/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-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 21:17:43,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 21:17:43,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 21:17:43,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 21:17:43,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 21:17:43,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 21:17:43,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 21:17:43,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 21:17:43,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 21:17:43,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 21:17:43,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 21:17:43,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 21:17:43,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 21:17:43,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 21:17:43,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 21:17:43,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 21:17:43,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 21:17:43,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 21:17:43,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 21:17:43,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 21:17:43,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 21:17:43,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 21:17:43,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 21:17:43,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 21:17:43,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 21:17:43,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 21:17:43,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 21:17:43,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 21:17:43,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 21:17:43,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 21:17:43,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 21:17:43,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 21:17:43,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 21:17:43,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 21:17:43,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 21:17:43,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 21:17:43,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 21:17:43,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 21:17:43,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 21:17:43,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 21:17:43,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 21:17:43,279 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-SemanticLbe.epf [2020-11-11 21:17:43,334 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 21:17:43,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 21:17:43,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 21:17:43,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 21:17:43,340 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 21:17:43,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 21:17:43,340 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 21:17:43,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 21:17:43,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 21:17:43,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 21:17:43,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 21:17:43,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 21:17:43,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 21:17:43,343 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 21:17:43,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 21:17:43,343 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 21:17:43,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 21:17:43,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 21:17:43,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 21:17:43,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 21:17:43,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 21:17:43,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:17:43,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 21:17:43,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 21:17:43,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 21:17:43,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 21:17:43,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 21:17:43,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 21:17:43,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 21:17:43,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 21:17:43,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 21:17:43,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 21:17:43,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 21:17:43,804 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 21:17:43,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-11-11 21:17:43,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ae0e91b/8aa995794cfc4ad78db26c26c0908440/FLAGc47af5b4e [2020-11-11 21:17:44,719 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 21:17:44,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-11-11 21:17:44,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ae0e91b/8aa995794cfc4ad78db26c26c0908440/FLAGc47af5b4e [2020-11-11 21:17:44,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ae0e91b/8aa995794cfc4ad78db26c26c0908440 [2020-11-11 21:17:44,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 21:17:44,983 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 21:17:44,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:44,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 21:17:44,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 21:17:44,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:44" (1/1) ... [2020-11-11 21:17:45,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5320eaf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:44, skipping insertion in model container [2020-11-11 21:17:45,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:44" (1/1) ... [2020-11-11 21:17:45,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 21:17:45,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 21:17:45,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:45,562 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 21:17:45,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:45,742 INFO L208 MainTranslator]: Completed translation [2020-11-11 21:17:45,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45 WrapperNode [2020-11-11 21:17:45,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:45,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:45,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 21:17:45,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 21:17:45,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:45,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 21:17:45,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 21:17:45,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 21:17:45,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 21:17:45,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 21:17:45,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 21:17:45,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 21:17:45,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:17:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 21:17:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 21:17:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 21:17:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 21:17:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 21:17:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 21:17:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 21:17:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 21:17:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 21:17:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 21:17:45,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 21:17:45,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 21:17:45,914 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 21:17:46,423 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 21:17:46,423 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 21:17:46,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:46 BoogieIcfgContainer [2020-11-11 21:17:46,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 21:17:46,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 21:17:46,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 21:17:46,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 21:17:46,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:17:44" (1/3) ... [2020-11-11 21:17:46,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b41e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:46, skipping insertion in model container [2020-11-11 21:17:46,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (2/3) ... [2020-11-11 21:17:46,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b41e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:46, skipping insertion in model container [2020-11-11 21:17:46,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:46" (3/3) ... [2020-11-11 21:17:46,435 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-11-11 