without dead ends: 3029 [2020-11-12 09:21:30,742 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 09:21:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2020-11-12 09:21:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1750. [2020-11-12 09:21:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1638 states have (on average 1.2704517704517704) internal successors, (2081), 1749 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2081 transitions. [2020-11-12 09:21:30,762 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2081 transitions. Word has length 58 [2020-11-12 09:21:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:30,763 INFO L481 AbstractCegarLoop]: Abstraction has 1750 states and 2081 transitions. [2020-11-12 09:21:30,763 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 09:21:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2081 transitions. [2020-11-12 09:21:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:30,764 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:30,764 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 09:21:30,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-12 09:21:30,965 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:30,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1908173255, now seen corresponding path program 17 times [2020-11-12 09:21:30,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:30,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237938130] [2020-11-12 09:21:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:31,159 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 09:21:31,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237938130] [2020-11-12 09:21:31,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313333] [2020-11-12 09:21:31,160 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 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 09:21:31,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:21:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:31,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:31,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:31,533 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 09:21:31,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:31,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:21:31,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573486370] [2020-11-12 09:21:31,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:21:31,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:21:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:21:31,541 INFO L87 Difference]: Start difference. First operand 1750 states and 2081 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 09:21:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:33,663 INFO L93 Difference]: Finished difference Result 3306 states and 3846 transitions. [2020-11-12 09:21:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-12 09:21:33,664 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 09:21:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:33,667 INFO L225 Difference]: With dead ends: 3306 [2020-11-12 09:21:33,667 INFO L226 Difference]: Without dead ends: 2972 [2020-11-12 09:21:33,668 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=772, Invalid=2420, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 09:21:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2020-11-12 09:21:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 1747. [2020-11-12 09:21:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1635 states have (on average 1.270336391437309) internal successors, (2077), 1746 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2077 transitions. [2020-11-12 09:21:33,689 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2077 transitions. Word has length 58 [2020-11-12 09:21:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:33,689 INFO L481 AbstractCegarLoop]: Abstraction has 1747 states and 2077 transitions. [2020-11-12 09:21:33,689 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 09:21:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2077 transitions. [2020-11-12 09:21:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:33,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:33,691 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 09:21:33,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-12 09:21:33,891 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash -135732263, now seen corresponding path program 18 times [2020-11-12 09:21:33,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:33,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507305149] [2020-11-12 09:21:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:34,086 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 09:21:34,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507305149] [2020-11-12 09:21:34,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712409754] [2020-11-12 09:21:34,086 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 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 09:21:34,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:21:34,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:34,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:34,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:34,582 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 09:21:34,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:34,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:34,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991349865] [2020-11-12 09:21:34,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:34,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:34,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:34,584 INFO L87 Difference]: Start difference. First operand 1747 states and 2077 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 09:21:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:36,162 INFO L93 Difference]: Finished difference Result 2983 states and 3496 transitions. [2020-11-12 09:21:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:21:36,163 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 09:21:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:36,166 INFO L225 Difference]: With dead ends: 2983 [2020-11-12 09:21:36,166 INFO L226 Difference]: Without dead ends: 2825 [2020-11-12 09:21:36,167 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:21:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2020-11-12 09:21:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 1750. [2020-11-12 09:21:36,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1638 states have (on average 1.2704517704517704) internal successors, (2081), 1749 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2081 transitions. [2020-11-12 09:21:36,190 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2081 transitions. Word has length 58 [2020-11-12 09:21:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:36,190 INFO L481 AbstractCegarLoop]: Abstraction has 1750 states and 2081 transitions. [2020-11-12 09:21:36,190 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 09:21:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2081 transitions. [2020-11-12 09:21:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:36,192 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:36,192 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 09:21:36,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-12 09:21:36,396 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:36,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1133713977, now seen corresponding path program 19 times [2020-11-12 09:21:36,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:36,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354245286] [2020-11-12 09:21:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:36,587 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 09:21:36,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354245286] [2020-11-12 09:21:36,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433286935] [2020-11-12 09:21:36,588 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 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 09:21:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:37,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:37,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:37,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:37,058 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 09:21:37,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:37,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:37,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200002175] [2020-11-12 09:21:37,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:37,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:37,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:37,060 INFO L87 Difference]: Start difference. First operand 1750 states and 2081 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 09:21:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:38,563 INFO L93 Difference]: Finished difference Result 3105 states and 3616 transitions. [2020-11-12 09:21:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:21:38,564 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 09:21:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:38,566 INFO L225 Difference]: With dead ends: 3105 [2020-11-12 09:21:38,566 INFO L226 Difference]: Without dead ends: 2947 [2020-11-12 09:21:38,567 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=474, Invalid=1688, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:21:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-11-12 09:21:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1751. [2020-11-12 09:21:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1639 states have (on average 1.2708968883465528) internal successors, (2083), 1750 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2083 transitions. [2020-11-12 09:21:38,591 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2083 transitions. Word has length 58 [2020-11-12 09:21:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:38,591 INFO L481 AbstractCegarLoop]: Abstraction has 1751 states and 2083 transitions. [2020-11-12 09:21:38,591 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 09:21:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2083 transitions. [2020-11-12 09:21:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:38,593 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:38,593 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 09:21:38,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-12 09:21:38,795 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash -904940605, now seen corresponding path program 20 times [2020-11-12 09:21:38,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:38,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533407432] [2020-11-12 09:21:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:38,979 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 09:21:38,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533407432] [2020-11-12 09:21:38,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413888973] [2020-11-12 09:21:38,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:21:39,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:39,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:39,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:39,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:39,418 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 09:21:39,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:39,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:21:39,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276818856] [2020-11-12 09:21:39,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:21:39,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:39,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:21:39,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:21:39,420 INFO L87 Difference]: Start difference. First operand 1751 states and 2083 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 09:21:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:41,697 INFO L93 Difference]: Finished difference Result 3316 states and 3853 transitions. [2020-11-12 09:21:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 09:21:41,698 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 09:21:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:41,701 INFO L225 Difference]: With dead ends: 3316 [2020-11-12 09:21:41,701 INFO L226 Difference]: Without dead ends: 2982 [2020-11-12 09:21:41,702 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 09:21:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2020-11-12 09:21:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1755. [2020-11-12 09:21:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1643 states have (on average 1.27084601339014) internal successors, (2088), 1754 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2088 transitions. [2020-11-12 09:21:41,732 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2088 transitions. Word has length 58 [2020-11-12 09:21:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:41,733 INFO L481 AbstractCegarLoop]: Abstraction has 1755 states and 2088 transitions. [2020-11-12 09:21:41,733 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 09:21:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2088 transitions. [2020-11-12 09:21:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:41,735 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:41,735 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 09:21:41,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-12 09:21:41,950 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash 867500387, now seen corresponding path program 21 times [2020-11-12 09:21:41,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:41,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965416756] [2020-11-12 09:21:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:42,141 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 09:21:42,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965416756] [2020-11-12 09:21:42,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671750464] [2020-11-12 09:21:42,142 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 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 09:21:42,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:21:42,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:42,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:42,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:42,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:42,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:42,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:42,582 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 09:21:42,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:42,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:42,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513613308] [2020-11-12 09:21:42,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:42,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:42,584 INFO L87 Difference]: Start difference. First operand 1755 states and 2088 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 09:21:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:43,946 INFO L93 Difference]: Finished difference Result 2826 states and 3305 transitions. [2020-11-12 09:21:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:21:43,947 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 09:21:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:43,949 INFO L225 Difference]: With dead ends: 2826 [2020-11-12 09:21:43,949 INFO L226 Difference]: Without dead ends: 2668 [2020-11-12 09:21:43,949 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:21:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2020-11-12 09:21:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1746. [2020-11-12 09:21:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1634 states have (on average 1.2711138310893513) internal successors, (2077), 1745 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2077 transitions. [2020-11-12 09:21:43,973 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2077 transitions. Word has length 58 [2020-11-12 09:21:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:43,973 INFO L481 AbstractCegarLoop]: Abstraction has 1746 states and 2077 transitions. [2020-11-12 09:21:43,974 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 09:21:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2077 transitions. [2020-11-12 09:21:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:43,975 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:43,976 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 09:21:44,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-12 09:21:44,185 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1494009903, now seen corresponding path program 22 times [2020-11-12 09:21:44,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:44,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688360026] [2020-11-12 09:21:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:44,417 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 09:21:44,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688360026] [2020-11-12 09:21:44,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250425146] [2020-11-12 09:21:44,418 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 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 09:21:44,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:44,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:21:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:44,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:44,814 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 09:21:44,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:44,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:44,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023238866] [2020-11-12 09:21:44,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:44,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:44,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:44,816 INFO L87 Difference]: Start difference. First operand 1746 states and 2077 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 09:21:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:46,032 INFO L93 Difference]: Finished difference Result 3886 states and 4498 transitions. [2020-11-12 09:21:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 09:21:46,033 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 09:21:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:46,036 INFO L225 Difference]: With dead ends: 3886 [2020-11-12 09:21:46,036 INFO L226 Difference]: Without dead ends: 3304 [2020-11-12 09:21:46,037 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=422, Invalid=1470, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:21:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2020-11-12 09:21:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 1905. [2020-11-12 09:21:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1793 states have (on average 1.2515337423312884) internal successors, (2244), 1904 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2244 transitions. [2020-11-12 09:21:46,061 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2244 transitions. Word has length 58 [2020-11-12 09:21:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:46,062 INFO L481 AbstractCegarLoop]: Abstraction has 1905 states and 2244 transitions. [2020-11-12 09:21:46,063 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 09:21:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2244 transitions. [2020-11-12 09:21:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:46,065 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:46,065 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 09:21:46,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:46,280 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:46,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1237364593, now seen corresponding path program 23 times [2020-11-12 09:21:46,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:46,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031180217] [2020-11-12 09:21:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:46,526 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 09:21:46,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031180217] [2020-11-12 09:21:46,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067277488] [2020-11-12 09:21:46,527 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 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 09:21:46,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:21:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:46,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:46,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:46,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:46,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:46,929 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 09:21:46,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:46,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798793338] [2020-11-12 09:21:46,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:46,931 INFO L87 Difference]: Start difference. First operand 1905 states and 2244 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 09:21:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:48,274 INFO L93 Difference]: Finished difference Result 3685 states and 4274 transitions. [2020-11-12 09:21:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 09:21:48,275 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 09:21:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:48,279 INFO L225 Difference]: With dead ends: 3685 [2020-11-12 09:21:48,279 INFO L226 Difference]: Without dead ends: 3527 [2020-11-12 09:21:48,279 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:21:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2020-11-12 09:21:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 1907. [2020-11-12 09:21:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1795 states have (on average 1.2540389972144848) internal successors, (2251), 1906 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 2251 transitions. [2020-11-12 09:21:48,304 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 2251 transitions. Word has length 58 [2020-11-12 09:21:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:48,304 INFO L481 AbstractCegarLoop]: Abstraction has 1907 states and 2251 transitions. [2020-11-12 09:21:48,304 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 09:21:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 2251 transitions. [2020-11-12 09:21:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:48,306 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:48,306 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 09:21:48,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-12 09:21:48,522 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:48,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1864044729, now seen corresponding path program 24 times [2020-11-12 09:21:48,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:48,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357591346] [2020-11-12 09:21:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:48,735 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 09:21:48,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357591346] [2020-11-12 09:21:48,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543361656] [2020-11-12 09:21:48,735 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 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 09:21:48,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:21:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:49,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:49,116 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 09:21:49,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:49,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:49,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562379741] [2020-11-12 09:21:49,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:49,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:49,117 INFO L87 Difference]: Start difference. First operand 1907 states and 2251 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 09:21:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:50,252 INFO L93 Difference]: Finished difference Result 3593 states and 4187 transitions. [2020-11-12 09:21:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:21:50,253 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 09:21:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:50,257 INFO L225 Difference]: With dead ends: 3593 [2020-11-12 09:21:50,257 INFO L226 Difference]: Without dead ends: 3435 [2020-11-12 09:21:50,258 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 09:21:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-12 09:21:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 1924. [2020-11-12 09:21:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1812 states have (on average 1.2577262693156732) internal successors, (2279), 1923 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2279 transitions. [2020-11-12 09:21:50,296 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2279 transitions. Word has length 58 [2020-11-12 09:21:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:50,299 INFO L481 AbstractCegarLoop]: Abstraction has 1924 states and 2279 transitions. [2020-11-12 09:21:50,299 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 09:21:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2279 transitions. [2020-11-12 09:21:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:50,302 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:50,302 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 09:21:50,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:50,517 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:50,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash 769687391, now seen corresponding path program 25 times [2020-11-12 09:21:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:50,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798026797] [2020-11-12 09:21:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:50,762 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 09:21:50,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798026797] [2020-11-12 09:21:50,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650792082] [2020-11-12 09:21:50,763 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 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 09:21:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:51,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:51,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:51,057 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 09:21:51,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:51,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:21:51,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329048798] [2020-11-12 09:21:51,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:21:51,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:21:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:21:51,059 INFO L87 Difference]: Start difference. First operand 1924 states and 2279 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 09:21:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:53,403 INFO L93 Difference]: Finished difference Result 3816 states and 4430 transitions. [2020-11-12 09:21:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 09:21:53,404 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 09:21:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:53,407 INFO L225 Difference]: With dead ends: 3816 [2020-11-12 09:21:53,407 INFO L226 Difference]: Without dead ends: 3482 [2020-11-12 09:21:53,407 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=894, Invalid=2766, Unknown=0, NotChecked=0, Total=3660 [2020-11-12 09:21:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-11-12 09:21:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 1944. [2020-11-12 09:21:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1832 states have (on average 1.2570960698689957) internal successors, (2303), 1943 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 09:21:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 2303 transitions. [2020-11-12 09:21:53,431 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 2303 transitions. Word has length 58 [2020-11-12 09:21:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:53,431 INFO L481 AbstractCegarLoop]: Abstraction has 1944 states and 2303 transitions. [2020-11-12 09:21:53,431 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 09:21:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 2303 transitions. [2020-11-12 09:21:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:53,432 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:53,432 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 09:21:53,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-12 09:21:53,633 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1752838913, now seen corresponding path program 26 times [2020-11-12 09:21:53,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:53,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352488302] [2020-11-12 09:21:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:53,838 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 09:21:53,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352488302] [2020-11-12 09:21:53,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298326473] [2020-11-12 09:21:53,839 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 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 09:21:53,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:53,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:53,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:54,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:54,231 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 09:21:54,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:54,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:54,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731254328] [2020-11-12 09:21:54,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:54,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:54,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:54,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:54,232 INFO L87 Difference]: Start difference. First operand 1944 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 09:21:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:56,038 INFO L93 Difference]: Finished difference Result 3507 states and 4102 transitions. [2020-11-12 09:21:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 09:21:56,039 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 09:21:56,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:56,042 INFO L225 Difference]: With dead ends: 3507 [2020-11-12 09:21:56,042 INFO L226 Difference]: Without dead ends: 3349 [2020-11-12 09:21:56,043 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 09:21:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2020-11-12 09:21:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 1940. [2020-11-12 09:21:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1828 states have (on average 1.2549234135667395) internal successors, (2294), 1939 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 2294 transitions. [2020-11-12 09:21:56,065 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 2294 transitions. Word has length 58 [2020-11-12 09:21:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:56,065 INFO L481 AbstractCegarLoop]: Abstraction has 1940 states and 2294 transitions. [2020-11-12 09:21:56,065 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 09:21:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 2294 transitions. [2020-11-12 09:21:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:56,066 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:56,067 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 09:21:56,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:56,267 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash -483392673, now seen corresponding path program 27 times [2020-11-12 09:21:56,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:56,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344371942] [2020-11-12 09:21:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:56,447 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 09:21:56,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344371942] [2020-11-12 09:21:56,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803503657] [2020-11-12 09:21:56,448 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 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 09:21:56,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:21:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:56,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:56,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:56,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:56,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:56,893 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 09:21:56,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:56,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940770112] [2020-11-12 09:21:56,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:56,894 INFO L87 Difference]: Start difference. First operand 1940 states and 2294 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 09:21:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:58,829 INFO L93 Difference]: Finished difference Result 3837 states and 4448 transitions. [2020-11-12 09:21:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 09:21:58,830 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 09:21:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:58,833 INFO L225 Difference]: With dead ends: 3837 [2020-11-12 09:21:58,834 INFO L226 Difference]: Without dead ends: 3679 [2020-11-12 09:21:58,834 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=662, Invalid=2200, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:21:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2020-11-12 09:21:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 1956. [2020-11-12 09:21:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1844 states have (on average 1.2608459869848156) internal successors, (2325), 1955 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2325 transitions. [2020-11-12 09:21:58,859 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2325 transitions. Word has length 58 [2020-11-12 09:21:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:58,860 INFO L481 AbstractCegarLoop]: Abstraction has 1956 states and 2325 transitions. [2020-11-12 09:21:58,860 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 09:21:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2325 transitions. [2020-11-12 09:21:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:58,861 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:58,861 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 09:21:59,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-12 09:21:59,062 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1772920041, now seen corresponding path program 28 times [2020-11-12 09:21:59,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:59,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051403666] [2020-11-12 09:21:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:59,274 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 09:21:59,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051403666] [2020-11-12 09:21:59,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223388512] [2020-11-12 09:21:59,274 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 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 09:21:59,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:59,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:21:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:59,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:59,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:59,682 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 09:21:59,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:59,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:21:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25228451] [2020-11-12 09:21:59,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:21:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:21:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:21:59,684 INFO L87 Difference]: Start difference. First operand 1956 states and 2325 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 09:22:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:02,382 INFO L93 Difference]: Finished difference Result 3878 states and 4514 transitions. [2020-11-12 09:22:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 09:22:02,383 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 09:22:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:02,386 INFO L225 Difference]: With dead ends: 3878 [2020-11-12 09:22:02,386 INFO L226 Difference]: Without dead ends: 3544 [2020-11-12 09:22:02,387 