21:17:46,454 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 21:17:46,454 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 21:17:46,458 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 21:17:46,459 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 21:17:46,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,493 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,493 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,494 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,494 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,494 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,494 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,495 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,495 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,495 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,498 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,498 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,501 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,501 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,502 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,502 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,506 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,507 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,507 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,508 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,508 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,508 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,510 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,511 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,520 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,524 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 21:17:46,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 21:17:46,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 21:17:46,562 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 21:17:46,562 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 21:17:46,562 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 21:17:46,563 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 21:17:46,563 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 21:17:46,563 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 21:17:46,563 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 21:17:46,575 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-11 21:17:46,577 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:46,581 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:46,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:46,623 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-11-11 21:17:46,623 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-11 21:17:46,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-11-11 21:17:46,632 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-11-11 21:17:49,136 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-11-11 21:17:49,553 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-11 21:17:49,721 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-11 21:17:50,143 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:17:50,287 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:17:50,610 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:17:50,750 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:17:50,772 INFO L131 LiptonReduction]: Checked pairs total: 1222 [2020-11-11 21:17:50,773 INFO L133 LiptonReduction]: Total number of compositions: 61 [2020-11-11 21:17:50,781 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-11-11 21:17:50,793 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 44 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-11 21:17:50,801 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:50,802 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-11 21:17:50,802 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash -542665776, now seen corresponding path program 1 times [2020-11-11 21:17:50,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:50,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142777661] [2020-11-11 21:17:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142777661] [2020-11-11 21:17:51,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:51,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 21:17:51,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055428866] [2020-11-11 21:17:51,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 21:17:51,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 21:17:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 21:17:51,133 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 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 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:51,212 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-11-11 21:17:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 21:17:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2020-11-11 21:17:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:51,230 INFO L225 Difference]: With dead ends: 83 [2020-11-11 21:17:51,230 INFO L226 Difference]: Without dead ends: 54 [2020-11-11 21:17:51,232 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-11 21:17:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-11-11 21:17:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-11-11 21:17:51,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-11-11 21:17:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,288 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-11-11 21:17:51,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-11-11 21:17:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:17:51,289 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,289 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:51,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 21:17:51,290 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1810228872, now seen corresponding path program 1 times [2020-11-11 21:17:51,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:51,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364795273] [2020-11-11 21:17:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364795273] [2020-11-11 21:17:51,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:51,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:17:51,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793290192] [2020-11-11 21:17:51,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:17:51,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:17:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:51,384 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:51,452 INFO L93 Difference]: Finished difference Result 70 states and 166 transitions. [2020-11-11 21:17:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2020-11-11 21:17:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:51,455 INFO L225 Difference]: With dead ends: 70 [2020-11-11 21:17:51,455 INFO L226 Difference]: Without dead ends: 64 [2020-11-11 21:17:51,456 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:17:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-11 21:17:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-11-11 21:17:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.473684210526316) internal successors, (141), 57 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-11-11 21:17:51,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 8 [2020-11-11 21:17:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,467 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-11-11 21:17:51,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-11-11 21:17:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:17:51,469 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,469 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:51,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 21:17:51,469 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:51,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:51,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1810289415, now seen corresponding path program 1 times [2020-11-11 21:17:51,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:51,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784948715] [2020-11-11 21:17:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784948715] [2020-11-11 21:17:51,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:51,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:17:51,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098343396] [2020-11-11 21:17:51,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:17:51,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:17:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:51,601 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:51,680 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-11-11 21:17:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2020-11-11 21:17:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:51,683 INFO L225 Difference]: With dead ends: 88 [2020-11-11 21:17:51,683 INFO L226 Difference]: Without dead ends: 83 [2020-11-11 21:17:51,683 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:17:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-11 21:17:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2020-11-11 