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1053, Invalid=3237, Unknown=0, NotChecked=0, Total=4290 [2020-11-12 09:22:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2020-11-12 09:22:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 1968. [2020-11-12 09:22:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1856 states have (on average 1.2607758620689655) internal successors, (2340), 1967 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2340 transitions. [2020-11-12 09:22:02,413 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2340 transitions. Word has length 58 [2020-11-12 09:22:02,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:02,413 INFO L481 AbstractCegarLoop]: Abstraction has 1968 states and 2340 transitions. [2020-11-12 09:22:02,413 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 09:22:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2340 transitions. [2020-11-12 09:22:02,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:02,415 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:02,415 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 09:22:02,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-12 09:22:02,615 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:02,616 INFO L82 PathProgramCache]: Analyzing trace with hash -749606263, now seen corresponding path program 29 times [2020-11-12 09:22:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:02,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880690218] [2020-11-12 09:22:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:02,822 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 09:22:02,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880690218] [2020-11-12 09:22:02,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188666552] [2020-11-12 09:22:02,822 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 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 09:22:02,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:22:02,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:02,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:03,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:03,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:03,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:03,313 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 09:22:03,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:03,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:03,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33678676] [2020-11-12 09:22:03,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:03,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:03,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:03,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:03,315 INFO L87 Difference]: Start difference. First operand 1968 states and 2340 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 09:22:05,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:05,375 INFO L93 Difference]: Finished difference Result 3504 states and 4113 transitions. [2020-11-12 09:22:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 09:22:05,376 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 09:22:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:05,378 INFO L225 Difference]: With dead ends: 3504 [2020-11-12 09:22:05,378 INFO L226 Difference]: Without dead ends: 3346 [2020-11-12 09:22:05,379 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=762, Invalid=2430, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 09:22:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2020-11-12 09:22:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 1958. [2020-11-12 09:22:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1846 states have (on average 1.2589382448537378) internal successors, (2324), 1957 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2324 transitions. [2020-11-12 09:22:05,403 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2324 transitions. Word has length 58 [2020-11-12 09:22:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:05,403 INFO L481 AbstractCegarLoop]: Abstraction has 1958 states and 2324 transitions. [2020-11-12 09:22:05,404 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 09:22:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2324 transitions. [2020-11-12 09:22:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:05,405 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:05,405 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 09:22:05,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-12 09:22:05,609 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 457754879, now seen corresponding path program 30 times [2020-11-12 09:22:05,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:05,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514842595] [2020-11-12 09:22:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:05,822 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 09:22:05,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514842595] [2020-11-12 09:22:05,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762539954] [2020-11-12 09:22:05,823 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 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 09:22:05,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:22:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:05,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:06,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:06,214 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 09:22:06,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:06,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:06,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791783733] [2020-11-12 09:22:06,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:06,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:06,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:06,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:06,216 INFO L87 Difference]: Start difference. First operand 1958 states and 2324 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 09:22:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:07,810 INFO L93 Difference]: Finished difference Result 3943 states and 4529 transitions. [2020-11-12 09:22:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 09:22:07,811 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 09:22:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:07,815 INFO L225 Difference]: With dead ends: 3943 [2020-11-12 09:22:07,815 INFO L226 Difference]: Without dead ends: 3785 [2020-11-12 09:22:07,815 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=550, Invalid=1900, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 09:22:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-11-12 09:22:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 1956. [2020-11-12 09:22:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1844 states have (on average 1.2603036876355749) internal successors, (2324), 1955 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2324 transitions. [2020-11-12 09:22:07,841 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2324 transitions. Word has length 58 [2020-11-12 09:22:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:07,841 INFO L481 AbstractCegarLoop]: Abstraction has 1956 states and 2324 transitions. [2020-11-12 09:22:07,841 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 09:22:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2324 transitions. [2020-11-12 09:22:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:07,843 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:07,843 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 09:22:08,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-12 09:22:08,044 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash 425646153, now seen corresponding path program 31 times [2020-11-12 09:22:08,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:08,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825122607] [2020-11-12 09:22:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:08,248 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 09:22:08,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825122607] [2020-11-12 09:22:08,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529733743] [2020-11-12 09:22:08,249 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 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 09:22:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:08,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:08,615 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 09:22:08,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:08,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784153314] [2020-11-12 09:22:08,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:08,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:08,616 INFO L87 Difference]: Start difference. First operand 1956 states and 2324 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 09:22:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:10,078 INFO L93 Difference]: Finished difference Result 3644 states and 4267 transitions. [2020-11-12 09:22:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-12 09:22:10,079 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 09:22:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:10,084 INFO L225 Difference]: With dead ends: 3644 [2020-11-12 09:22:10,084 INFO L226 Difference]: Without dead ends: 3486 [2020-11-12 09:22:10,085 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:22:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2020-11-12 09:22:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 1941. [2020-11-12 09:22:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1829 states have (on average 1.2525970475669765) internal successors, (2291), 1940 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 09:22:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2291 transitions. [2020-11-12 09:22:10,124 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2291 transitions. Word has length 58 [2020-11-12 09:22:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:10,124 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 2291 transitions. [2020-11-12 09:22:10,124 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 09:22:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2291 transitions. [2020-11-12 09:22:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:10,126 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:10,126 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 09:22:10,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:10,336 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash 169000843, now seen corresponding path program 32 times [2020-11-12 09:22:10,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:10,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482699046] [2020-11-12 09:22:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:10,537 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 09:22:10,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482699046] [2020-11-12 09:22:10,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291837397] [2020-11-12 09:22:10,538 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 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 09:22:10,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:22:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:10,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:10,942 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 09:22:10,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:10,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:10,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444822762] [2020-11-12 09:22:10,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:10,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:10,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:10,943 INFO L87 Difference]: Start difference. First operand 1941 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 09:22:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:12,488 INFO L93 Difference]: Finished difference Result 3839 states and 4446 transitions. [2020-11-12 09:22:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:22:12,489 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 09:22:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:12,493 INFO L225 Difference]: With dead ends: 3839 [2020-11-12 09:22:12,493 INFO L226 Difference]: Without dead ends: 3681 [2020-11-12 09:22:12,494 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 09:22:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2020-11-12 09:22:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 1937. [2020-11-12 09:22:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1825 states have (on average 1.2504109589041097) internal successors, (2282), 1936 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2282 transitions. [2020-11-12 09:22:12,520 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2282 transitions. Word has length 58 [2020-11-12 09:22:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:12,520 INFO L481 AbstractCegarLoop]: Abstraction has 1937 states and 2282 transitions. [2020-11-12 09:22:12,520 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 09:22:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2282 transitions. [2020-11-12 09:22:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:12,522 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:12,522 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 09:22:12,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:12,723 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash -644134891, now seen corresponding path program 33 times [2020-11-12 09:22:12,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:12,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787674706] [2020-11-12 09:22:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:12,928 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 09:22:12,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787674706] [2020-11-12 09:22:12,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888818447] [2020-11-12 09:22:12,929 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 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 09:22:13,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:22:13,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:13,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:13,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:13,263 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 09:22:13,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:13,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:22:13,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889102053] [2020-11-12 09:22:13,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:22:13,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:13,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:22:13,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:22:13,264 INFO L87 Difference]: Start difference. First operand 1937 states and 2282 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 09:22:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:16,098 INFO L93 Difference]: Finished difference Result 3684 states and 4261 transitions. [2020-11-12 09:22:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-12 09:22:16,099 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 09:22:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:16,103 INFO L225 Difference]: With dead ends: 3684 [2020-11-12 09:22:16,103 INFO L226 Difference]: Without dead ends: 3350 [2020-11-12 09:22:16,104 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1131, Invalid=3561, Unknown=0, NotChecked=0, Total=4692 [2020-11-12 09:22:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2020-11-12 09:22:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1947. [2020-11-12 09:22:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1835 states have (on average 1.2501362397820164) internal successors, (2294), 1946 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2294 transitions. [2020-11-12 09:22:16,131 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2294 transitions. Word has length 58 [2020-11-12 09:22:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:16,131 INFO L481 AbstractCegarLoop]: Abstraction has 1947 states and 2294 transitions. [2020-11-12 09:22:16,132 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 09:22:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2294 transitions. [2020-11-12 09:22:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:16,133 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:16,133 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 09:22:16,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-12 09:22:16,334 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1128306101, now seen corresponding path program 34 times [2020-11-12 09:22:16,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:16,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297755782] [2020-11-12 09:22:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:16,563 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 09:22:16,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297755782] [2020-11-12 09:22:16,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885653660] [2020-11-12 09:22:16,564 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 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 09:22:16,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:22:16,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:22:16,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:16,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:16,951 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 09:22:16,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:16,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:16,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740724213] [2020-11-12 09:22:16,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:16,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:16,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:16,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:16,953 INFO L87 Difference]: Start difference. First operand 1947 states and 2294 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 09:22:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:19,055 INFO L93 Difference]: Finished difference Result 3417 states and 3990 transitions. [2020-11-12 09:22:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 09:22:19,056 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 09:22:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:19,059 INFO L225 Difference]: With dead ends: 3417 [2020-11-12 09:22:19,059 INFO L226 Difference]: Without dead ends: 3259 [2020-11-12 09:22:19,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 09:22:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2020-11-12 09:22:19,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 1947. [2020-11-12 09:22:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1835 states have (on average 1.2501362397820164) internal successors, (2294), 1946 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2294 transitions. [2020-11-12 09:22:19,085 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2294 transitions. Word has length 58 [2020-11-12 09:22:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:19,085 INFO L481 AbstractCegarLoop]: Abstraction has 1947 states and 2294 transitions. [2020-11-12 09:22:19,085 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 09:22:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2294 transitions. [2020-11-12 09:22:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:19,087 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:19,087 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 09:22:19,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:19,288 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1897214955, now seen corresponding path program 35 times [2020-11-12 09:22:19,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:19,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069777587] [2020-11-12 09:22:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:19,502 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 09:22:19,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069777587] [2020-11-12 09:22:19,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573624882] [2020-11-12 09:22:19,503 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 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 09:22:19,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:22:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:19,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:19,919 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 09:22:19,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:19,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:19,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080053916] [2020-11-12 09:22:19,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:19,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:19,920 INFO L87 Difference]: Start difference. First operand 1947 states and 2294 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 09:22:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:21,615 INFO L93 Difference]: Finished difference Result 3596 states and 4160 transitions. [2020-11-12 09:22:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 09:22:21,617 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 09:22:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:21,620 INFO L225 Difference]: With dead ends: 3596 [2020-11-12 09:22:21,620 INFO L226 Difference]: Without dead ends: 3438 [2020-11-12 09:22:21,621 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=609, Invalid=2043, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:22:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2020-11-12 09:22:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 1941. [2020-11-12 09:22:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1829 states have (on average 1.249316566429743) internal successors, (2285), 1940 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2285 transitions. [2020-11-12 09:22:21,646 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2285 transitions. Word has length 58 [2020-11-12 09:22:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:21,646 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 2285 transitions. [2020-11-12 09:22:21,646 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 09:22:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2285 transitions. [2020-11-12 09:22:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:21,648 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:21,648 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 09:22:21,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-12 09:22:21,849 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1972536875, now seen corresponding path program 10 times [2020-11-12 09:22:21,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:21,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782243197] [2020-11-12 09:22:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:22,122 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 09:22:22,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782243197] [2020-11-12 09:22:22,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271988237] [2020-11-12 09:22:22,122 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 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 09:22:22,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:22:22,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:22:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:22,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:22,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:22,471 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 09:22:22,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:22,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:22,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766789883] [2020-11-12 09:22:22,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:22,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:22,473 INFO L87 Difference]: Start difference. First operand 1941 states and 2285 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 09:22:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:24,601 INFO L93 Difference]: Finished difference Result 4114 states and 4792 transitions. [2020-11-12 09:22:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 09:22:24,603 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 09:22:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:24,607 INFO L225 Difference]: With dead ends: 4114 [2020-11-12 09:22:24,607 INFO L226 Difference]: Without dead ends: 3508 [2020-11-12 09:22:24,608 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=895, Invalid=3137, Unknown=0, NotChecked=0, Total=4032 [2020-11-12 09:22:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2020-11-12 09:22:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 1951. [2020-11-12 09:22:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1839 states have (on average 1.2544861337683524) internal successors, (2307), 1950 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2307 transitions. [2020-11-12 09:22:24,634 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2307 transitions. Word has length 58 [2020-11-12 09:22:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:24,634 INFO L481 AbstractCegarLoop]: Abstraction has 1951 states and 2307 transitions. [2020-11-12 09:22:24,634 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 09:22:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2307 transitions. [2020-11-12 09:22:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:24,636 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:24,636 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 09:22:24,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-12 09:22:24,837 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1363746177, now seen corresponding path program 36 times [2020-11-12 09:22:24,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:24,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105160403] [2020-11-12 09:22:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:25,090 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 09:22:25,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105160403] [2020-11-12 09:22:25,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556509472] [2020-11-12 09:22:25,091 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 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 09:22:25,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:22:25,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:25,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:25,439 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 09:22:25,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:25,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:25,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303750507] [2020-11-12 09:22:25,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:25,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:25,441 INFO L87 Difference]: Start difference. First operand 1951 states and 2307 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 09:22:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:26,295 INFO L93 Difference]: Finished difference Result 3584 states and 4188 transitions. [2020-11-12 09:22:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 09:22:26,297 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 09:22:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:26,300 INFO L225 Difference]: With dead ends: 3584 [2020-11-12 09:22:26,300 INFO L226 Difference]: Without dead ends: 3426 [2020-11-12 09:22:26,301 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:22:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2020-11-12 09:22:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1956. [2020-11-12 09:22:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1844 states have (on average 1.2570498915401302) internal successors, (2318), 1955 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2318 transitions. [2020-11-12 09:22:26,326 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2318 transitions. Word has length 58 [2020-11-12 09:22:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:26,326 INFO L481 AbstractCegarLoop]: Abstraction has 1956 states and 2318 transitions. [2020-11-12 09:22:26,326 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 09:22:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2318 transitions. [2020-11-12 09:22:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:26,328 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:26,328 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 09:22:26,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-12 09:22:26,528 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:26,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2140056337, now seen corresponding path program 37 times [2020-11-12 09:22:26,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:26,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551864561] [2020-11-12 09:22:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:26,751 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 09:22:26,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551864561] [2020-11-12 09:22:26,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623587152] [2020-11-12 09:22:26,751 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 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 09:22:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:26,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:27,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:27,187 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 09:22:27,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:27,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:27,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863997082] [2020-11-12 09:22:27,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:27,189 INFO L87 Difference]: Start difference. First operand 1956 states and 2318 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 09:22:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:28,230 INFO L93 Difference]: Finished difference Result 3623 states and 4227 transitions. [2020-11-12 09:22:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:22:28,231 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 09:22:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:28,234 INFO L225 Difference]: With dead ends: 3623 [2020-11-12 09:22:28,235 INFO L226 Difference]: Without dead ends: 3465 [2020-11-12 09:22:28,235 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=362, Invalid=1198, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 09:22:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2020-11-12 09:22:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 1946. [2020-11-12 09:22:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1834 states have (on average 1.2546346782988005) internal successors, (2301), 1945 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 09:22:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2301 transitions. [2020-11-12 09:22:28,261 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2301 transitions. Word has length 58 [2020-11-12 09:22:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:28,261 INFO L481 AbstractCegarLoop]: Abstraction has 1946 states and 2301 transitions. [2020-11-12 09:22:28,261 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 09:22:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2301 transitions. [2020-11-12 09:22:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:28,263 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:28,264 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 09:22:28,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-12 09:22:28,476 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1754719485, now seen corresponding path program 38 times [2020-11-12 09:22:28,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:28,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251116526] [2020-11-12 09:22:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:28,703 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 09:22:28,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251116526] [2020-11-12 09:22:28,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334505411] [2020-11-12 09:22:28,703 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 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 09:22:28,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:22:28,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:28,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:28,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:29,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:29,058 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 09:22:29,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:29,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:29,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786430568] [2020-11-12 09:22:29,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:29,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:29,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:29,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:29,060 INFO L87 Difference]: Start difference. First operand 1946 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 09:22:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:30,383 INFO L93 Difference]: Finished difference Result 3700 states and 4313 transitions. [2020-11-12 09:22:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:22:30,384 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 09:22:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:30,387 INFO L225 Difference]: With dead ends: 3700 [2020-11-12 09:22:30,387 INFO L226 Difference]: Without dead ends: 3542 [2020-11-12 09:22:30,387 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:22:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2020-11-12 09:22:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 1947. [2020-11-12 09:22:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1835 states have (on average 1.255040871934605) internal successors, (2303), 1946 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 09:22:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2303 transitions. [2020-11-12 09:22:30,410 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2303 transitions. Word has length 58 [2020-11-12 09:22:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:30,410 INFO L481 AbstractCegarLoop]: Abstraction has 1947 states and 2303 transitions. [2020-11-12 09:22:30,411 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 09:22:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2303 transitions. [2020-11-12 09:22:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:30,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:30,412 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 09:22:30,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-12 09:22:30,613 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash 501593229, now seen corresponding path program 39 times [2020-11-12 09:22:30,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:30,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424188419] [2020-11-12 09:22:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:30,833 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 09:22:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424188419] [2020-11-12 09:22:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928385991] [2020-11-12 09:22:30,834 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 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 09:22:30,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:22:30,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:30,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:30,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:31,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:31,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:31,161 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 09:22:31,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:31,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 09:22:31,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319801446] [2020-11-12 09:22:31,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:22:31,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:31,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:22:31,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:22:31,163 INFO L87 Difference]: Start difference. First operand 1947 states and 2303 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 09:22:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:33,106 INFO L93 Difference]: Finished difference Result 4023 states and 4649 transitions. [2020-11-12 09:22:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 09:22:33,107 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 09:22:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:33,109 INFO L225 Difference]: With dead ends: 4023 [2020-11-12 09:22:33,109 INFO L226 Difference]: Without dead ends: 3689 [2020-11-12 09:22:33,110 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=833, Invalid=2589, Unknown=0, NotChecked=0, Total=3422 [2020-11-12 09:22:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2020-11-12 09:22:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 1953. [2020-11-12 09:22:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1841 states have (on average 1.254209668658338) internal successors, (2309), 1952 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2309 transitions. [2020-11-12 09:22:33,132 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2309 transitions. Word has length 58 [2020-11-12 09:22:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:33,133 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 2309 transitions. [2020-11-12 09:22:33,133 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 09:22:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2309 transitions. [2020-11-12 09:22:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:33,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:33,134 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 09:22:33,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:33,335 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2020933075, now seen corresponding path program 40 times [2020-11-12 09:22:33,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:33,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408355461] [2020-11-12 09:22:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:33,548 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 09:22:33,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408355461] [2020-11-12 09:22:33,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047437853] [2020-11-12 09:22:33,549 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 09:22:33,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:22:33,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:22:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:33,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:33,932 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 09:22:33,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:33,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:33,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595636043] [2020-11-12 09:22:33,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:33,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:33,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:33,934 INFO L87 Difference]: Start difference. First operand 1953 states and 2309 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 09:22:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:35,323 INFO L93 Difference]: Finished difference Result 3635 states and 4264 transitions. [2020-11-12 09:22:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:22:35,324 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 09:22:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:35,328 INFO L225 Difference]: With dead ends: 3635 [2020-11-12 09:22:35,328 INFO L226 Difference]: Without dead ends: 3477 [2020-11-12 09:22:35,328 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 09:22:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3477 states. [2020-11-12 09:22:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3477 to 1960. [2020-11-12 09:22:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1848 states have (on average 1.2554112554112553) internal successors, (2320), 1959 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2320 transitions. [2020-11-12 09:22:35,356 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2320 transitions. Word has length 58 [2020-11-12 09:22:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:35,356 INFO L481 AbstractCegarLoop]: Abstraction has 1960 states and 2320 transitions. [2020-11-12 09:22:35,357 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 09:22:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2320 transitions. [2020-11-12 09:22:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:35,359 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:35,359 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 09:22:35,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:35,573 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1202505116, now seen corresponding path program 11 times [2020-11-12 09:22:35,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:35,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144462501] [2020-11-12 09:22:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:35,828 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 09:22:35,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144462501] [2020-11-12 09:22:35,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729844641] [2020-11-12 09:22:35,829 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 09:22:35,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-12 09:22:35,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:35,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:36,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:36,291 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 09:22:36,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:36,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:36,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343586546] [2020-11-12 09:22:36,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:36,293 INFO L87 Difference]: Start difference. First operand 1960 states and 2320 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 09:22:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:36,797 INFO L93 Difference]: Finished difference Result 3153 states and 3704 transitions. [2020-11-12 09:22:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 09:22:36,798 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 09:22:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:36,801 INFO L225 Difference]: With dead ends: 3153 [2020-11-12 09:22:36,802 INFO L226 Difference]: Without dead ends: 2995 [2020-11-12 09:22:36,802 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2020-11-12 09:22:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2020-11-12 09:22:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1969. [2020-11-12 09:22:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1857 states have (on average 1.2579429186860527) internal successors, (2336), 1968 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:36,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2336 transitions. [2020-11-12 09:22:36,824 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2336 transitions. Word has length 63 [2020-11-12 09:22:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:36,824 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 2336 transitions. [2020-11-12 09:22:36,824 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 09:22:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2336 transitions. [2020-11-12 09:22:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:36,826 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:36,826 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 09:22:37,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-11-12 09:22:37,028 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash 271191330, now seen corresponding path program 12 times [2020-11-12 09:22:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:37,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407333844] [2020-11-12 09:22:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:37,310 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 09:22:37,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407333844] [2020-11-12 09:22:37,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587899938] [2020-11-12 09:22:37,310 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 09:22:37,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-12 09:22:37,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:37,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:37,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:37,792 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 09:22:37,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:37,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:37,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990350949] [2020-11-12 09:22:37,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:37,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:37,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:37,794 INFO L87 Difference]: Start difference. First operand 1969 states and 2336 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 09:22:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:39,571 INFO L93 Difference]: Finished difference Result 4262 states and 4969 transitions. [2020-11-12 09:22:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:22:39,572 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 09:22:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:39,575 INFO L225 Difference]: With dead ends: 4262 [2020-11-12 09:22:39,575 INFO L226 Difference]: Without dead ends: 3656 [2020-11-12 09:22:39,575 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=595, Invalid=2267, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:22:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2020-11-12 09:22:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 1973. [2020-11-12 09:22:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1861 states have (on average 1.2573885008060182) internal successors, (2340), 1972 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2340 transitions. [2020-11-12 09:22:39,601 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2340 transitions. Word has length 63 [2020-11-12 09:22:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:39,602 INFO L481 AbstractCegarLoop]: Abstraction has 1973 states and 2340 transitions. [2020-11-12 09:22:39,602 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 09:22:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2340 transitions. [2020-11-12 09:22:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:39,604 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:39,604 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 09:22:39,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:39,805 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash -457503288, now seen corresponding path program 41 times [2020-11-12 09:22:39,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:39,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631382382] [2020-11-12 09:22:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:40,118 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 09:22:40,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631382382] [2020-11-12 09:22:40,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762723375] [2020-11-12 09:22:40,119 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 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 09:22:40,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:22:40,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:40,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:40,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:40,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:40,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:40,648 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 09:22:40,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:40,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:40,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043247798] [2020-11-12 09:22:40,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:40,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:40,650 INFO L87 Difference]: Start difference. First operand 1973 states and 2340 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 09:22:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:43,075 INFO L93 Difference]: Finished difference Result 4388 states and 5114 transitions. [2020-11-12 09:22:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 09:22:43,076 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 09:22:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:43,082 INFO L225 Difference]: With dead ends: 4388 [2020-11-12 09:22:43,082 INFO L226 Difference]: Without dead ends: 3782 [2020-11-12 09:22:43,083 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=764, Invalid=2896, Unknown=0, NotChecked=0, Total=3660 [2020-11-12 09:22:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2020-11-12 09:22:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 1983. [2020-11-12 09:22:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1871 states have (on average 1.2570817744521645) internal successors, (2352), 1982 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 2352 transitions. [2020-11-12 09:22:43,114 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 2352 transitions. Word has length 63 [2020-11-12 09:22:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:43,115 INFO L481 AbstractCegarLoop]: Abstraction has 1983 states and 2352 transitions. [2020-11-12 09:22:43,115 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 09:22:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 2352 transitions. [2020-11-12 09:22:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:43,117 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:43,117 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 09:22:43,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-12 09:22:43,318 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:43,319 INFO L82 PathProgramCache]: Analyzing trace with hash 85740146, now seen corresponding path program 42 times [2020-11-12 09:22:43,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:43,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398221478] [2020-11-12 09:22:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:43,585 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 09:22:43,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398221478] [2020-11-12 09:22:43,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106653799] [2020-11-12 09:22:43,586 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 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 09:22:43,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:22:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:43,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:44,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:44,149 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 09:22:44,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:44,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130502529] [2020-11-12 09:22:44,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:44,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:44,151 INFO L87 Difference]: Start difference. First operand 1983 states and 2352 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 09:22:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:45,752 INFO L93 Difference]: Finished difference Result 3821 states and 4457 transitions. [2020-11-12 09:22:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 09:22:45,753 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 09:22:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:45,758 INFO L225 Difference]: With dead ends: 3821 [2020-11-12 09:22:45,758 INFO L226 Difference]: Without dead ends: 3663 [2020-11-12 09:22:45,759 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=453, Invalid=1527, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 09:22:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2020-11-12 09:22:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 1983. [2020-11-12 09:22:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1871 states have (on average 1.2570817744521645) internal successors, (2352), 1982 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 2352 transitions. [2020-11-12 09:22:45,792 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 2352 transitions. Word has length 63 [2020-11-12 09:22:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:45,793 INFO L481 AbstractCegarLoop]: Abstraction has 1983 states and 2352 transitions. [2020-11-12 09:22:45,793 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 09:22:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 2352 transitions. [2020-11-12 09:22:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:45,796 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:45,796 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 09:22:46,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:46,010 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1578009826, now seen corresponding path program 43 times [2020-11-12 09:22:46,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:46,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504611038] [2020-11-12 09:22:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:46,334 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 09:22:46,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504611038] [2020-11-12 09:22:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927304787] [2020-11-12 09:22:46,335 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 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 09:22:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:46,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:46,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:46,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:46,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:46,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:46,955 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 09:22:46,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:46,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:46,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616748356] [2020-11-12 09:22:46,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:46,959 INFO L87 Difference]: Start difference. First operand 1983 states and 2352 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 09:22:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:50,384 INFO L93 Difference]: Finished difference Result 4541 states and 5310 transitions. [2020-11-12 09:22:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-12 09:22:50,385 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 09:22:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:50,390 INFO L225 Difference]: With dead ends: 4541 [2020-11-12 09:22:50,390 INFO L226 Difference]: Without dead ends: 3935 [2020-11-12 09:22:50,390 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1072, Invalid=3898, Unknown=0, NotChecked=0, Total=4970 [2020-11-12 09:22:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2020-11-12 09:22:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2008. [2020-11-12 09:22:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 1896 states have (on average 1.259493670886076) internal successors, (2388), 2007 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 2388 transitions. [2020-11-12 09:22:50,418 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 2388 transitions. Word has length 63 [2020-11-12 09:22:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:50,418 INFO L481 AbstractCegarLoop]: Abstraction has 2008 states and 2388 transitions. [2020-11-12 09:22:50,418 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 09:22:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 2388 transitions. [2020-11-12 09:22:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:50,420 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:50,420 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 09:22:50,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-12 09:22:50,625 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 324929762, now seen corresponding path program 44 times [2020-11-12 09:22:50,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:50,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356738918] [2020-11-12 09:22:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:50,892 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 09:22:50,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356738918] [2020-11-12 09:22:50,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303888481] [2020-11-12 09:22:50,893 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 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 09:22:50,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:22:50,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:50,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:51,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:51,482 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 09:22:51,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:51,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:51,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130499026] [2020-11-12 09:22:51,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:51,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:51,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:51,484 INFO L87 Difference]: Start difference. First operand 2008 states and 2388 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 09:22:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:53,607 INFO L93 Difference]: Finished difference Result 3634 states and 4239 transitions. [2020-11-12 09:22:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:22:53,608 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 09:22:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:53,612 INFO L225 Difference]: With dead ends: 3634 [2020-11-12 09:22:53,612 INFO L226 Difference]: Without dead ends: 3476 [2020-11-12 09:22:53,612 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=568, Invalid=2084, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:22:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2020-11-12 09:22:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2009. [2020-11-12 09:22:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1897 states have (on average 1.2598840274117027) internal successors, (2390), 2008 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2390 transitions. [2020-11-12 09:22:53,637 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2390 transitions. Word has length 63 [2020-11-12 09:22:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:53,637 INFO L481 AbstractCegarLoop]: Abstraction has 2009 states and 2390 transitions. [2020-11-12 09:22:53,637 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 09:22:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2390 transitions. [2020-11-12 09:22:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:53,639 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:53,639 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 09:22:53,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:53,839 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1713724820, now seen corresponding path program 45 times [2020-11-12 09:22:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:53,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768469600] [2020-11-12 09:22:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:54,129 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 09:22:54,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768469600] [2020-11-12 09:22:54,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007370664] [2020-11-12 09:22:54,129 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 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 09:22:54,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:22:54,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:54,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:54,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:54,727 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 09:22:54,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:54,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:54,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046898998] [2020-11-12 09:22:54,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:54,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:54,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:54,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:54,729 INFO L87 Difference]: Start difference. First operand 2009 states and 2390 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 09:22:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:58,046 INFO L93 Difference]: Finished difference Result 4453 states and 5191 transitions. [2020-11-12 09:22:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-12 09:22:58,048 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 09:22:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:58,051 INFO L225 Difference]: With dead ends: 4453 [2020-11-12 09:22:58,051 INFO L226 Difference]: Without dead ends: 3847 [2020-11-12 09:22:58,052 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1049, Invalid=3781, Unknown=0, NotChecked=0, Total=4830 [2020-11-12 09:22:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3847 states. [2020-11-12 09:22:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3847 to 2011. [2020-11-12 09:22:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 1899 states have (on average 1.261716692996314) internal successors, (2396), 2010 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 2396 transitions. [2020-11-12 09:22:58,092 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 2396 transitions. Word has length 63 [2020-11-12 09:22:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:58,092 INFO L481 AbstractCegarLoop]: Abstraction has 2011 states and 2396 transitions. [2020-11-12 09:22:58,092 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 09:22:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 2396 transitions. [2020-11-12 09:22:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:58,094 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:58,095 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 09:22:58,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-12 09:22:58,308 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash 428580378, now seen corresponding path program 46 times [2020-11-12 09:22:58,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:58,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106719579] [2020-11-12 09:22:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:58,603 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 09:22:58,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106719579] [2020-11-12 09:22:58,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209228895] [2020-11-12 09:22:58,604 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 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 09:22:58,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:22:58,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:59,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:59,241 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 09:22:59,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:59,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:59,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824555253] [2020-11-12 09:22:59,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:59,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:59,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:59,243 INFO L87 Difference]: Start difference. First operand 2011 states and 2396 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 09:23:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:01,117 INFO L93 Difference]: Finished difference Result 4082 states and 4772 transitions. [2020-11-12 09:23:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 09:23:01,118 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 09:23:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:01,121 INFO L225 Difference]: With dead ends: 4082 [2020-11-12 09:23:01,122 INFO L226 Difference]: Without dead ends: 3924 [2020-11-12 09:23:01,122 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=519, Invalid=1643, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:23:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3924 states. [2020-11-12 09:23:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3924 to 2025. [2020-11-12 09:23:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 1913 states have (on average 1.266074228959749) internal successors, (2422), 2024 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 2422 transitions. [2020-11-12 09:23:01,147 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 2422 transitions. Word has length 63 [2020-11-12 09:23:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:01,147 INFO L481 AbstractCegarLoop]: Abstraction has 2025 states and 2422 transitions. [2020-11-12 09:23:01,147 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 09:23:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 2422 transitions. [2020-11-12 09:23:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:01,148 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:01,148 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 09:23:01,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-12 09:23:01,349 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:01,350 INFO L82 PathProgramCache]: Analyzing trace with hash -574945128, now seen corresponding path program 47 times [2020-11-12 09:23:01,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:01,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902710475] [2020-11-12 09:23:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:01,628 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 09:23:01,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902710475] [2020-11-12 09:23:01,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968391267] [2020-11-12 09:23:01,628 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 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 09:23:01,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:23:01,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:02,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:02,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:02,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:02,260 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 09:23:02,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:02,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:02,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659016941] [2020-11-12 09:23:02,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:02,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:02,262 INFO L87 Difference]: Start difference. First operand 2025 states and 2422 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 09:23:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:03,913 INFO L93 Difference]: Finished difference Result 3645 states and 4306 transitions. [2020-11-12 09:23:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 09:23:03,914 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 09:23:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:03,917 INFO L225 Difference]: With dead ends: 3645 [2020-11-12 09:23:03,917 INFO L226 Difference]: Without dead ends: 3487 [2020-11-12 09:23:03,918 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 09:23:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2020-11-12 09:23:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 2015. [2020-11-12 09:23:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 1903 states have (on average 1.2611665790856543) internal successors, (2400), 2014 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2400 transitions. [2020-11-12 09:23:03,941 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2400 transitions. Word has length 63 [2020-11-12 09:23:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:03,941 INFO L481 AbstractCegarLoop]: Abstraction has 2015 states and 2400 transitions. [2020-11-12 09:23:03,941 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 09:23:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2400 transitions. [2020-11-12 09:23:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:03,942 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:03,942 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 09:23:04,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:04,143 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:04,144 INFO L82 PathProgramCache]: Analyzing trace with hash -39096824, now seen corresponding path program 48 times [2020-11-12 09:23:04,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:04,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774226878] [2020-11-12 09:23:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:04,457 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 09:23:04,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774226878] [2020-11-12 09:23:04,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939379251] [2020-11-12 09:23:04,458 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 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 09:23:04,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:23:04,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:04,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:04,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:04,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:04,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:04,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:05,065 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 09:23:05,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:05,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285933120] [2020-11-12 09:23:05,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:05,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:05,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:05,067 INFO L87 Difference]: Start difference. First operand 2015 states and 2400 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 09:23:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:09,443 INFO L93 Difference]: Finished difference Result 4864 states and 5670 transitions. [2020-11-12 09:23:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-12 09:23:09,444 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 09:23:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:09,449 INFO L225 Difference]: With dead ends: 4864 [2020-11-12 09:23:09,449 INFO L226 Difference]: Without dead ends: 4106 [2020-11-12 09:23:09,450 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1229, Invalid=4623, Unknown=0, NotChecked=0, Total=5852 [2020-11-12 09:23:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-11-12 09:23:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 2056. [2020-11-12 09:23:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 1944 states have (on average 1.256687242798354) internal successors, (2443), 2055 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2443 transitions. [2020-11-12 09:23:09,482 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2443 transitions. Word has length 63 [2020-11-12 09:23:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:09,482 INFO L481 AbstractCegarLoop]: Abstraction has 2056 states and 2443 transitions. [2020-11-12 09:23:09,482 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 09:23:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2443 transitions. [2020-11-12 09:23:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:09,484 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:09,484 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 09:23:09,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:09,686 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1292176888, now seen corresponding path program 49 times [2020-11-12 09:23:09,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:09,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548966350] [2020-11-12 09:23:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:09,970 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 09:23:09,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548966350] [2020-11-12 09:23:09,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783870779] [2020-11-12 09:23:09,971 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:10,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:10,693 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 09:23:10,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:10,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:10,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39321899] [2020-11-12 09:23:10,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:10,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:10,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:10,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:10,695 INFO L87 Difference]: Start difference. First operand 2056 states and 2443 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 09:23:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:13,749 INFO L93 Difference]: Finished difference Result 3971 states and 4655 transitions. [2020-11-12 09:23:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 09:23:13,750 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 09:23:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:13,754 INFO L225 Difference]: With dead ends: 3971 [2020-11-12 09:23:13,754 INFO L226 Difference]: Without dead ends: 3813 [2020-11-12 09:23:13,755 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=712, Invalid=2480, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 