21:17:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-11-11 21:17:51,695 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-11-11 21:17:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,696 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-11-11 21:17:51,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-11-11 21:17:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:17:51,697 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,697 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:51,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 21:17:51,698 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash -282495891, now seen corresponding path program 2 times [2020-11-11 21:17:51,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:51,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287647382] [2020-11-11 21:17:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287647382] [2020-11-11 21:17:51,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199253266] [2020-11-11 21:17:51,823 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 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 [2020-11-11 21:17:51,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:51,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:51,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:17:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:51,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:51,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-11 21:17:51,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743038937] [2020-11-11 21:17:51,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:17:51,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:17:51,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:17:51,991 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:52,128 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-11 21:17:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:52,129 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2020-11-11 21:17:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:52,130 INFO L225 Difference]: With dead ends: 91 [2020-11-11 21:17:52,130 INFO L226 Difference]: Without dead ends: 85 [2020-11-11 21:17:52,131 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:17:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-11 21:17:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2020-11-11 21:17:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.4507042253521125) internal successors, (174), 71 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 174 transitions. [2020-11-11 21:17:52,142 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 174 transitions. Word has length 9 [2020-11-11 21:17:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:52,142 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 174 transitions. [2020-11-11 21:17:52,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 174 transitions. [2020-11-11 21:17:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:17:52,144 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:52,144 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:52,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:52,360 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash -284373685, now seen corresponding path program 2 times [2020-11-11 21:17:52,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:52,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856273137] [2020-11-11 21:17:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:52,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856273137] [2020-11-11 21:17:52,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55675212] [2020-11-11 21:17:52,488 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 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 [2020-11-11 21:17:52,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:52,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:17:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:52,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:52,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:52,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-11 21:17:52,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887033493] [2020-11-11 21:17:52,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:17:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:52,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:17:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:17:52,645 INFO L87 Difference]: Start difference. First operand 72 states and 174 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:52,782 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2020-11-11 21:17:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:52,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2020-11-11 21:17:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:52,784 INFO L225 Difference]: With dead ends: 107 [2020-11-11 21:17:52,785 INFO L226 Difference]: Without dead ends: 102 [2020-11-11 21:17:52,788 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:17:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-11 21:17:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 77. [2020-11-11 21:17:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.5) internal successors, (190), 76 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-11-11 21:17:52,810 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-11-11 21:17:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:52,813 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-11-11 21:17:52,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-11-11 21:17:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:52,816 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:52,816 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:53,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash -167413736, now seen corresponding path program 3 times [2020-11-11 21:17:53,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768410361] [2020-11-11 21:17:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768410361] [2020-11-11 21:17:53,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831678581] [2020-11-11 21:17:53,160 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 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 [2020-11-11 21:17:53,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:17:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:53,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:53,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:53,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:53,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:53,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503878466] [2020-11-11 21:17:53,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:53,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:53,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:53,305 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,493 INFO L93 Difference]: Finished difference Result 104 states and 250 transitions. [2020-11-11 21:17:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:17:53,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:17:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,494 INFO L225 Difference]: With dead ends: 104 [2020-11-11 21:17:53,495 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:17:53,495 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:17:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:17:53,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-11-11 21:17:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.524390243902439) internal successors, (207), 82 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-11-11 21:17:53,513 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 10 [2020-11-11 21:17:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,514 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-11-11 21:17:53,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-11-11 21:17:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,517 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,517 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:53,722 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,723 INFO L82 PathProgramCache]: Analyzing trace with hash -167712607, now seen corresponding path program 1 times [2020-11-11 21:17:53,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286860458] [2020-11-11 21:17:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286860458] [2020-11-11 21:17:53,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864007474] [2020-11-11 21:17:53,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,807 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,921 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2020-11-11 21:17:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:53,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:17:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,922 INFO L225 Difference]: With dead ends: 109 [2020-11-11 21:17:53,923 INFO L226 Difference]: Without dead ends: 104 [2020-11-11 21:17:53,923 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-11 21:17:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2020-11-11 21:17:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5060240963855422) internal successors, (208), 83 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-11-11 21:17:53,931 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 10 [2020-11-11 21:17:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,931 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-11-11 21:17:53,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-11-11 21:17:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,933 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,933 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 21:17:53,933 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,934 INFO L82 PathProgramCache]: Analyzing trace with hash -191723347, now seen corresponding path program 2 times [2020-11-11 21:17:53,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700284148] [2020-11-11 21:17:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700284148] [2020-11-11 21:17:53,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346814057] [2020-11-11 21:17:53,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,992 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:54,056 INFO L93 Difference]: Finished difference Result 100 states and 240 transitions. [2020-11-11 21:17:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:54,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:17:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:54,058 INFO L225 Difference]: With dead ends: 100 [2020-11-11 21:17:54,059 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:17:54,059 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:17:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:17:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2020-11-11 21:17:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.4941176470588236) internal successors, (212), 85 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-11-11 21:17:54,074 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 10 [2020-11-11 21:17:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:54,075 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-11-11 21:17:54,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-11-11 21:17:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:54,080 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:54,081 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:54,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-11 21:17:54,081 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash -176678737, now seen corresponding path program 3 times [2020-11-11 21:17:54,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:54,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191772401] [2020-11-11 21:17:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:54,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191772401] [2020-11-11 21:17:54,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:54,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:54,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989830061] [2020-11-11 21:17:54,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:54,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:54,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:54,188 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:54,309 INFO L93 Difference]: Finished difference Result 115 states and 271 transitions. [2020-11-11 21:17:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:17:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:54,311 INFO L225 Difference]: With dead ends: 115 [2020-11-11 21:17:54,311 INFO L226 Difference]: Without dead ends: 110 [2020-11-11 21:17:54,312 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-11 21:17:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-11-11 21:17:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 216 transitions. [2020-11-11 21:17:54,331 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 216 transitions. Word has length 10 [2020-11-11 21:17:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:54,331 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 216 transitions. [2020-11-11 21:17:54,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 216 transitions. [2020-11-11 21:17:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:54,333 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:54,333 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:54,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-11 21:17:54,333 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:54,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:54,334 INFO L82 PathProgramCache]: Analyzing trace with hash -225626311, now seen corresponding path program 3 times [2020-11-11 21:17:54,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:54,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107984044] [2020-11-11 21:17:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:54,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107984044] [2020-11-11 21:17:54,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769942341] [2020-11-11 21:17:54,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:54,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:17:54,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:54,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:54,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:54,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:54,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70042316] [2020-11-11 21:17:54,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:54,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:54,609 INFO L87 Difference]: Start difference. First operand 89 states and 216 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:54,785 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-11-11 21:17:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:17:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:17:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:54,787 INFO L225 Difference]: With dead ends: 128 [2020-11-11 21:17:54,787 INFO L226 Difference]: Without dead ends: 123 [2020-11-11 21:17:54,787 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:17:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-11 21:17:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2020-11-11 21:17:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 93 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-11-11 21:17:54,794 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-11-11 21:17:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:54,794 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-11-11 21:17:54,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-11-11 21:17:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:54,796 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:54,796 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:54,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:54,997 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -894834227, now seen corresponding path program 4 times [2020-11-11 21:17:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:54,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459533287] [2020-11-11 21:17:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:55,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459533287] [2020-11-11 21:17:55,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654678091] [2020-11-11 21:17:55,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:55,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:55,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:17:55,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:55,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:55,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:55,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:17:55,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212914275] [2020-11-11 21:17:55,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:17:55,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:55,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:17:55,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:17:55,287 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:55,546 INFO L93 Difference]: Finished difference Result 129 states and 307 transitions. [2020-11-11 21:17:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:17:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:17:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:55,548 INFO L225 Difference]: With dead ends: 129 [2020-11-11 21:17:55,548 INFO L226 Difference]: Without dead ends: 123 [2020-11-11 21:17:55,549 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:17:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-11 21:17:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2020-11-11 21:17:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.515151515151515) internal successors, (249), 99 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2020-11-11 21:17:55,560 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 11 [2020-11-11 21:17:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:55,560 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2020-11-11 21:17:55,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2020-11-11 21:17:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:55,562 