09:23:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2020-11-12 09:23:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 2057. [2020-11-12 09:23:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 1945 states have (on average 1.25706940874036) internal successors, (2445), 2056 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 2445 transitions. [2020-11-12 09:23:13,783 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 2445 transitions. Word has length 63 [2020-11-12 09:23:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:13,783 INFO L481 AbstractCegarLoop]: Abstraction has 2057 states and 2445 transitions. [2020-11-12 09:23:13,783 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 09:23:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 2445 transitions. [2020-11-12 09:23:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:13,785 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:13,785 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 09:23:13,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:13,986 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash 964135826, now seen corresponding path program 50 times [2020-11-12 09:23:13,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:13,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418880589] [2020-11-12 09:23:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:14,318 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 09:23:14,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418880589] [2020-11-12 09:23:14,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013058513] [2020-11-12 09:23:14,319 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:14,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:23:14,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:14,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:14,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:15,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:15,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:15,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:15,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:15,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:15,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:15,225 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 09:23:15,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:15,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:15,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893670315] [2020-11-12 09:23:15,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:15,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:15,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:15,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:15,227 INFO L87 Difference]: Start difference. First operand 2057 states and 2445 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 09:23:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:20,305 INFO L93 Difference]: Finished difference Result 4673 states and 5452 transitions. [2020-11-12 09:23:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-12 09:23:20,307 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 09:23:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:20,311 INFO L225 Difference]: With dead ends: 4673 [2020-11-12 09:23:20,311 INFO L226 Difference]: Without dead ends: 4067 [2020-11-12 09:23:20,311 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1252, Invalid=4448, Unknown=0, NotChecked=0, Total=5700 [2020-11-12 09:23:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2020-11-12 09:23:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 2070. [2020-11-12 09:23:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1958 states have (on average 1.264555669050051) internal successors, (2476), 2069 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2476 transitions. [2020-11-12 09:23:20,341 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2476 transitions. Word has length 63 [2020-11-12 09:23:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:20,341 INFO L481 AbstractCegarLoop]: Abstraction has 2070 states and 2476 transitions. [2020-11-12 09:23:20,341 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 09:23:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2476 transitions. [2020-11-12 09:23:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:20,342 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:20,343 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 09:23:20,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:20,543 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:20,544 INFO L82 PathProgramCache]: Analyzing trace with hash -351029336, now seen corresponding path program 51 times [2020-11-12 09:23:20,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:20,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906256098] [2020-11-12 09:23:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:20,858 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 09:23:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906256098] [2020-11-12 09:23:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005468175] [2020-11-12 09:23:20,858 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:20,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:23:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:21,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:21,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:21,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:21,539 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 09:23:21,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:21,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:21,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366661265] [2020-11-12 09:23:21,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:21,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:21,541 INFO L87 Difference]: Start difference. First operand 2070 states and 2476 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 09:23:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:24,436 INFO L93 Difference]: Finished difference Result 3987 states and 4616 transitions. [2020-11-12 09:23:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 09:23:24,438 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 09:23:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:24,442 INFO L225 Difference]: With dead ends: 3987 [2020-11-12 09:23:24,442 INFO L226 Difference]: Without dead ends: 3829 [2020-11-12 09:23:24,443 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=659, Invalid=2421, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 09:23:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2020-11-12 09:23:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2070. [2020-11-12 09:23:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1958 states have (on average 1.264555669050051) internal successors, (2476), 2069 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2476 transitions. [2020-11-12 09:23:24,470 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2476 transitions. Word has length 63 [2020-11-12 09:23:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:24,471 INFO L481 AbstractCegarLoop]: Abstraction has 2070 states and 2476 transitions. [2020-11-12 09:23:24,471 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 09:23:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2476 transitions. [2020-11-12 09:23:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:24,472 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:24,472 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 09:23:24,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-12 09:23:24,673 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2013343704, now seen corresponding path program 52 times [2020-11-12 09:23:24,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:24,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509146489] [2020-11-12 09:23:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:24,974 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 09:23:24,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509146489] [2020-11-12 09:23:24,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359861265] [2020-11-12 09:23:24,974 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:25,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:23:25,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:25,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:25,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:25,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:25,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:25,596 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 09:23:25,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:25,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363872524] [2020-11-12 09:23:25,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:25,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:25,598 INFO L87 Difference]: Start difference. First operand 2070 states and 2476 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 09:23:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:27,901 INFO L93 Difference]: Finished difference Result 3814 states and 4505 transitions. [2020-11-12 09:23:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 09:23:27,902 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 09:23:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:27,907 INFO L225 Difference]: With dead ends: 3814 [2020-11-12 09:23:27,907 INFO L226 Difference]: Without dead ends: 3656 [2020-11-12 09:23:27,907 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=587, Invalid=2169, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 09:23:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2020-11-12 09:23:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2065. [2020-11-12 09:23:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1953 states have (on average 1.2621607782898105) internal successors, (2465), 2064 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2465 transitions. [2020-11-12 09:23:27,933 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2465 transitions. Word has length 63 [2020-11-12 09:23:27,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:27,934 INFO L481 AbstractCegarLoop]: Abstraction has 2065 states and 2465 transitions. [2020-11-12 09:23:27,934 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 09:23:27,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2465 transitions. [2020-11-12 09:23:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:27,935 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:27,935 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 09:23:28,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:28,136 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1452919106, now seen corresponding path program 53 times [2020-11-12 09:23:28,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:28,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417003738] [2020-11-12 09:23:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:28,479 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 09:23:28,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417003738] [2020-11-12 09:23:28,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050605027] [2020-11-12 09:23:28,480 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:28,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:23:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:29,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:29,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:29,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:29,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:29,166 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 09:23:29,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:29,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:29,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524420003] [2020-11-12 09:23:29,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:29,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:29,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:29,167 INFO L87 Difference]: Start difference. First operand 2065 states and 2465 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 09:23:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:35,024 INFO L93 Difference]: Finished difference Result 4474 states and 5212 transitions. [2020-11-12 09:23:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-12 09:23:35,026 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 09:23:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:35,030 INFO L225 Difference]: With dead ends: 4474 [2020-11-12 09:23:35,031 INFO L226 Difference]: Without dead ends: 3868 [2020-11-12 09:23:35,031 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1413, Invalid=5067, Unknown=0, NotChecked=0, Total=6480 [2020-11-12 09:23:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2020-11-12 09:23:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2042. [2020-11-12 09:23:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 1930 states have (on average 1.2601036269430053) internal successors, (2432), 2041 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 2432 transitions. [2020-11-12 09:23:35,063 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 2432 transitions. Word has length 63 [2020-11-12 09:23:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:35,063 INFO L481 AbstractCegarLoop]: Abstraction has 2042 states and 2432 transitions. [2020-11-12 09:23:35,064 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 09:23:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 2432 transitions. [2020-11-12 09:23:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:35,065 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:35,065 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 09:23:35,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-12 09:23:35,266 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:35,267 INFO L82 PathProgramCache]: Analyzing trace with hash 215407794, now seen corresponding path program 54 times [2020-11-12 09:23:35,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:35,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071266203] [2020-11-12 09:23:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:35,576 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 09:23:35,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071266203] [2020-11-12 09:23:35,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770190341] [2020-11-12 09:23:35,577 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:35,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-12 09:23:35,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:36,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:36,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:36,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:36,317 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 09:23:36,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:36,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:36,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669487755] [2020-11-12 09:23:36,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:36,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:36,318 INFO L87 Difference]: Start difference. First operand 2042 states and 2432 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 09:23:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:39,143 INFO L93 Difference]: Finished difference Result 3714 states and 4347 transitions. [2020-11-12 09:23:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-12 09:23:39,145 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 09:23:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:39,149 INFO L225 Difference]: With dead ends: 3714 [2020-11-12 09:23:39,149 INFO L226 Difference]: Without dead ends: 3556 [2020-11-12 09:23:39,150 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=688, Invalid=2392, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 09:23:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2020-11-12 09:23:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2037. [2020-11-12 09:23:39,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 1925 states have (on average 1.2576623376623377) internal successors, (2421), 2036 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 2421 transitions. [2020-11-12 09:23:39,179 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 2421 transitions. Word has length 63 [2020-11-12 09:23:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:39,179 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 2421 transitions. [2020-11-12 09:23:39,179 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 09:23:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 2421 transitions. [2020-11-12 09:23:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:39,180 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:39,180 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 09:23:39,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:39,381 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1322754536, now seen corresponding path program 55 times [2020-11-12 09:23:39,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:39,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876523975] [2020-11-12 09:23:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:39,729 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 09:23:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876523975] [2020-11-12 09:23:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930243637] [2020-11-12 09:23:39,731 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:40,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:40,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:40,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:40,535 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 09:23:40,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:40,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:40,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804083169] [2020-11-12 09:23:40,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:40,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:40,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:40,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:40,537 INFO L87 Difference]: Start difference. First operand 2037 states and 2421 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 09:23:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:43,604 INFO L93 Difference]: Finished difference Result 3472 states and 4060 transitions. [2020-11-12 09:23:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 09:23:43,607 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 09:23:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:43,611 INFO L225 Difference]: With dead ends: 3472 [2020-11-12 09:23:43,611 INFO L226 Difference]: Without dead ends: 3314 [2020-11-12 09:23:43,611 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=744, Invalid=2448, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 09:23:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2020-11-12 09:23:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2037. [2020-11-12 09:23:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 1925 states have (on average 1.2576623376623377) internal successors, (2421), 2036 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 2421 transitions. [2020-11-12 09:23:43,640 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 2421 transitions. Word has length 63 [2020-11-12 09:23:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:43,640 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 2421 transitions. [2020-11-12 09:23:43,640 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 09:23:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 2421 transitions. [2020-11-12 09:23:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:43,641 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:43,641 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 09:23:43,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-12 09:23:43,842 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1513646206, now seen corresponding path program 13 times [2020-11-12 09:23:43,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:43,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321841563] [2020-11-12 09:23:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:44,287 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 09:23:44,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321841563] [2020-11-12 09:23:44,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071031804] [2020-11-12 09:23:44,288 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:44,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:44,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:44,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:44,972 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 09:23:44,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:44,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:44,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866843316] [2020-11-12 09:23:44,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:44,974 INFO L87 Difference]: Start difference. First operand 2037 states and 2421 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 09:23:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:48,709 INFO L93 Difference]: Finished difference Result 4115 states and 4803 transitions. [2020-11-12 09:23:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-12 09:23:48,711 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 09:23:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:48,714 INFO L225 Difference]: With dead ends: 4115 [2020-11-12 09:23:48,714 INFO L226 Difference]: Without dead ends: 3509 [2020-11-12 09:23:48,715 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1007, Invalid=3549, Unknown=0, NotChecked=0, Total=4556 [2020-11-12 09:23:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2020-11-12 09:23:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 1998. [2020-11-12 09:23:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1886 states have (on average 1.2518557794273595) internal successors, (2361), 1997 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 2361 transitions. [2020-11-12 09:23:48,738 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 2361 transitions. Word has length 63 [2020-11-12 09:23:48,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:48,738 INFO L481 AbstractCegarLoop]: Abstraction has 1998 states and 2361 transitions. [2020-11-12 09:23:48,738 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 09:23:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 2361 transitions. [2020-11-12 09:23:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:48,739 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:48,739 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 09:23:48,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:48,940 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash 862344050, now seen corresponding path program 56 times [2020-11-12 09:23:48,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:48,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555915150] [2020-11-12 09:23:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:49,268 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 09:23:49,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555915150] [2020-11-12 09:23:49,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797906544] [2020-11-12 09:23:49,268 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:49,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:23:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:49,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:49,873 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 09:23:49,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:49,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:49,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486685460] [2020-11-12 09:23:49,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:49,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:49,875 INFO L87 Difference]: Start difference. First operand 1998 states and 2361 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 09:23:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:52,663 INFO L93 Difference]: Finished difference Result 4545 states and 5235 transitions. [2020-11-12 09:23:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:23:52,665 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 09:23:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:52,670 INFO L225 Difference]: With dead ends: 4545 [2020-11-12 09:23:52,670 INFO L226 Difference]: Without dead ends: 4147 [2020-11-12 09:23:52,670 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=615, Invalid=2037, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:23:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2020-11-12 09:23:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 2135. [2020-11-12 09:23:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2023 states have (on average 1.2441917943648046) internal successors, (2517), 2134 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 2517 transitions. [2020-11-12 09:23:52,705 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 2517 transitions. Word has length 63 [2020-11-12 09:23:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:52,705 INFO L481 AbstractCegarLoop]: Abstraction has 2135 states and 2517 transitions. [2020-11-12 09:23:52,705 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 09:23:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 2517 transitions. [2020-11-12 09:23:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:52,708 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:52,708 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 09:23:52,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:52,918 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:52,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:52,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1521132912, now seen corresponding path program 57 times [2020-11-12 09:23:52,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:52,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151787363] [2020-11-12 09:23:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:53,266 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 09:23:53,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151787363] [2020-11-12 09:23:53,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338021791] [2020-11-12 09:23:53,267 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:53,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:23:53,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:53,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:53,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:53,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:53,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:54,062 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 09:23:54,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:54,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:54,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909724416] [2020-11-12 09:23:54,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:54,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:54,063 INFO L87 Difference]: Start difference. First operand 2135 states and 2517 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 09:23:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:23:56,826 INFO L93 Difference]: Finished difference Result 4521 states and 5203 transitions. [2020-11-12 09:23:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:23:56,829 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 09:23:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:23:56,833 INFO L225 Difference]: With dead ends: 4521 [2020-11-12 09:23:56,833 INFO L226 Difference]: Without dead ends: 4363 [2020-11-12 09:23:56,834 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=667, Invalid=1985, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:23:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2020-11-12 09:23:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 2154. [2020-11-12 09:23:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2042 states have (on average 1.2507345739471107) internal successors, (2554), 2153 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:23:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 2554 transitions. [2020-11-12 09:23:56,865 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 2554 transitions. Word has length 63 [2020-11-12 09:23:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:23:56,865 INFO L481 AbstractCegarLoop]: Abstraction has 2154 states and 2554 transitions. [2020-11-12 09:23:56,865 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 09:23:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 2554 transitions. [2020-11-12 09:23:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:23:56,867 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:23:56,867 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 09:23:57,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:57,068 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:23:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:23:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1232378876, now seen corresponding path program 58 times [2020-11-12 09:23:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:23:57,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110558838] [2020-11-12 09:23:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:23:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:23:57,440 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 09:23:57,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110558838] [2020-11-12 09:23:57,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154121111] [2020-11-12 09:23:57,441 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:23:57,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:23:57,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:23:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:23:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:23:58,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:23:58,199 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 09:23:58,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:23:58,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:23:58,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512218272] [2020-11-12 09:23:58,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:23:58,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:23:58,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:23:58,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:23:58,200 INFO L87 Difference]: Start difference. First operand 2154 states and 2554 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 09:24:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:01,103 INFO L93 Difference]: Finished difference Result 4316 states and 5011 transitions. [2020-11-12 09:24:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-12 09:24:01,104 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 09:24:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:01,109 INFO L225 Difference]: With dead ends: 4316 [2020-11-12 09:24:01,109 INFO L226 Difference]: Without dead ends: 4158 [2020-11-12 09:24:01,109 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=641, Invalid=1909, Unknown=0, NotChecked=0, Total=2550 [2020-11-12 09:24:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2020-11-12 09:24:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 2155. [2020-11-12 09:24:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2043 states have (on average 1.251101321585903) internal successors, (2556), 2154 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2556 transitions. [2020-11-12 09:24:01,138 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2556 transitions. Word has length 63 [2020-11-12 09:24:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:01,138 INFO L481 AbstractCegarLoop]: Abstraction has 2155 states and 2556 transitions. [2020-11-12 09:24:01,139 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 09:24:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2556 transitions. [2020-11-12 09:24:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:01,140 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:01,140 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 09:24:01,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:01,341 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash 132112946, now seen corresponding path program 59 times [2020-11-12 09:24:01,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:01,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136846651] [2020-11-12 09:24:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:01,688 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 09:24:01,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136846651] [2020-11-12 09:24:01,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966065348] [2020-11-12 09:24:01,688 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:01,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:24:01,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:01,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:02,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:02,288 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 09:24:02,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:02,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:02,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998501684] [2020-11-12 09:24:02,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:02,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:02,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:02,290 INFO L87 Difference]: Start difference. First operand 2155 states and 2556 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 09:24:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:04,957 INFO L93 Difference]: Finished difference Result 4669 states and 5374 transitions. [2020-11-12 09:24:04,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-12 09:24:04,959 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 09:24:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:04,964 INFO L225 Difference]: With dead ends: 4669 [2020-11-12 09:24:04,964 INFO L226 Difference]: Without dead ends: 4511 [2020-11-12 09:24:04,964 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=754, Invalid=2326, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 09:24:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2020-11-12 09:24:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 2167. [2020-11-12 09:24:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2055 states have (on average 1.254014598540146) internal successors, (2577), 2166 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 2577 transitions. [2020-11-12 09:24:04,996 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 2577 transitions. Word has length 63 [2020-11-12 09:24:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:04,996 INFO L481 AbstractCegarLoop]: Abstraction has 2167 states and 2577 transitions. [2020-11-12 09:24:04,996 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 09:24:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 2577 transitions. [2020-11-12 09:24:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:04,998 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:04,998 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 09:24:05,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:05,199 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2122436904, now seen corresponding path program 60 times [2020-11-12 09:24:05,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:05,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275939954] [2020-11-12 09:24:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:05,585 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 09:24:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275939954] [2020-11-12 09:24:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466866274] [2020-11-12 09:24:05,585 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:05,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:24:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:06,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:06,155 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 09:24:06,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:06,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:06,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166404135] [2020-11-12 09:24:06,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:06,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:06,157 INFO L87 Difference]: Start difference. First operand 2167 states and 2577 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 09:24:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:08,193 INFO L93 Difference]: Finished difference Result 4125 states and 4825 transitions. [2020-11-12 09:24:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:24:08,195 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 09:24:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:08,199 INFO L225 Difference]: With dead ends: 4125 [2020-11-12 09:24:08,199 INFO L226 Difference]: Without dead ends: 3967 [2020-11-12 09:24:08,200 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=589, Invalid=1763, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:24:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2020-11-12 09:24:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 2171. [2020-11-12 09:24:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2059 states have (on average 1.2559494900437105) internal successors, (2586), 2170 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 2586 transitions. [2020-11-12 09:24:08,227 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 2586 transitions. Word has length 63 [2020-11-12 09:24:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:08,227 INFO L481 AbstractCegarLoop]: Abstraction has 2171 states and 2586 transitions. [2020-11-12 09:24:08,228 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 09:24:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 2586 transitions. [2020-11-12 09:24:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:08,229 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:08,230 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 09:24:08,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:08,430 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1545850256, now seen corresponding path program 61 times [2020-11-12 09:24:08,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:08,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855027671] [2020-11-12 09:24:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:08,897 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 09:24:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855027671] [2020-11-12 09:24:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698592449] [2020-11-12 09:24:08,898 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:09,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:09,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:09,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:09,649 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 09:24:09,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:09,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:09,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615819583] [2020-11-12 09:24:09,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:09,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:09,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:09,651 INFO L87 Difference]: Start difference. First operand 2171 states and 2586 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 09:24:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:12,135 INFO L93 Difference]: Finished difference Result 4204 states and 4910 transitions. [2020-11-12 09:24:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:24:12,138 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 09:24:12,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:12,142 INFO L225 Difference]: With dead ends: 4204 [2020-11-12 09:24:12,142 INFO L226 Difference]: Without dead ends: 4046 [2020-11-12 09:24:12,142 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=610, Invalid=1840, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 09:24:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2020-11-12 09:24:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 2170. [2020-11-12 09:24:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2058 states have (on average 1.2555879494655005) internal successors, (2584), 2169 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2584 transitions. [2020-11-12 09:24:12,171 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2584 transitions. Word has length 63 [2020-11-12 09:24:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:12,172 INFO L481 AbstractCegarLoop]: Abstraction has 2170 states and 2584 transitions. [2020-11-12 09:24:12,172 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 09:24:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2584 transitions. [2020-11-12 09:24:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:12,174 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:12,174 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 09:24:12,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:12,375 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1718596446, now seen corresponding path program 62 times [2020-11-12 09:24:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:12,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836955507] [2020-11-12 09:24:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:12,846 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 09:24:12,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836955507] [2020-11-12 09:24:12,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198273292] [2020-11-12 09:24:12,847 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:12,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:24:12,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:12,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:13,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:13,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:13,446 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 09:24:13,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:13,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:13,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118539649] [2020-11-12 09:24:13,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:13,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:13,448 INFO L87 Difference]: Start difference. First operand 2170 states and 2584 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 09:24:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:20,084 INFO L93 Difference]: Finished difference Result 5375 states and 6283 transitions. [2020-11-12 09:24:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-12 09:24:20,087 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 09:24:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:20,093 INFO L225 Difference]: With dead ends: 5375 [2020-11-12 09:24:20,093 INFO L226 Difference]: Without dead ends: 4617 [2020-11-12 09:24:20,094 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1545, Invalid=5427, Unknown=0, NotChecked=0, Total=6972 [2020-11-12 09:24:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2020-11-12 09:24:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2237. [2020-11-12 09:24:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2125 states have (on average 1.251294117647059) internal successors, (2659), 2236 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 09:24:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 2659 transitions. [2020-11-12 09:24:20,131 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 2659 transitions. Word has length 63 [2020-11-12 09:24:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:20,131 INFO L481 AbstractCegarLoop]: Abstraction has 2237 states and 2659 transitions. [2020-11-12 09:24:20,131 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 09:24:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 2659 transitions. [2020-11-12 09:24:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:20,133 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:20,133 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 09:24:20,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-11-12 09:24:20,334 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1323290786, now seen corresponding path program 63 times [2020-11-12 09:24:20,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:20,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544671657] [2020-11-12 09:24:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:20,838 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 09:24:20,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544671657] [2020-11-12 09:24:20,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987307745] [2020-11-12 09:24:20,839 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:20,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:24:20,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:20,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:21,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:21,627 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 09:24:21,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:21,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948388070] [2020-11-12 09:24:21,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:21,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:21,629 INFO L87 Difference]: Start difference. First operand 2237 states and 2659 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 09:24:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:26,500 INFO L93 Difference]: Finished difference Result 4695 states and 5459 transitions. [2020-11-12 09:24:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-12 09:24:26,504 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 09:24:26,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:26,509 INFO L225 Difference]: With dead ends: 4695 [2020-11-12 09:24:26,509 INFO L226 Difference]: Without dead ends: 4537 [2020-11-12 09:24:26,510 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=866, Invalid=2916, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 09:24:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2020-11-12 09:24:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 2233. [2020-11-12 09:24:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2121 states have (on average 1.2494106553512494) internal successors, (2650), 2232 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 2650 transitions. [2020-11-12 09:24:26,545 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 2650 transitions. Word has length 63 [2020-11-12 09:24:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:26,546 INFO L481 AbstractCegarLoop]: Abstraction has 2233 states and 2650 transitions. [2020-11-12 09:24:26,546 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 09:24:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 2650 transitions. [2020-11-12 09:24:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:26,548 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:26,548 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 09:24:26,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:26,750 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash -715363796, now seen corresponding path program 64 times [2020-11-12 09:24:26,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:26,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348122730] [2020-11-12 09:24:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:27,403 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 09:24:27,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348122730] [2020-11-12 09:24:27,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455262116] [2020-11-12 09:24:27,404 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:27,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:24:27,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:27,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:28,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:28,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:28,385 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 09:24:28,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:28,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:28,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315657365] [2020-11-12 09:24:28,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:28,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:28,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:28,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:28,386 INFO L87 Difference]: Start difference. First operand 2233 states and 2650 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 09:24:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:36,022 INFO L93 Difference]: Finished difference Result 5441 states and 6365 transitions. [2020-11-12 09:24:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-12 09:24:36,026 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 09:24:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:36,032 INFO L225 Difference]: With dead ends: 5441 [2020-11-12 09:24:36,032 INFO L226 Difference]: Without dead ends: 4835 [2020-11-12 09:24:36,032 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1464, Invalid=5016, Unknown=0, NotChecked=0, Total=6480 [2020-11-12 09:24:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2020-11-12 09:24:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 2216. [2020-11-12 09:24:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2104 states have (on average 1.248574144486692) internal successors, (2627), 2215 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 2627 transitions. [2020-11-12 09:24:36,070 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 2627 transitions. Word has length 63 [2020-11-12 09:24:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:36,070 INFO L481 AbstractCegarLoop]: Abstraction has 2216 states and 2627 transitions. [2020-11-12 09:24:36,070 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 09:24:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 2627 transitions. [2020-11-12 09:24:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:36,072 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:36,072 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 09:24:36,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-12 09:24:36,273 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2030528958, now seen corresponding path program 65 times [2020-11-12 09:24:36,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:36,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486972370] [2020-11-12 09:24:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:36,730 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 09:24:36,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486972370] [2020-11-12 09:24:36,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264794788] [2020-11-12 09:24:36,731 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:36,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:24:36,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:36,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:36,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:37,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:37,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:37,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:37,673 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 09:24:37,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:37,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:37,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651795593] [2020-11-12 09:24:37,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:37,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:37,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:37,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:37,675 INFO L87 Difference]: Start difference. First operand 2216 states and 2627 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 09:24:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:43,148 INFO L93 Difference]: Finished difference Result 4997 states and 5737 transitions. [2020-11-12 09:24:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-12 09:24:43,152 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 09:24:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:43,158 INFO L225 Difference]: With dead ends: 4997 [2020-11-12 09:24:43,159 INFO L226 Difference]: Without dead ends: 4839 [2020-11-12 09:24:43,159 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=903, Invalid=3129, Unknown=0, NotChecked=0, Total=4032 [2020-11-12 09:24:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2020-11-12 09:24:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 2241. [2020-11-12 09:24:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2129 states have (on average 1.2555190230155002) internal successors, (2673), 2240 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 2673 transitions. [2020-11-12 09:24:43,215 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 2673 transitions. Word has length 63 [2020-11-12 09:24:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:43,215 INFO L481 AbstractCegarLoop]: Abstraction has 2241 states and 2673 transitions. [2020-11-12 09:24:43,215 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 09:24:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 2673 transitions. [2020-11-12 09:24:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:43,217 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:43,217 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 09:24:43,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:43,418 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1975684302, now seen corresponding path program 66 times [2020-11-12 09:24:43,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:43,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781800995] [2020-11-12 09:24:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:43,787 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 09:24:43,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781800995] [2020-11-12 09:24:43,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323692580] [2020-11-12 09:24:43,788 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:43,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:24:43,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:43,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:44,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:44,856 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 09:24:44,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:44,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:44,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775099530] [2020-11-12 09:24:44,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:44,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:44,858 INFO L87 Difference]: Start difference. First operand 2241 states and 2673 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 09:24:46,380 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-11-12 09:24:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:50,107 INFO L93 Difference]: Finished difference Result 4830 states and 5635 transitions. [2020-11-12 09:24:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-12 09:24:50,111 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 09:24:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:50,117 INFO L225 Difference]: With dead ends: 4830 [2020-11-12 09:24:50,118 INFO L226 Difference]: Without dead ends: 4672 [2020-11-12 09:24:50,118 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=796, Invalid=2744, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 09:24:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2020-11-12 09:24:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 2237. [2020-11-12 09:24:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2125 states have (on average 1.2536470588235293) internal successors, (2664), 2236 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 09:24:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 2664 transitions. [2020-11-12 09:24:50,158 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 2664 transitions. Word has length 63 [2020-11-12 09:24:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:50,158 INFO L481 AbstractCegarLoop]: Abstraction has 2237 states and 2664 transitions. [2020-11-12 09:24:50,158 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 09:24:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 2664 transitions. [2020-11-12 09:24:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:50,160 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:50,160 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 09:24:50,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:50,361 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1162548568, now seen corresponding path program 67 times [2020-11-12 09:24:50,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:50,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823268236] [2020-11-12 09:24:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:50,943 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 09:24:50,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823268236] [2020-11-12 09:24:50,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118732955] [2020-11-12 09:24:50,944 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:51,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:51,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:51,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:51,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:51,963 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 09:24:51,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:51,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:51,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515247442] [2020-11-12 09:24:51,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:51,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:51,965 INFO L87 Difference]: Start difference. First operand 2237 states and 2664 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 09:24:54,097 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-11-12 09:24:59,349 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-12 09:25:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:02,391 INFO L93 Difference]: Finished difference Result 5604 states and 6552 transitions. [2020-11-12 09:25:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-12 09:25:02,395 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 09:25:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:02,401 INFO L225 Difference]: With dead ends: 5604 [2020-11-12 09:25:02,401 INFO L226 Difference]: Without dead ends: 4998 [2020-11-12 09:25:02,402 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2961 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1831, Invalid=6359, Unknown=0, NotChecked=0, Total=8190 [2020-11-12 09:25:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2020-11-12 09:25:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 2255. [2020-11-12 09:25:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2143 states have (on average 1.2557162855809614) internal successors, (2691), 2254 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 2691 transitions. [2020-11-12 09:25:02,440 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 2691 transitions. Word has length 63 [2020-11-12 09:25:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:02,440 INFO L481 AbstractCegarLoop]: Abstraction has 2255 states and 2691 transitions. [2020-11-12 09:25:02,440 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 09:25:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 2691 transitions. [2020-11-12 09:25:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:02,442 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:02,442 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 09:25:02,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:02,643 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash -90531496, now seen corresponding path program 68 times [2020-11-12 09:25:02,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:02,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645173814] [2020-11-12 09:25:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:03,129 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 09:25:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645173814] [2020-11-12 09:25:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411487072] [2020-11-12 09:25:03,130 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:03,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:25:03,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:03,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:04,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:04,247 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 09:25:04,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:04,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:04,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232142002] [2020-11-12 09:25:04,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:04,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:04,249 INFO L87 Difference]: Start difference. First operand 2255 states and 2691 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 09:25:05,582 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-11-12 09:25:05,928 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2020-11-12 09:25:08,240 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-11-12 09:25:08,576 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-11-12 09:25:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:10,588 INFO L93 Difference]: Finished difference Result 4662 states and 5412 transitions. [2020-11-12 09:25:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-12 09:25:10,590 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 09:25:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:10,594 INFO L225 Difference]: With dead ends: 4662 [2020-11-12 09:25:10,594 INFO L226 Difference]: Without dead ends: 4504 [2020-11-12 09:25:10,594 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1014, Invalid=3408, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 09:25:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2020-11-12 09:25:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 2272. [2020-11-12 09:25:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2160 states have (on average 1.2592592592592593) internal successors, (2720), 2271 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2720 transitions. [2020-11-12 09:25:10,634 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2720 transitions. Word has length 63 [2020-11-12 09:25:10,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:10,634 INFO L481 AbstractCegarLoop]: Abstraction has 2272 states and 2720 transitions. [2020-11-12 09:25:10,634 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 09:25:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2720 transitions. [2020-11-12 09:25:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:10,635 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:10,636 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 09:25:10,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:10,836 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2129186078, now seen corresponding path program 69 times [2020-11-12 09:25:10,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:10,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27718509] [2020-11-12 09:25:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:11,463 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 09:25:11,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27718509] [2020-11-12 09:25:11,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714137877] [2020-11-12 09:25:11,464 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:11,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:25:11,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:11,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:12,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:12,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:12,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:12,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:12,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:12,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:12,673 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 09:25:12,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:12,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:12,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617713675] [2020-11-12 09:25:12,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:12,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:12,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:12,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:12,675 INFO L87 Difference]: Start difference. First operand 2272 states and 2720 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 09:25:13,914 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-11-12 09:25:14,289 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-11-12 09:25:15,248 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-11-12 09:25:15,650 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-11-12 09:25:16,078 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-11-12 09:25:16,614 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2020-11-12 09:25:16,819 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-11-12 09:25:17,389 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-11-12 09:25:17,799 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-11-12 09:25:18,059 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2020-11-12 09:25:18,361 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-11-12 09:25:19,216 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-11-12 09:25:21,062 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 21 [2020-11-12 09:25:21,539 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 18 [2020-11-12 09:25:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:24,004 INFO L93 Difference]: Finished difference Result 5365 states and 6256 transitions. [2020-11-12 09:25:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-12 09:25:24,006 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 09:25:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:24,011 INFO L225 Difference]: With dead ends: 5365 [2020-11-12 09:25:24,011 INFO L226 Difference]: Without dead ends: 4759 [2020-11-12 09:25:24,011 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1697, Invalid=5785, Unknown=0, NotChecked=0, Total=7482 [2020-11-12 09:25:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2020-11-12 09:25:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2247. [2020-11-12 09:25:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2135 states have (on average 1.2552693208430914) internal successors, (2680), 2246 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 2680 transitions. [2020-11-12 09:25:24,039 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 2680 transitions. Word has length 63 [2020-11-12 09:25:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:24,039 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 2680 transitions. [2020-11-12 09:25:24,039 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 09:25:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 2680 transitions. [2020-11-12 09:25:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:24,041 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:24,041 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 09:25:24,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:24,242 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash -644197214, now seen corresponding path program 70 times [2020-11-12 09:25:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:24,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557426468] [2020-11-12 09:25:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:24,746 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 09:25:24,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557426468] [2020-11-12 09:25:24,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581304342] [2020-11-12 09:25:24,746 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:24,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:25:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:24,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:25,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:25,718 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 09:25:25,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:25,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779173804] [2020-11-12 09:25:25,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:25,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:25,720 INFO L87 Difference]: Start difference. First operand 2247 states and 2680 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 09:25:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:30,361 INFO L93 Difference]: Finished difference Result 4947 states and 5700 transitions. [2020-11-12 09:25:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-12 09:25:30,367 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 09:25:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:30,372 INFO L225 Difference]: With dead ends: 4947 [2020-11-12 09:25:30,373 INFO L226 Difference]: Without dead ends: 4789 [2020-11-12 09:25:30,373 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 09:25:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2020-11-12 09:25:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 2260. [2020-11-12 09:25:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2148 states have (on average 1.2583798882681565) internal successors, (2703), 2259 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2703 transitions. [2020-11-12 09:25:30,430 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2703 transitions. Word has length 63 [2020-11-12 09:25:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:30,430 INFO L481 AbstractCegarLoop]: Abstraction has 2260 states and 2703 transitions. [2020-11-12 09:25:30,430 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 09:25:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2703 transitions. [2020-11-12 09:25:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:30,432 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:30,432 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 09:25:30,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:30,633 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1346126744, now seen corresponding path program 71 times [2020-11-12 09:25:30,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:30,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051111574] [2020-11-12 09:25:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:31,285 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 09:25:31,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051111574] [2020-11-12 09:25:31,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837137987] [2020-11-12 09:25:31,286 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:31,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:25:31,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:31,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:32,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:32,146 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 09:25:32,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:32,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:32,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382675935] [2020-11-12 09:25:32,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:32,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:32,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:32,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:32,147 INFO L87 Difference]: Start difference. First operand 2260 states and 2703 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 09:25:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:36,075 INFO L93 Difference]: Finished difference Result 4490 states and 5272 transitions. [2020-11-12 09:25:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-12 09:25:36,079 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 09:25:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:36,085 INFO L225 Difference]: With dead ends: 4490 [2020-11-12 09:25:36,085 INFO L226 Difference]: Without dead ends: 4332 [2020-11-12 09:25:36,085 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=658, Invalid=2312, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 09:25:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2020-11-12 09:25:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 2245. [2020-11-12 09:25:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2133 states have (on average 1.2541022034692921) internal successors, (2675), 2244 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 09:25:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2675 transitions. [2020-11-12 09:25:36,122 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2675 transitions. Word has length 63 [2020-11-12 09:25:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:36,123 INFO L481 AbstractCegarLoop]: Abstraction has 2245 states and 2675 transitions. [2020-11-12 09:25:36,123 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 09:25:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2675 transitions. [2020-11-12 09:25:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:36,125 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:36,125 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 09:25:36,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-11-12 09:25:36,339 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:36,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1310423636, now seen corresponding path program 72 times [2020-11-12 09:25:36,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:36,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646391845] [2020-11-12 