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:55,562 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:55,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-11 21:17:55,776 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash -895133098, now seen corresponding path program 4 times [2020-11-11 21:17:55,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:55,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346417243] [2020-11-11 21:17:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:55,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346417243] [2020-11-11 21:17:55,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508813293] [2020-11-11 21:17:55,848 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 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 [2020-11-11 21:17:55,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:55,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:55,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:56,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:56,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:56,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109415251] [2020-11-11 21:17:56,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:56,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:56,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:56,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:56,015 INFO L87 Difference]: Start difference. First operand 100 states and 249 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:56,346 INFO L93 Difference]: Finished difference Result 135 states and 320 transitions. [2020-11-11 21:17:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:17:56,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:17:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:56,348 INFO L225 Difference]: With dead ends: 135 [2020-11-11 21:17:56,348 INFO L226 Difference]: Without dead ends: 130 [2020-11-11 21:17:56,348 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:17:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-11 21:17:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2020-11-11 21:17:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.515151515151515) internal successors, (249), 99 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2020-11-11 21:17:56,357 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 11 [2020-11-11 21:17:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:56,357 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2020-11-11 21:17:56,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2020-11-11 21:17:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:56,358 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:56,358 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:56,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:56,560 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash -919143838, now seen corresponding path program 5 times [2020-11-11 21:17:56,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:56,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745891162] [2020-11-11 21:17:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:56,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745891162] [2020-11-11 21:17:56,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90227710] [2020-11-11 21:17:56,637 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 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 [2020-11-11 21:17:56,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:56,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:56,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:56,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:56,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:56,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695771840] [2020-11-11 21:17:56,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:56,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:56,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:56,784 INFO L87 Difference]: Start difference. First operand 100 states and 249 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:56,909 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-11-11 21:17:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:17:56,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:17:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:56,911 INFO L225 Difference]: With dead ends: 126 [2020-11-11 21:17:56,911 INFO L226 Difference]: Without dead ends: 124 [2020-11-11 21:17:56,912 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:17:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-11 21:17:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2020-11-11 21:17:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.5098039215686274) internal successors, (256), 102 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 256 transitions. [2020-11-11 21:17:56,917 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 256 transitions. Word has length 11 [2020-11-11 21:17:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:56,917 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 256 transitions. [2020-11-11 21:17:56,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 256 transitions. [2020-11-11 21:17:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:56,918 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:56,919 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:57,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:57,131 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash -904100189, now seen corresponding path program 6 times [2020-11-11 21:17:57,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:57,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240327032] [2020-11-11 21:17:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:57,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240327032] [2020-11-11 21:17:57,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505161938] [2020-11-11 21:17:57,218 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 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 [2020-11-11 21:17:57,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:17:57,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:57,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:57,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:57,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:57,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:57,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:57,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482030560] [2020-11-11 21:17:57,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:57,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:57,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:57,367 INFO L87 Difference]: Start difference. First operand 103 states and 256 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:57,634 INFO L93 Difference]: Finished difference Result 152 states and 356 transitions. [2020-11-11 21:17:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:17:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:17:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:57,636 INFO L225 Difference]: With dead ends: 152 [2020-11-11 21:17:57,636 INFO L226 Difference]: Without dead ends: 147 [2020-11-11 21:17:57,637 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:17:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-11 21:17:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-11-11 21:17:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.495145631067961) internal successors, (257), 103 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 257 transitions. [2020-11-11 21:17:57,642 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 257 transitions. Word has length 11 [2020-11-11 21:17:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:57,643 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 257 transitions. [2020-11-11 21:17:57,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 257 transitions. [2020-11-11 21:17:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:57,644 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:57,644 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:57,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 21:17:57,857 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash -904099228, now seen corresponding path program 7 times [2020-11-11 21:17:57,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:57,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726452239] [2020-11-11 21:17:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:57,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726452239] [2020-11-11 21:17:57,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906822628] [2020-11-11 21:17:57,933 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 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 [2020-11-11 21:17:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:58,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:58,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:58,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:58,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:58,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:58,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031236512] [2020-11-11 