09:25:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:36,984 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 09:25:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646391845] [2020-11-12 09:25:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887027622] [2020-11-12 09:25:36,985 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:37,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:25:37,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:37,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:37,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:37,957 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 09:25:37,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:37,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:37,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772670140] [2020-11-12 09:25:37,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:37,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:37,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:37,960 INFO L87 Difference]: Start difference. First operand 2245 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 09:25:43,887 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-11-12 09:25:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:47,268 INFO L93 Difference]: Finished difference Result 5139 states and 6027 transitions. [2020-11-12 09:25:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-12 09:25:47,271 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 09:25:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:47,276 INFO L225 Difference]: With dead ends: 5139 [2020-11-12 09:25:47,276 INFO L226 Difference]: Without dead ends: 4533 [2020-11-12 09:25:47,277 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3185 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1862, Invalid=6694, Unknown=0, NotChecked=0, Total=8556 [2020-11-12 09:25:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4533 states. [2020-11-12 09:25:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4533 to 2260. [2020-11-12 09:25:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2148 states have (on average 1.2541899441340782) internal successors, (2694), 2259 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2694 transitions. [2020-11-12 09:25:47,302 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2694 transitions. Word has length 63 [2020-11-12 09:25:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:47,303 INFO L481 AbstractCegarLoop]: Abstraction has 2260 states and 2694 transitions. [2020-11-12 09:25:47,303 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 09:25:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2694 transitions. [2020-11-12 09:25:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:47,304 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:47,304 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 09:25:47,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:47,505 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1731463596, now seen corresponding path program 73 times [2020-11-12 09:25:47,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:47,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765413122] [2020-11-12 09:25:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:48,053 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 09:25:48,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765413122] [2020-11-12 09:25:48,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141064940] [2020-11-12 09:25:48,053 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:48,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:49,016 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 09:25:49,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:49,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:49,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100517677] [2020-11-12 09:25:49,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:49,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:49,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:49,017 INFO L87 Difference]: Start difference. First operand 2260 states and 2694 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 09:25:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:54,372 INFO L93 Difference]: Finished difference Result 4286 states and 5019 transitions. [2020-11-12 09:25:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-12 09:25:54,377 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 09:25:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:54,382 INFO L225 Difference]: With dead ends: 4286 [2020-11-12 09:25:54,382 INFO L226 Difference]: Without dead ends: 4128 [2020-11-12 09:25:54,383 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=961, Invalid=3329, Unknown=0, NotChecked=0, Total=4290 [2020-11-12 09:25:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2020-11-12 09:25:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 2267. [2020-11-12 09:25:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2155 states have (on average 1.254756380510441) internal successors, (2704), 2266 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2704 transitions. [2020-11-12 09:25:54,420 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2704 transitions. Word has length 63 [2020-11-12 09:25:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:54,420 INFO L481 AbstractCegarLoop]: Abstraction has 2267 states and 2704 transitions. [2020-11-12 09:25:54,420 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 09:25:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2704 transitions. [2020-11-12 09:25:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:54,423 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:54,423 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 09:25:54,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-11-12 09:25:54,625 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:54,626 INFO L82 PathProgramCache]: Analyzing trace with hash -307190986, now seen corresponding path program 74 times [2020-11-12 09:25:54,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:54,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717841007] [2020-11-12 09:25:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:55,269 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 09:25:55,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717841007] [2020-11-12 09:25:55,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250379068] [2020-11-12 09:25:55,270 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:55,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:25:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:56,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:56,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:56,122 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 09:25:56,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:56,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:56,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137103337] [2020-11-12 09:25:56,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:56,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:56,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:56,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:56,124 INFO L87 Difference]: Start difference. First operand 2267 states and 2704 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 09:26:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:03,594 INFO L93 Difference]: Finished difference Result 5025 states and 5879 transitions. [2020-11-12 09:26:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-12 09:26:03,599 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 09:26:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:03,604 INFO L225 Difference]: With dead ends: 5025 [2020-11-12 09:26:03,605 INFO L226 Difference]: Without dead ends: 4419 [2020-11-12 09:26:03,606 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1603, Invalid=5707, Unknown=0, NotChecked=0, Total=7310 [2020-11-12 09:26:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4419 states. [2020-11-12 09:26:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4419 to 2260. [2020-11-12 09:26:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2148 states have (on average 1.254655493482309) internal successors, (2695), 2259 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2695 transitions. [2020-11-12 09:26:03,644 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2695 transitions. Word has length 63 [2020-11-12 09:26:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:03,644 INFO L481 AbstractCegarLoop]: Abstraction has 2260 states and 2695 transitions. [2020-11-12 09:26:03,644 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 09:26:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2695 transitions. [2020-11-12 09:26:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:03,646 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:03,646 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 09:26:03,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:03,847 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1570721378, now seen corresponding path program 75 times [2020-11-12 09:26:03,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:03,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773869309] [2020-11-12 09:26:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:04,513 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 09:26:04,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773869309] [2020-11-12 09:26:04,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361957423] [2020-11-12 09:26:04,514 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:04,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:26:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:05,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:05,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:05,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:05,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:05,586 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 09:26:05,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:05,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:05,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471894956] [2020-11-12 09:26:05,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:05,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:05,588 INFO L87 Difference]: Start difference. First operand 2260 states and 2695 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 09:26:11,557 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-11-12 09:26:12,553 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-11-12 09:26:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:15,090 INFO L93 Difference]: Finished difference Result 5242 states and 6075 transitions. [2020-11-12 09:26:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-12 09:26:15,094 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 09:26:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:15,100 INFO L225 Difference]: With dead ends: 5242 [2020-11-12 09:26:15,100 INFO L226 Difference]: Without dead ends: 4636 [2020-11-12 09:26:15,101 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1653, Invalid=5829, Unknown=0, NotChecked=0, Total=7482 [2020-11-12 09:26:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2020-11-12 09:26:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 2268. [2020-11-12 09:26:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2156 states have (on average 1.2555658627087198) internal successors, (2707), 2267 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2707 transitions. [2020-11-12 09:26:15,137 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2707 transitions. Word has length 63 [2020-11-12 09:26:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:15,137 INFO L481 AbstractCegarLoop]: Abstraction has 2268 states and 2707 transitions. [2020-11-12 09:26:15,137 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 09:26:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2707 transitions. [2020-11-12 09:26:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:15,139 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:15,139 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 09:26:15,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:15,340 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:15,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1163721496, now seen corresponding path program 76 times [2020-11-12 09:26:15,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:15,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811799630] [2020-11-12 09:26:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:15,852 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 09:26:15,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811799630] [2020-11-12 09:26:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170194526] [2020-11-12 09:26:15,853 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:15,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:26:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:16,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:16,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:16,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:16,742 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 09:26:16,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:16,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:16,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269429790] [2020-11-12 09:26:16,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:16,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:16,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:16,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:16,744 INFO L87 Difference]: Start difference. First operand 2268 states and 2707 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 09:26:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:19,473 INFO L93 Difference]: Finished difference Result 4484 states and 5278 transitions. [2020-11-12 09:26:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:26:19,477 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 09:26:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:19,483 INFO L225 Difference]: With dead ends: 4484 [2020-11-12 09:26:19,483 INFO L226 Difference]: Without dead ends: 4326 [2020-11-12 09:26:19,483 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=481, Invalid=1325, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 09:26:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2020-11-12 09:26:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 2283. [2020-11-12 09:26:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2171 states have (on average 1.2574850299401197) internal successors, (2730), 2282 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 2730 transitions. [2020-11-12 09:26:19,551 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 2730 transitions. Word has length 63 [2020-11-12 09:26:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:19,551 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 2730 transitions. [2020-11-12 09:26:19,551 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 09:26:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 2730 transitions. [2020-11-12 09:26:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:19,553 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:19,553 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 09:26:19,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-11-12 09:26:19,754 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:19,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:19,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1098896606, now seen corresponding path program 77 times [2020-11-12 09:26:19,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:19,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748167964] [2020-11-12 09:26:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:20,221 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 09:26:20,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748167964] [2020-11-12 09:26:20,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017769188] [2020-11-12 09:26:20,222 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:20,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:26:20,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:20,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:21,045 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 09:26:21,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:21,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:21,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582437987] [2020-11-12 09:26:21,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:21,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:21,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:21,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:21,047 INFO L87 Difference]: Start difference. First operand 2283 states and 2730 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 09:26:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:23,861 INFO L93 Difference]: Finished difference Result 4499 states and 5245 transitions. [2020-11-12 09:26:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:26:23,865 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 09:26:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:23,870 INFO L225 Difference]: With dead ends: 4499 [2020-11-12 09:26:23,870 INFO L226 Difference]: Without dead ends: 4341 [2020-11-12 09:26:23,870 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:26:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4341 states. [2020-11-12 09:26:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4341 to 2277. [2020-11-12 09:26:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2165 states have (on average 1.2549653579676674) internal successors, (2717), 2276 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 2717 transitions. [2020-11-12 09:26:23,904 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 2717 transitions. Word has length 63 [2020-11-12 09:26:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:23,905 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 2717 transitions. [2020-11-12 09:26:23,905 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 09:26:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 2717 transitions. [2020-11-12 09:26:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:23,908 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:23,908 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 09:26:24,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-12 09:26:24,124 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1387650642, now seen corresponding path program 78 times [2020-11-12 09:26:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:24,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817519317] [2020-11-12 09:26:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:24,632 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 09:26:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817519317] [2020-11-12 09:26:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068328853] [2020-11-12 09:26:24,633 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:24,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:26:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:24,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:25,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:25,517 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 09:26:25,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:25,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:25,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40434411] [2020-11-12 09:26:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:25,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:25,519 INFO L87 Difference]: Start difference. First operand 2277 states and 2717 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 09:26:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:27,999 INFO L93 Difference]: Finished difference Result 4624 states and 5410 transitions. [2020-11-12 09:26:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:26:28,003 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 09:26:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:28,008 INFO L225 Difference]: With dead ends: 4624 [2020-11-12 09:26:28,008 INFO L226 Difference]: Without dead ends: 4466 [2020-11-12 09:26:28,008 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=479, Invalid=1327, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 09:26:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2020-11-12 09:26:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 2285. [2020-11-12 09:26:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2173 states have (on average 1.2586286240220892) internal successors, (2735), 2284 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 09:26:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 2735 transitions. [2020-11-12 09:26:28,043 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 2735 transitions. Word has length 63 [2020-11-12 09:26:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:28,043 INFO L481 AbstractCegarLoop]: Abstraction has 2285 states and 2735 transitions. [2020-11-12 09:26:28,043 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 09:26:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 2735 transitions. [2020-11-12 09:26:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:28,045 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:28,045 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 09:26:28,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:28,246 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1082618200, now seen corresponding path program 79 times [2020-11-12 09:26:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:28,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002023838] [2020-11-12 09:26:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:28,771 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 09:26:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002023838] [2020-11-12 09:26:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495267681] [2020-11-12 09:26:28,772 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:28,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:28,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:29,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:29,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:29,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:29,740 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 09:26:29,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:29,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:29,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918159726] [2020-11-12 09:26:29,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:29,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:29,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:29,741 INFO L87 Difference]: Start difference. First operand 2285 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 09:26:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:32,794 INFO L93 Difference]: Finished difference Result 4662 states and 5512 transitions. [2020-11-12 09:26:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 09:26:32,799 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 09:26:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:32,804 INFO L225 Difference]: With dead ends: 4662 [2020-11-12 09:26:32,804 INFO L226 Difference]: Without dead ends: 4504 [2020-11-12 09:26:32,805 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=510, Invalid=1652, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:26:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2020-11-12 09:26:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 2295. [2020-11-12 09:26:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2183 states have (on average 1.2629409070087037) internal successors, (2757), 2294 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 2757 transitions. [2020-11-12 09:26:32,843 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 2757 transitions. Word has length 63 [2020-11-12 09:26:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:32,843 INFO L481 AbstractCegarLoop]: Abstraction has 2295 states and 2757 transitions. [2020-11-12 09:26:32,843 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 09:26:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 2757 transitions. [2020-11-12 09:26:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:32,846 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:32,846 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 09:26:33,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-12 09:26:33,059 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash 949730994, now seen corresponding path program 80 times [2020-11-12 09:26:33,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:33,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200615764] [2020-11-12 09:26:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:33,556 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 09:26:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200615764] [2020-11-12 09:26:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397592657] [2020-11-12 09:26:33,557 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:33,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:26:33,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:34,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:34,524 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 09:26:34,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:34,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:34,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041806944] [2020-11-12 09:26:34,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:34,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:34,526 INFO L87 Difference]: Start difference. First operand 2295 states and 2757 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 09:26:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:37,424 INFO L93 Difference]: Finished difference Result 4655 states and 5428 transitions. [2020-11-12 09:26:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:26:37,431 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 09:26:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:37,436 INFO L225 Difference]: With dead ends: 4655 [2020-11-12 09:26:37,436 INFO L226 Difference]: Without dead ends: 4497 [2020-11-12 09:26:37,437 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=541, Invalid=1811, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:26:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2020-11-12 09:26:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 2295. [2020-11-12 09:26:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2183 states have (on average 1.2629409070087037) internal successors, (2757), 2294 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 2757 transitions. [2020-11-12 09:26:37,472 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 2757 transitions. Word has length 63 [2020-11-12 09:26:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:37,472 INFO L481 AbstractCegarLoop]: Abstraction has 2295 states and 2757 transitions. [2020-11-12 09:26:37,472 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 09:26:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 2757 transitions. [2020-11-12 09:26:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:37,474 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:37,474 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 09:26:37,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:37,675 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:37,675 INFO L82 PathProgramCache]: Analyzing trace with hash 660976958, now seen corresponding path program 81 times [2020-11-12 09:26:37,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:37,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646769442] [2020-11-12 09:26:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:38,309 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 09:26:38,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646769442] [2020-11-12 09:26:38,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835349636] [2020-11-12 09:26:38,310 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:38,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:26:38,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:38,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:39,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:39,307 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 09:26:39,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:39,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:39,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000232505] [2020-11-12 09:26:39,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:39,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:39,309 INFO L87 Difference]: Start difference. First operand 2295 states and 2757 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 09:26:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:42,182 INFO L93 Difference]: Finished difference Result 4575 states and 5375 transitions. [2020-11-12 09:26:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:26:42,187 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 09:26:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:42,192 INFO L225 Difference]: With dead ends: 4575 [2020-11-12 09:26:42,192 INFO L226 Difference]: Without dead ends: 4417 [2020-11-12 09:26:42,192 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=479, Invalid=1591, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:26:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2020-11-12 09:26:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 2290. [2020-11-12 09:26:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2178 states have (on average 1.2630853994490359) internal successors, (2751), 2289 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 2751 transitions. [2020-11-12 09:26:42,227 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 2751 transitions. Word has length 63 [2020-11-12 09:26:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:42,227 INFO L481 AbstractCegarLoop]: Abstraction has 2290 states and 2751 transitions. [2020-11-12 09:26:42,227 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 09:26:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 2751 transitions. [2020-11-12 09:26:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:42,229 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:42,229 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 09:26:42,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-11-12 09:26:42,430 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:42,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:42,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2117252174, now seen corresponding path program 82 times [2020-11-12 09:26:42,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:42,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937307260] [2020-11-12 09:26:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:42,883 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 09:26:42,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937307260] [2020-11-12 09:26:42,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979065712] [2020-11-12 09:26:42,883 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:42,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:26:42,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:43,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:43,962 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 09:26:43,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:43,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:43,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291610260] [2020-11-12 09:26:43,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:43,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:43,963 INFO L87 Difference]: Start difference. First operand 2290 states and 2751 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 09:26:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:50,839 INFO L93 Difference]: Finished difference Result 4611 states and 5416 transitions. [2020-11-12 09:26:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:26:50,843 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 09:26:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:50,848 INFO L225 Difference]: With dead ends: 4611 [2020-11-12 09:26:50,848 INFO L226 Difference]: Without dead ends: 4453 [2020-11-12 09:26:50,849 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=385, Invalid=1337, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:26:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2020-11-12 09:26:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 2275. [2020-11-12 09:26:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2163 states have (on average 1.2565880721220528) internal successors, (2718), 2274 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2718 transitions. [2020-11-12 09:26:50,883 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 2718 transitions. Word has length 63 [2020-11-12 09:26:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:50,883 INFO L481 AbstractCegarLoop]: Abstraction has 2275 states and 2718 transitions. [2020-11-12 09:26:50,883 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 09:26:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 2718 transitions. [2020-11-12 09:26:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:50,885 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:50,885 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 09:26:51,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:51,087 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:51,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1538851186, now seen corresponding path program 83 times [2020-11-12 09:26:51,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:51,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802221571] [2020-11-12 09:26:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:51,583 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 09:26:51,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802221571] [2020-11-12 09:26:51,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276277248] [2020-11-12 09:26:51,584 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:51,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:26:51,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:51,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:52,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:52,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:52,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:52,658 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 09:26:52,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:52,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:52,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821148637] [2020-11-12 09:26:52,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:52,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:52,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:52,659 INFO L87 Difference]: Start difference. First operand 2275 states and 2718 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 09:26:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:57,308 INFO L93 Difference]: Finished difference Result 5090 states and 5993 transitions. [2020-11-12 09:26:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 09:26:57,311 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 09:26:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:57,317 INFO L225 Difference]: With dead ends: 5090 [2020-11-12 09:26:57,317 INFO L226 Difference]: Without dead ends: 4932 [2020-11-12 09:26:57,317 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=849, Invalid=2811, Unknown=0, NotChecked=0, Total=3660 [2020-11-12 09:26:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2020-11-12 09:26:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 2281. [2020-11-12 09:26:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2169 states have (on average 1.2568003688335638) internal successors, (2726), 2280 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 2726 transitions. [2020-11-12 09:26:57,350 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 2726 transitions. Word has length 63 [2020-11-12 09:26:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:57,350 INFO L481 AbstractCegarLoop]: Abstraction has 2281 states and 2726 transitions. [2020-11-12 09:26:57,350 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 09:26:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 2726 transitions. [2020-11-12 09:26:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:57,351 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:57,351 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 09:26:57,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-11-12 09:26:57,552 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1648769368, now seen corresponding path program 84 times [2020-11-12 09:26:57,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:57,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583675325] [2020-11-12 