21:17:58,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:58,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:58,081 INFO L87 Difference]: Start difference. First operand 104 states and 257 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:58,448 INFO L93 Difference]: Finished difference Result 166 states and 386 transitions. [2020-11-11 21:17:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:17:58,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:17:58,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:58,450 INFO L225 Difference]: With dead ends: 166 [2020-11-11 21:17:58,451 INFO L226 Difference]: Without dead ends: 158 [2020-11-11 21:17:58,451 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:17:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-11 21:17:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 107. [2020-11-11 21:17:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.4622641509433962) internal successors, (261), 106 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 261 transitions. [2020-11-11 21:17:58,458 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 261 transitions. Word has length 11 [2020-11-11 21:17:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:58,458 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 261 transitions. [2020-11-11 21:17:58,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 261 transitions. [2020-11-11 21:17:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:58,459 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:58,459 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:58,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 21:17:58,673 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1182050219, now seen corresponding path program 8 times [2020-11-11 21:17:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:58,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732065924] [2020-11-11 21:17:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:58,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732065924] [2020-11-11 21:17:58,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217716579] [2020-11-11 21:17:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:58,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:58,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:58,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:58,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:58,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:58,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:58,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:58,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237494239] [2020-11-11 21:17:58,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:58,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:58,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:58,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:58,929 INFO L87 Difference]: Start difference. First operand 107 states and 261 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:59,306 INFO L93 Difference]: Finished difference Result 142 states and 336 transitions. [2020-11-11 21:17:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:17:59,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:17:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:59,308 INFO L225 Difference]: With dead ends: 142 [2020-11-11 21:17:59,308 INFO L226 Difference]: Without dead ends: 137 [2020-11-11 21:17:59,309 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:17:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-11 21:17:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2020-11-11 21:17:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.4622641509433962) internal successors, (261), 106 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 261 transitions. [2020-11-11 21:17:59,315 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 261 transitions. Word has length 11 [2020-11-11 21:17:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:59,315 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 261 transitions. [2020-11-11 21:17:59,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 261 transitions. [2020-11-11 21:17:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:59,316 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:59,316 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:59,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 21:17:59,530 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1595542283, now seen corresponding path program 4 times [2020-11-11 21:17:59,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:59,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132478577] [2020-11-11 21:17:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:59,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132478577] [2020-11-11 21:17:59,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130611123] [2020-11-11 21:17:59,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:17:59,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:59,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:59,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:17:59,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:59,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:59,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:59,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:17:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876810312] [2020-11-11 21:17:59,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:17:59,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:59,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:17:59,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:17:59,773 INFO L87 Difference]: Start difference. First operand 107 states and 261 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:00,038 INFO L93 Difference]: Finished difference Result 150 states and 355 transitions. [2020-11-11 21:18:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:18:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:00,040 INFO L225 Difference]: With dead ends: 150 [2020-11-11 21:18:00,040 INFO L226 Difference]: Without dead ends: 145 [2020-11-11 21:18:00,041 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:18:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-11 21:18:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2020-11-11 21:18:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.517857142857143) internal successors, (282), 112 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-11-11 21:18:00,046 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-11-11 21:18:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:00,047 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-11-11 21:18:00,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-11-11 21:18:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:00,048 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:00,048 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:00,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 21:18:00,260 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1970032968, now seen corresponding path program 5 times [2020-11-11 21:18:00,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:00,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655745206] [2020-11-11 21:18:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:00,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655745206] [2020-11-11 21:18:00,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752697355] [2020-11-11 21:18:00,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:00,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:18:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:18:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:00,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:00,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:00,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:18:00,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690501149] [2020-11-11 21:18:00,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:18:00,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:00,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:18:00,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:18:00,552 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:00,880 INFO L93 Difference]: Finished difference Result 155 states and 369 transitions. [2020-11-11 21:18:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:00,882 INFO L225 Difference]: With dead ends: 155 [2020-11-11 21:18:00,882 INFO L226 Difference]: Without dead ends: 149 [2020-11-11 21:18:00,883 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:18:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-11 21:18:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2020-11-11 21:18:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.5338983050847457) internal successors, (299), 118 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-11-11 21:18:00,889 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 12 [2020-11-11 21:18:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:00,889 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-11-11 