09:26:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:57,992 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 09:26:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583675325] [2020-11-12 09:26:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324189752] [2020-11-12 09:26:57,992 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:58,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:26:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:58,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:58,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:58,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:58,989 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 09:26:58,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:58,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:58,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975642867] [2020-11-12 09:26:58,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:58,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:58,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:58,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:26:58,990 INFO L87 Difference]: Start difference. First operand 2281 states and 2726 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 09:27:00,852 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-11-12 09:27:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:04,207 INFO L93 Difference]: Finished difference Result 4674 states and 5524 transitions. [2020-11-12 09:27:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-12 09:27:04,211 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 09:27:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:04,216 INFO L225 Difference]: With dead ends: 4674 [2020-11-12 09:27:04,216 INFO L226 Difference]: Without dead ends: 4516 [2020-11-12 09:27:04,217 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=934, Invalid=2972, Unknown=0, NotChecked=0, Total=3906 [2020-11-12 09:27:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2020-11-12 09:27:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 2288. [2020-11-12 09:27:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2176 states have (on average 1.2605698529411764) internal successors, (2743), 2287 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 2743 transitions. [2020-11-12 09:27:04,253 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 2743 transitions. Word has length 63 [2020-11-12 09:27:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:04,253 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 2743 transitions. [2020-11-12 09:27:04,253 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 09:27:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 2743 transitions. [2020-11-12 09:27:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:27:04,255 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:04,255 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 09:27:04,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-11-12 09:27:04,456 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1457877698, now seen corresponding path program 85 times [2020-11-12 09:27:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:04,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566565156] [2020-11-12 09:27:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:04,970 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 09:27:04,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566565156] [2020-11-12 09:27:04,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577646964] [2020-11-12 09:27:04,970 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:27:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:05,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:05,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:05,635 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 09:27:05,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:05,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:27:05,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761865337] [2020-11-12 09:27:05,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:27:05,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:05,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:27:05,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:27:05,637 INFO L87 Difference]: Start difference. First operand 2288 states and 2743 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:11,086 INFO L93 Difference]: Finished difference Result 4638 states and 5432 transitions. [2020-11-12 09:27:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 09:27:11,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 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 09:27:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:11,096 INFO L225 Difference]: With dead ends: 4638 [2020-11-12 09:27:11,096 INFO L226 Difference]: Without dead ends: 4304 [2020-11-12 09:27:11,097 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1080, Invalid=3210, Unknown=0, NotChecked=0, Total=4290 [2020-11-12 09:27:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-11-12 09:27:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 2298. [2020-11-12 09:27:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2186 states have (on average 1.2607502287282708) internal successors, (2756), 2297 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 2756 transitions. [2020-11-12 09:27:11,130 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 2756 transitions. Word has length 63 [2020-11-12 09:27:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:11,130 INFO L481 AbstractCegarLoop]: Abstraction has 2298 states and 2756 transitions. [2020-11-12 09:27:11,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 2756 transitions. [2020-11-12 09:27:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:27:11,132 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:11,132 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 09:27:11,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:11,334 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash -441408226, now seen corresponding path program 86 times [2020-11-12 09:27:11,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:11,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058927209] [2020-11-12 09:27:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:11,793 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 09:27:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058927209] [2020-11-12 09:27:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144687324] [2020-11-12 09:27:11,793 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:11,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:27:11,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:27:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:27:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:12,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:12,597 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 09:27:12,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:12,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:27:12,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698403813] [2020-11-12 09:27:12,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:27:12,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:27:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:27:12,599 INFO L87 Difference]: Start difference. First operand 2298 states and 2756 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 09:27:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:16,343 INFO L93 Difference]: Finished difference Result 4770 states and 5560 transitions. [2020-11-12 09:27:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 09:27:16,348 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 09:27:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:16,355 INFO L225 Difference]: With dead ends: 4770 [2020-11-12 09:27:16,355 INFO L226 Difference]: Without dead ends: 4612 [2020-11-12 09:27:16,355 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=662, Invalid=2308, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 09:27:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2020-11-12 09:27:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 2298. [2020-11-12 09:27:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2186 states have (on average 1.2607502287282708) internal successors, (2756), 2297 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 2756 transitions. [2020-11-12 09:27:16,397 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 2756 transitions. Word has length 63 [2020-11-12 09:27:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:16,398 INFO L481 AbstractCegarLoop]: Abstraction has 2298 states and 2756 transitions. [2020-11-12 09:27:16,398 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 09:27:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 2756 transitions. [2020-11-12 09:27:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:27:16,400 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:16,400 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 09:27:16,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:16,601 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:16,602 INFO L82 PathProgramCache]: Analyzing trace with hash -730162262, now seen corresponding path program 87 times [2020-11-12 09:27:16,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:16,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444934959] [2020-11-12 09:27:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:17,121 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 09:27:17,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444934959] [2020-11-12 09:27:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059170129] [2020-11-12 09:27:17,122 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:17,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:27:17,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:27:17,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:27:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:17,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:18,062 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 09:27:18,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:18,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:27:18,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995522585] [2020-11-12 09:27:18,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:27:18,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:27:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:27:18,063 INFO L87 Difference]: Start difference. First operand 2298 states and 2756 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 09:27:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:21,844 INFO L93 Difference]: Finished difference Result 4969 states and 5805 transitions. [2020-11-12 09:27:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 09:27:21,848 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 09:27:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:21,854 INFO L225 Difference]: With dead ends: 4969 [2020-11-12 09:27:21,854 INFO L226 Difference]: Without dead ends: 4811 [2020-11-12 09:27:21,854 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=645, Invalid=2217, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:27:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2020-11-12 09:27:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 2293. [2020-11-12 09:27:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2181 states have (on average 1.2585969738651994) internal successors, (2745), 2292 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 2745 transitions. [2020-11-12 09:27:21,894 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 2745 transitions. Word has length 63 [2020-11-12 09:27:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:21,895 INFO L481 AbstractCegarLoop]: Abstraction has 2293 states and 2745 transitions. [2020-11-12 09:27:21,895 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 09:27:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 2745 transitions. [2020-11-12 09:27:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:27:21,897 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:21,897 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 09:27:22,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-11-12 09:27:22,108 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:22,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1543297996, now seen corresponding path program 88 times [2020-11-12 09:27:22,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:22,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155359506] [2020-11-12 09:27:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:22,722 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 09:27:22,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155359506] [2020-11-12 09:27:22,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768745380] [2020-11-12 09:27:22,722 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:22,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:27:22,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:27:22,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:27:22,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:23,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:23,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:23,588 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 09:27:23,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:23,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:27:23,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738716033] [2020-11-12 09:27:23,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:27:23,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:27:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:27:23,591 INFO L87 Difference]: Start difference. First operand 2293 states and 2745 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 09:27:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:31,333 INFO L93 Difference]: Finished difference Result 5612 states and 6548 transitions. [2020-11-12 09:27:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-11-12 09:27:31,338 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 09:27:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:31,345 INFO L225 Difference]: With dead ends: 5612 [2020-11-12 09:27:31,345 INFO L226 Difference]: Without dead ends: 5006 [2020-11-12 09:27:31,346 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2529 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1552, Invalid=5588, Unknown=0, NotChecked=0, Total=7140 [2020-11-12 09:27:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2020-11-12 09:27:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 2294. [2020-11-12 09:27:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2182 states have (on average 1.258936755270394) internal successors, (2747), 2293 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2747 transitions. [2020-11-12 09:27:31,391 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2747 transitions. Word has length 63 [2020-11-12 09:27:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:31,391 INFO L481 AbstractCegarLoop]: Abstraction has 2294 states and 2747 transitions. [2020-11-12 09:27:31,391 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 09:27:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2747 transitions. [2020-11-12 09:27:31,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:27:31,393 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:31,393 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 09:27:31,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:31,594 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1498589236, now seen corresponding path program 89 times [2020-11-12 09:27:31,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:31,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35001742] [2020-11-12 09:27:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:32,222 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 09:27:32,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35001742] [2020-11-12 09:27:32,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840058751] [2020-11-12 09:27:32,223 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:32,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:27:32,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:27:32,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:27:32,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:32,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:33,065 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 09:27:33,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:33,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:27:33,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821065573] [2020-11-12 09:27:33,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:27:33,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:33,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:27:33,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:27:33,066 INFO L87 Difference]: Start difference. First operand 2294 states and 2747 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 09:27:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:37,612 INFO L93 Difference]: Finished difference Result 4909 states and 5741 transitions. [2020-11-12 09:27:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 09:27:37,617 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 09:27:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:37,623 INFO L225 Difference]: With dead ends: 4909 [2020-11-12 09:27:37,623 INFO L226 Difference]: Without dead ends: 4751 [2020-11-12 09:27:37,623 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=762, Invalid=2544, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 09:27:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2020-11-12 09:27:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 2306. [2020-11-12 09:27:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2194 states have (on average 1.2602552415679125) internal successors, (2765), 2305 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 2765 transitions. [2020-11-12 09:27:37,661 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 2765 transitions. Word has length 63 [2020-11-12 09:27:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:37,662 INFO L481 AbstractCegarLoop]: Abstraction has 2306 states and 2765 transitions. [2020-11-12 09:27:37,662 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 09:27:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 2765 transitions. [2020-11-12 09:27:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:27:37,664 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:37,664 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 09:27:37,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-12 09:27:37,867 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:37,868 INFO L82 PathProgramCache]: Analyzing trace with hash -540065346, now seen corresponding path program 90 times [2020-11-12 09:27:37,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:37,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628457305] [2020-11-12 09:27:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:38,469 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 09:27:38,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628457305] [2020-11-12 09:27:38,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992358710] [2020-11-12 09:27:38,470 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:38,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:27:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:27:38,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:27:38,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:39,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:39,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:39,348 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 09:27:39,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:39,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:27:39,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886996636] [2020-11-12 09:27:39,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:27:39,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:39,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:27:39,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:27:39,350 INFO L87 Difference]: Start difference. First operand 2306 states and 2765 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 09:27:42,510 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-11-12 09:27:45,264 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2020-11-12 09:27:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:47,621 INFO L93 Difference]: Finished difference Result 5389 states and 6309 transitions. [2020-11-12 09:27:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-12 09:27:47,626 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 09:27:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:47,631 INFO L225 Difference]: With dead ends: 5389 [2020-11-12 09:27:47,631 INFO L226 Difference]: Without dead ends: 4783 [2020-11-12 09:27:47,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1354, Invalid=4808, Unknown=0, NotChecked=0, Total=6162 [2020-11-12 09:27:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2020-11-12 09:27:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2284. [2020-11-12 09:27:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2172 states have (on average 1.2555248618784531) internal successors, (2727), 2283 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2727 transitions. [2020-11-12 09:27:47,680 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2727 transitions. Word has length 63 [2020-11-12 09:27:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:47,680 INFO L481 AbstractCegarLoop]: Abstraction has 2284 states and 2727 transitions. [2020-11-12 09:27:47,680 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 09:27:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2727 transitions. [2020-11-12 09:27:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:27:47,683 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:47,683 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:27:47,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-12 09:27:47,884 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1714331718, now seen corresponding path program 4 times [2020-11-12 09:27:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315794584] [2020-11-12 09:27:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 94 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:27:48,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315794584] [2020-11-12 09:27:48,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776295586] [2020-11-12 09:27:48,386 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:48,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:27:48,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:27:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:27:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-12 09:27:48,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-12 09:27:48,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [17] total 19 [2020-11-12 09:27:48,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108493917] [2020-11-12 09:27:48,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:27:48,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:48,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:27:48,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:27:48,545 INFO L87 Difference]: Start difference. First operand 2284 states and 2727 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:49,671 INFO L93 Difference]: Finished difference Result 4226 states and 5099 transitions. [2020-11-12 09:27:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 09:27:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 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 68 [2020-11-12 09:27:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:49,685 INFO L225 Difference]: With dead ends: 4226 [2020-11-12 09:27:49,685 INFO L226 Difference]: Without dead ends: 4220 [2020-11-12 09:27:49,686 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:27:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2020-11-12 09:27:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 2486. [2020-11-12 09:27:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2398 states have (on average 1.3386155129274395) internal successors, (3210), 2485 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 3210 transitions. [2020-11-12 09:27:49,792 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 3210 transitions. Word has length 68 [2020-11-12 09:27:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:49,792 INFO L481 AbstractCegarLoop]: Abstraction has 2486 states and 3210 transitions. [2020-11-12 09:27:49,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 3210 transitions. [2020-11-12 09:27:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:27:49,796 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:49,796 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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 09:27:50,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-12 09:27:50,011 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1388837469, now seen corresponding path program 91 times [2020-11-12 09:27:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:50,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145961477] [2020-11-12 09:27:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:27:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145961477] [2020-11-12 09:27:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623836908] [2020-11-12 09:27:50,650 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:27:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:51,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:27:51,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:51,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-11-12 09:27:51,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850298062] [2020-11-12 09:27:51,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:27:51,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:27:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:27:51,669 INFO L87 Difference]: Start difference. First operand 2486 states and 3210 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:27:53,715 INFO L93 Difference]: Finished difference Result 3942 states and 4896 transitions. [2020-11-12 09:27:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:27:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 68 [2020-11-12 09:27:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:27:53,726 INFO L225 Difference]: With dead ends: 3942 [2020-11-12 09:27:53,726 INFO L226 Difference]: Without dead ends: 3809 [2020-11-12 09:27:53,726 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=364, Invalid=1196, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 09:27:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3809 states. [2020-11-12 09:27:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3809 to 2432. [2020-11-12 09:27:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2344 states have (on average 1.3447098976109215) internal successors, (3152), 2431 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 3152 transitions. [2020-11-12 09:27:53,779 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 3152 transitions. Word has length 68 [2020-11-12 09:27:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:27:53,779 INFO L481 AbstractCegarLoop]: Abstraction has 2432 states and 3152 transitions. [2020-11-12 09:27:53,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 3152 transitions. [2020-11-12 09:27:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:27:53,781 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:27:53,781 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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 09:27:53,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:53,982 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:27:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:27:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1527258945, now seen corresponding path program 92 times [2020-11-12 09:27:53,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:27:53,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211190424] [2020-11-12 09:27:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:27:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:27:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:27:54,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211190424] [2020-11-12 09:27:54,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070829399] [2020-11-12 09:27:54,768 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:27:54,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:27:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:27:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:27:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:27:55,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:55,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:55,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:55,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:27:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:27:56,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:27:56,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-11-12 09:27:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162999447] [2020-11-12 09:27:56,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-12 09:27:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:27:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-12 09:27:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:27:56,005 INFO L87 Difference]: Start difference. First operand 2432 states and 3152 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:27:57,409 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-11-12 09:28:00,849 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-11-12 09:28:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:28:01,816 INFO L93 Difference]: Finished difference Result 5047 states and 6241 transitions. [2020-11-12 09:28:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 09:28:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 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 68 [2020-11-12 09:28:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:28:01,829 INFO L225 Difference]: With dead ends: 5047 [2020-11-12 09:28:01,829 INFO L226 Difference]: Without dead ends: 4693 [2020-11-12 09:28:01,830 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=797, Invalid=2985, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 09:28:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2020-11-12 09:28:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 2442. [2020-11-12 09:28:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2354 states have (on average 1.3440951571792694) internal successors, (3164), 2441 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3164 transitions. [2020-11-12 09:28:01,887 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3164 transitions. Word has length 68 [2020-11-12 09:28:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:28:01,887 INFO L481 AbstractCegarLoop]: Abstraction has 2442 states and 3164 transitions. [2020-11-12 09:28:01,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3164 transitions. [2020-11-12 09:28:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:28:01,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:28:01,891 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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 09:28:02,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-11-12 09:28:02,105 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:28:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:28:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash -984015511, now seen corresponding path program 93 times [2020-11-12 09:28:02,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:28:02,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434645788] [2020-11-12 09:28:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:28:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:28:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:02,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434645788] [2020-11-12 09:28:02,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692900611] [2020-11-12 09:28:02,680 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:02,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:28:02,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:28:02,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:28:02,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:28:03,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:03,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:28:03,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-11-12 09:28:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28892783] [2020-11-12 09:28:03,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:28:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:28:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:28:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:28:03,829 INFO L87 Difference]: Start difference. First operand 2442 states and 3164 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:05,179 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-11-12 09:28:06,749 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2020-11-12 09:28:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:28:07,386 INFO L93 Difference]: Finished difference Result 4673 states and 5774 transitions. [2020-11-12 09:28:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:28:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 68 [2020-11-12 09:28:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:28:07,395 INFO L225 Difference]: With dead ends: 4673 [2020-11-12 09:28:07,396 INFO L226 Difference]: Without dead ends: 4505 [2020-11-12 09:28:07,396 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=482, Invalid=1680, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:28:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2020-11-12 09:28:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 2456. [2020-11-12 09:28:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2368 states have (on average 1.3450168918918919) internal successors, (3185), 2455 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3185 transitions. [2020-11-12 09:28:07,427 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3185 transitions. Word has length 68 [2020-11-12 09:28:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:28:07,427 INFO L481 AbstractCegarLoop]: Abstraction has 2456 states and 3185 transitions. [2020-11-12 09:28:07,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3185 transitions. [2020-11-12 09:28:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:28:07,429 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:28:07,429 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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 09:28:07,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:07,630 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:28:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:28:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash 508254169, now seen corresponding path program 94 times [2020-11-12 09:28:07,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:28:07,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072944879] [2020-11-12 09:28:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:28:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:28:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:08,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072944879] [2020-11-12 09:28:08,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912018639] [2020-11-12 09:28:08,365 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:08,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:28:08,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:28:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:28:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:28:09,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:09,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:09,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:09,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:09,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:28:09,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-11-12 09:28:09,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633160238] [2020-11-12 09:28:09,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-12 09:28:09,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:28:09,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-12 09:28:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:28:09,575 INFO L87 Difference]: Start difference. First operand 2456 states and 3185 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:11,020 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-11-12 09:28:11,258 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-11-12 09:28:11,518 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-11-12 09:28:11,737 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2020-11-12 09:28:13,234 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2020-11-12 09:28:15,047 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-11-12 09:28:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:28:17,557 INFO L93 Difference]: Finished difference Result 5675 states and 6991 transitions. [2020-11-12 09:28:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-12 09:28:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 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 68 [2020-11-12 09:28:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:28:17,569 INFO L225 Difference]: With dead ends: 5675 [2020-11-12 09:28:17,569 INFO L226 Difference]: Without dead ends: 5185 [2020-11-12 09:28:17,570 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1125, Invalid=4131, Unknown=0, NotChecked=0, Total=5256 [2020-11-12 09:28:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2020-11-12 09:28:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 2461. [2020-11-12 09:28:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2461 states, 2373 states have (on average 1.3447113358617784) internal successors, (3191), 2460 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3191 transitions. [2020-11-12 09:28:17,613 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 3191 transitions. Word has length 68 [2020-11-12 09:28:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:28:17,613 INFO L481 AbstractCegarLoop]: Abstraction has 2461 states and 3191 transitions. [2020-11-12 09:28:17,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 3191 transitions. [2020-11-12 09:28:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:28:17,615 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:28:17,615 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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 09:28:17,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:17,816 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:28:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:28:17,816 INFO L82 PathProgramCache]: Analyzing trace with hash -744825895, now seen corresponding path program 95 times [2020-11-12 09:28:17,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:28:17,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187821690] [2020-11-12 09:28:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:28:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:28:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:18,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187821690] [2020-11-12 09:28:18,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758441357] [2020-11-12 09:28:18,391 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:18,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:28:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:28:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:28:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:28:19,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:19,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:28:19,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-11-12 09:28:19,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539072234] [2020-11-12 09:28:19,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:28:19,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:28:19,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:28:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:28:19,507 INFO L87 Difference]: Start difference. First operand 2461 states and 3191 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:20,038 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2020-11-12 09:28:20,262 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 16 [2020-11-12 09:28:21,328 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2020-11-12 09:28:23,784 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-11-12 09:28:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:28:24,427 INFO L93 Difference]: Finished difference Result 4446 states and 5465 transitions. [2020-11-12 09:28:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:28:24,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 68 [2020-11-12 09:28:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:28:24,437 INFO L225 Difference]: With dead ends: 4446 [2020-11-12 09:28:24,437 INFO L226 Difference]: Without dead ends: 4288 [2020-11-12 09:28:24,437 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=611, Invalid=2251, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:28:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2020-11-12 09:28:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 2462. [2020-11-12 09:28:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2374 states have (on average 1.3449873631002527) internal successors, (3193), 2461 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3193 transitions. [2020-11-12 09:28:24,468 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3193 transitions. Word has length 68 [2020-11-12 09:28:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:28:24,468 INFO L481 AbstractCegarLoop]: Abstraction has 2462 states and 3193 transitions. [2020-11-12 09:28:24,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3193 transitions. [2020-11-12 09:28:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:28:24,470 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:28:24,471 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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 09:28:24,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:24,684 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:28:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:28:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1511486819, now seen corresponding path program 96 times [2020-11-12 09:28:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:28:24,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991068105] [2020-11-12 09:28:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:28:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:28:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:25,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991068105] [2020-11-12 09:28:25,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70000955] [2020-11-12 09:28:25,336 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:25,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-12 09:28:25,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:28:25,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:28:25,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:28:26,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:26,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:27,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:28:27,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-11-12 09:28:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529982402] [2020-11-12 09:28:27,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-12 09:28:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:28:27,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-12 09:28:27,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:28:27,020 INFO L87 Difference]: Start difference. First operand 2462 states and 3193 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:27,818 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2020-11-12 09:28:30,746 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-11-12 09:28:31,073 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2020-11-12 09:28:32,577 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-11-12 09:28:32,874 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 20 [2020-11-12 09:28:33,349 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2020-11-12 09:28:33,886 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-11-12 09:28:34,171 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-11-12 09:28:35,292 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-11-12 09:28:36,170 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-11-12 09:28:36,464 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-11-12 09:28:37,214 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2020-11-12 09:28:37,737 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-11-12 09:28:38,054 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-11-12 09:28:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:28:39,238 INFO L93 Difference]: Finished difference Result 5012 states and 6190 transitions. [2020-11-12 09:28:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-12 09:28:39,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 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 68 [2020-11-12 09:28:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:28:39,250 INFO L225 Difference]: With dead ends: 5012 [2020-11-12 09:28:39,250 INFO L226 Difference]: Without dead ends: 4760 [2020-11-12 09:28:39,251 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1194, Invalid=4061, Unknown=1, NotChecked=0, Total=5256 [2020-11-12 09:28:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2020-11-12 09:28:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 2460. [2020-11-12 09:28:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2372 states have (on average 1.3448566610455313) internal successors, (3190), 2459 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3190 transitions. [2020-11-12 09:28:39,295 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3190 transitions. Word has length 68 [2020-11-12 09:28:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:28:39,295 INFO L481 AbstractCegarLoop]: Abstraction has 2460 states and 3190 transitions. [2020-11-12 09:28:39,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3190 transitions. [2020-11-12 09:28:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:28:39,298 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:28:39,298 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:28:39,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:39,499 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:28:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:28:39,500 INFO L82 PathProgramCache]: Analyzing trace with hash -641175279, now seen corresponding path program 97 times [2020-11-12 09:28:39,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:28:39,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174597132] [2020-11-12 09:28:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:28:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:28:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174597132] [2020-11-12 09:28:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129105450] [2020-11-12 09:28:40,256 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:28:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:28:40,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:28:40,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:28:45,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:28:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:28:45,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:28:45,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-11-12 09:28:45,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208850073] [2020-11-12 09:28:45,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:28:45,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:28:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:28:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=455, Unknown=2, NotChecked=0, Total=552 [2020-11-12 09:28:45,674 INFO L87 Difference]: Start difference. First operand 2460 states and 3190 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:28:46,440 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2020-11-12 09:28:50,956 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-11-12 09:28:51,358 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2020-11-12 09:28:51,610 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2020-11-12 09:28:54,060 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 43 [2020-11-12 09:28:54,252 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 18 [2020-11-12 09:28:54,574 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-12 09:28:54,827 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 21 [2020-11-12 09:28:57,948 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-11-12 09:29:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:29:01,746 INFO L93 Difference]: Finished difference Result 5222 states and 6465 transitions. [2020-11-12 09:29:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:29:01,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 68 [2020-11-12 09:29:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:29:01,759 INFO L225 Difference]: With dead ends: 5222 [2020-11-12 09:29:01,759 INFO L226 Difference]: Without dead ends: 5044 [2020-11-12 09:29:01,760 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=576, Invalid=1972, Unknown=2, NotChecked=0, Total=2550 [2020-11-12 09:29:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2020-11-12 09:29:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 2482. [2020-11-12 09:29:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2394 states have (on average 1.3467000835421887) internal successors, (3224), 2481 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3224 transitions. [2020-11-12 09:29:01,816 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3224 transitions. Word has length 68 [2020-11-12 09:29:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:29:01,817 INFO L481 AbstractCegarLoop]: Abstraction has 2482 states and 3224 transitions. [2020-11-12 09:29:01,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3224 transitions. [2020-11-12 09:29:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:29:01,819 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:29:01,819 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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 09:29:02,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-11-12 09:29:02,035 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:29:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:29:02,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1644700785, now seen corresponding path program 98 times [2020-11-12 09:29:02,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:29:02,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117151729] [2020-11-12 09:29:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:29:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:29:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:02,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117151729] [2020-11-12 09:29:02,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150745748] [2020-11-12 09:29:02,681 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:29:02,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:29:02,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:29:02,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:29:02,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:29:03,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:03,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:29:03,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-11-12 09:29:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218876718] [2020-11-12 09:29:03,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:29:03,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:29:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:29:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:29:03,770 INFO L87 Difference]: Start difference. First operand 2482 states and 3224 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:04,409 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2020-11-12 09:29:04,818 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-11-12 09:29:05,188 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-11-12 09:29:05,497 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-11-12 09:29:06,298 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2020-11-12 09:29:06,733 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-12 09:29:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:29:07,960 INFO L93 Difference]: Finished difference Result 4433 states and 5512 transitions. [2020-11-12 09:29:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:29:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 68 [2020-11-12 09:29:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:29:07,972 INFO L225 Difference]: With dead ends: 4433 [2020-11-12 09:29:07,972 INFO L226 Difference]: Without dead ends: 4300 [2020-11-12 09:29:07,973 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=510, Invalid=1652, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:29:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2020-11-12 09:29:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 2482. [2020-11-12 09:29:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2394 states have (on average 1.3467000835421887) internal successors, (3224), 2481 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3224 transitions. [2020-11-12 09:29:08,011 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3224 transitions. Word has length 68 [2020-11-12 09:29:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:29:08,012 INFO L481 AbstractCegarLoop]: Abstraction has 2482 states and 3224 transitions. [2020-11-12 09:29:08,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3224 transitions. [2020-11-12 09:29:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:29:08,014 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:29:08,014 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:29:08,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-11-12 09:29:08,215 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:29:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:29:08,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1108852481, now seen corresponding path program 99 times [2020-11-12 09:29:08,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:29:08,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780794023] [2020-11-12 09:29:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:29:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:29:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780794023] [2020-11-12 09:29:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74598544] [2020-11-12 09:29:08,981 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:29:09,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:29:09,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:29:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:29:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:29:10,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:10,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:10,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:10,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:10,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:29:10,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-11-12 09:29:10,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719533649] [2020-11-12 09:29:10,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-12 09:29:10,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:29:10,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-12 09:29:10,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:29:10,496 INFO L87 Difference]: Start difference. First operand 2482 states and 3224 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:11,257 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2020-11-12 09:29:11,460 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2020-11-12 09:29:12,241 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-11-12 09:29:12,474 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-11-12 09:29:12,694 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2020-11-12 09:29:12,975 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-11-12 09:29:13,179 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 15 [2020-11-12 09:29:13,746 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2020-11-12 09:29:13,928 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-11-12 09:29:14,174 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-11-12 09:29:14,892 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2020-11-12 09:29:15,320 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2020-11-12 09:29:15,771 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-12 09:29:16,101 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-11-12 09:29:17,052 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-11-12 09:29:17,340 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 18 [2020-11-12 09:29:17,749 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-11-12 09:29:18,027 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-11-12 09:29:18,307 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-11-12 09:29:18,806 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-11-12 09:29:19,079 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-11-12 09:29:19,349 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2020-11-12 09:29:19,804 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 16 [2020-11-12 09:29:20,463 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-11-12 09:29:21,033 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2020-11-12 09:29:21,472 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-11-12 09:29:21,926 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-11-12 09:29:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:29:23,325 INFO L93 Difference]: Finished difference Result 5951 states and 7365 transitions. [2020-11-12 09:29:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-12 09:29:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 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 68 [2020-11-12 09:29:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:29:23,341 INFO L225 Difference]: With dead ends: 5951 [2020-11-12 09:29:23,342 INFO L226 Difference]: Without dead ends: 5342 [2020-11-12 09:29:23,344 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1530, Invalid=5610, Unknown=0, NotChecked=0, Total=7140 [2020-11-12 09:29:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2020-11-12 09:29:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 2487. [2020-11-12 09:29:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2399 states have (on average 1.346394330971238) internal successors, (3230), 2486 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3230 transitions. [2020-11-12 09:29:23,423 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3230 transitions. Word has length 68 [2020-11-12 09:29:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:29:23,423 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 3230 transitions. [2020-11-12 09:29:23,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3230 transitions. [2020-11-12 09:29:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:29:23,427 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:29:23,427 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:29:23,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-12 09:29:23,642 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:29:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:29:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1933034751, now seen corresponding path program 100 times [2020-11-12 09:29:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:29:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647753273] [2020-11-12 09:29:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:29:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:29:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:24,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647753273] [2020-11-12 09:29:24,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132428126] [2020-11-12 09:29:24,454 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:29:24,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:29:24,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:29:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:29:24,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:29:25,626 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-11-12 09:29:25,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:25,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:29:25,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-11-12 09:29:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846233555] [2020-11-12 09:29:25,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:29:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:29:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:29:25,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:29:25,976 INFO L87 Difference]: Start difference. First operand 2487 states and 3230 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:26,635 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2020-11-12 09:29:26,884 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2020-11-12 09:29:27,338 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-11-12 09:29:27,711 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 15 [2020-11-12 09:29:28,072 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2020-11-12 09:29:28,406 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 18 [2020-11-12 09:29:28,914 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-11-12 09:29:29,157 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 18 [2020-11-12 09:29:33,990 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-11-12 09:29:34,319 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 21 [2020-11-12 09:29:34,549 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-11-12 09:29:34,851 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-11-12 09:29:35,230 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-11-12 09:29:36,721 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-11-12 09:29:37,370 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-11-12 09:29:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:29:42,940 INFO L93 Difference]: Finished difference Result 4817 states and 5986 transitions. [2020-11-12 09:29:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 09:29:42,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 68 [2020-11-12 09:29:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:29:42,953 INFO L225 Difference]: With dead ends: 4817 [2020-11-12 09:29:42,954 INFO L226 Difference]: Without dead ends: 4649 [2020-11-12 09:29:42,955 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=722, Invalid=2584, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 09:29:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2020-11-12 09:29:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 2488. [2020-11-12 09:29:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2400 states have (on average 1.3466666666666667) internal successors, (3232), 2487 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 3232 transitions. [2020-11-12 09:29:42,998 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 3232 transitions. Word has length 68 [2020-11-12 09:29:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:29:42,998 INFO L481 AbstractCegarLoop]: Abstraction has 2488 states and 3232 transitions. [2020-11-12 09:29:42,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 3232 transitions. [2020-11-12 09:29:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-12 09:29:43,001 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:29:43,001 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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 09:29:43,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-12 09:29:43,202 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:29:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:29:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash -105619831, now seen corresponding path program 101 times [2020-11-12 09:29:43,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:29:43,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595975801] [2020-11-12 09:29:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:29:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:29:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:44,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595975801] [2020-11-12 09:29:44,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553954006] [2020-11-12 09:29:44,127 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:29:44,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:29:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:29:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:29:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:29:51,343 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_mod_aux_div_v_~j~0_383_34_33 Int) (aux_div_aux_mod_v_~j~0_383_34_96 Int) (v_~i~0_427 Int) (aux_div_aux_div_v_~j~0_383_34_33 Int)) (let ((.cse0 (* 2 aux_mod_aux_div_v_~j~0_383_34_33))) (let ((.cse3 (+ .cse0 v_~i~0_427)) (.cse2 (* 3 aux_div_aux_mod_v_~j~0_383_34_96)) (.cse1 (* 6 aux_div_aux_div_v_~j~0_383_34_33))) (and (<= 0 aux_mod_aux_div_v_~j~0_383_34_33) (<= (+ .cse0 c_~j~0) (+ v_~i~0_427 .cse1 3)) (< aux_mod_aux_div_v_~j~0_383_34_33 3) (< (+ .cse2 .cse1) .cse3) (<= c_~i~0 (+ c_~j~0 v_~i~0_427)) (< (+ .cse2 c_~j~0) (+ (* 2 v_~i~0_427) 2)) (<= .cse3 (+ .cse2 .cse1 4)) (<= aux_div_aux_div_v_~j~0_383_34_33 1) (<= aux_div_aux_mod_v_~j~0_383_34_96 1))))) is different from true [2020-11-12 09:29:51,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:51,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:29:51,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:29:51,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:29:51,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:29:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:29:51,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:29:51,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-11-12 09:29:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077828368] [2020-11-12 09:29:51,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-12 09:29:51,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:29:51,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-12 09:29:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=421, Unknown=3, NotChecked=44, Total=600 [2020-11-12 09:29:51,760 INFO L87 Difference]: Start difference. First operand 2488 states and 3232 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:29:52,070 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2020-11-12 09:29:52,458 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 12 [2020-11-12 09:29:52,670 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 14 [2020-11-12 09:29:53,082 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 16 [2020-11-12 09:29:53,387 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 13 [2020-11-12 09:29:54,018 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 19 [2020-11-12 09:29:54,279 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-11-12 09:29:54,507 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-11-12 09:29:55,202 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2020-11-12 09:29:58,332 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 22 [2020-11-12 09:29:58,867 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 18 [2020-11-12 09:29:59,239 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 15 [2020-11-12 09:30:06,360 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-11-12 09:30:17,021 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-11-12 09:30:17,290 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2020-11-12 09:30:26,206 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-12 09:30:29,328 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-11-12 09:30:33,983 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-11-12 09:30:35,676 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2020-11-12 09:30:38,142 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-12 09:30:38,462 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2020-11-12 09:30:55,336 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 47 [2020-11-12 09:31:27,425 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-11-12 09:31:42,214 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-11-12 09:31:48,943 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-11-12 09:31:59,916 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-11-12 09:32:08,169 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2020-11-12 09:32:26,396 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-11-12 09:32:35,345 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-11-12 09:32:38,834 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-11-12 09:32:50,288 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-11-12 09:33:01,214 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 13 [2020-11-12 09:33:06,754 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 10 [2020-11-12 09:33:44,042 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-12 09:34:19,215 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 39 Received shutdown request... [2020-11-12 09:34:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 09:34:22,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:34:22,367 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-12 09:34:22,372 WARN L250 ceAbstractionStarter]: Timeout [2020-11-12 09:34:22,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 09:34:22 BasicIcfg [2020-11-12 09:34:22,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 09:34:22,373 INFO L168 Benchmark]: Toolchain (without parser) took 826344.88 ms. Allocated memory was 306.2 MB in the beginning and 383.8 MB in the end (delta: 77.6 MB). Free memory was 280.3 MB in the beginning and 308.9 MB in the end (delta: -28.6 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:22,373 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 306.2 MB. Free memory is still 277.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 09:34:22,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.80 ms. Allocated memory is still 306.2 MB. Free memory was 279.6 MB in the beginning and 282.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:22,374 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.57 ms. Allocated memory is still 306.2 MB. Free memory was 282.8 MB in the beginning and 280.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 09:34:22,374 INFO L168 Benchmark]: Boogie Preprocessor took 30.11 ms. Allocated memory is still 306.2 MB. Free memory was 280.7 MB in the beginning and 279.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:22,375 INFO L168 Benchmark]: RCFGBuilder took 477.30 ms. Allocated memory is still 306.2 MB. Free memory was 279.6 MB in the beginning and 257.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:22,375 INFO L168 Benchmark]: TraceAbstraction took 825116.80 ms. Allocated memory was 306.2 MB in the beginning and 383.8 MB in the end (delta: 77.6 MB). Free memory was 256.6 MB in the beginning and 308.9 MB in the end (delta: -52.3 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:22,377 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 306.2 MB. Free memory is still 277.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 641.80 ms. Allocated memory is still 306.2 MB. Free memory was 279.6 MB in the beginning and 282.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 66.57 ms. Allocated memory is still 306.2 MB. Free memory was 282.8 MB in the beginning and 280.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.11 ms. Allocated memory is still 306.2 MB. Free memory was 280.7 MB in the beginning and 279.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 477.30 ms. Allocated memory is still 306.2 MB. Free memory was 279.6 MB in the beginning and 257.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 825116.80 ms. Allocated memory was 306.2 MB in the beginning and 383.8 MB in the end (delta: 77.6 MB). Free memory was 256.6 MB in the beginning and 308.9 MB in the end (delta: -52.3 MB). Peak memory consumption was 25.7 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 (2488states) and FLOYD_HOARE automaton (currently 48 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 66 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 824.9s, OverallIterations: 127, TraceHistogramMax: 8, AutomataDifference: 661.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.6s, HoareTripleCheckerStatistics: 9841 SDtfs, 98190 SDslu, 120438 SDs, 0 SdLazy, 23701 SolverSat, 11921 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 59.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12486 GetRequests, 6265 SyntacticMatches, 39 SemanticMatches, 6181 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 107624 ImplicationChecksByTransitivity, 664.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7077occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.4s AutomataMinimizationTime, 126 MinimizatonAttempts, 202562 StatesRemovedByMinimization, 126 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 120.0s InterpolantComputationTime, 14682 NumberOfCodeBlocks, 14678 NumberOfCodeBlocksAsserted, 463 NumberOfCheckSat, 14433 ConstructedInterpolants, 20 QuantifiedInterpolants, 7340952 SizeOfPredicates, 505 NumberOfNonLiveVariables, 17342 ConjunctsInSsa, 1638 ConjunctsInUnsatCore, 249 InterpolantComputations, 6 PerfectInterpolantSequences, 213/7072 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