21:18:00,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-11-11 21:18:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:00,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:00,890 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:01,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 21:18:01,103 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:01,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1970331839, now seen corresponding path program 9 times [2020-11-11 21:18:01,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:01,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226953788] [2020-11-11 21:18:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226953788] [2020-11-11 21:18:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458114379] [2020-11-11 21:18:01,232 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 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 [2020-11-11 21:18:01,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:01,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:01,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667801578] [2020-11-11 21:18:01,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:01,413 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:01,891 INFO L93 Difference]: Finished difference Result 163 states and 391 transitions. [2020-11-11 21:18:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:18:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:01,893 INFO L225 Difference]: With dead ends: 163 [2020-11-11 21:18:01,893 INFO L226 Difference]: Without dead ends: 158 [2020-11-11 21:18:01,894 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-11-11 21:18:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-11 21:18:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 119. [2020-11-11 21:18:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.5338983050847457) internal successors, (299), 118 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-11-11 21:18:01,899 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 12 [2020-11-11 21:18:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:01,900 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-11-11 21:18:01,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-11-11 21:18:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:01,901 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:01,901 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:02,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:02,103 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1994342579, now seen corresponding path program 10 times [2020-11-11 21:18:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:02,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115794291] [2020-11-11 21:18:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:02,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115794291] [2020-11-11 21:18:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581476394] [2020-11-11 21:18:02,174 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 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 [2020-11-11 21:18:02,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:02,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:02,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:02,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:02,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788680768] [2020-11-11 21:18:02,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:02,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:02,359 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:02,545 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-11-11 21:18:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:18:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:02,548 INFO L225 Difference]: With dead ends: 150 [2020-11-11 21:18:02,548 INFO L226 Difference]: Without dead ends: 148 [2020-11-11 21:18:02,548 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:18:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-11 21:18:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-11-11 21:18:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.53781512605042) internal successors, (302), 119 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 302 transitions. [2020-11-11 21:18:02,555 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 302 transitions. Word has length 12 [2020-11-11 21:18:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:02,555 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 302 transitions. [2020-11-11 21:18:02,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 302 transitions. [2020-11-11 21:18:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:02,556 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:02,556 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:02,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:02,770 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1979298930, now seen corresponding path program 11 times [2020-11-11 21:18:02,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:02,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727682979] [2020-11-11 21:18:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727682979] [2020-11-11 21:18:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31295229] [2020-11-11 21:18:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:02,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:02,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:02,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:02,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:03,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:03,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:03,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:03,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319248915] [2020-11-11 21:18:03,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:03,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:03,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:03,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:03,019 INFO L87 Difference]: Start difference. First operand 120 states and 302 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:03,426 INFO L93 Difference]: Finished difference Result 180 states and 429 transitions. [2020-11-11 21:18:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:03,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:03,429 INFO L225 Difference]: With dead ends: 180 [2020-11-11 21:18:03,429 INFO L226 Difference]: Without dead ends: 172 [2020-11-11 21:18:03,430 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:18:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-11 21:18:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 121. [2020-11-11 21:18:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.525) internal successors, (303), 120 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 303 transitions. [2020-11-11 21:18:03,457 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 303 transitions. Word has length 12 [2020-11-11 21:18:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:03,457 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 303 transitions. [2020-11-11 21:18:03,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 303 transitions. [2020-11-11 21:18:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:03,460 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:03,460 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:03,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-11 21:18:03,661 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1979297969, now seen corresponding path program 12 times [2020-11-11 21:18:03,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:03,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349167814] [2020-11-11 21:18:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:03,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349167814] [2020-11-11 21:18:03,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13934489] [2020-11-11 21:18:03,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:03,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:18:03,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:03,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:03,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:07,068 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-11 21:18:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:07,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:07,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-11-11 21:18:07,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488218661] [2020-11-11 21:18:07,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:18:07,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:18:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2020-11-11 21:18:07,072 INFO L87 Difference]: Start difference. First operand 121 states and 303 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:09,318 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-11 21:18:13,502 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-11-11 21:18:15,601 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-11 21:18:31,866 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-11 21:18:40,132 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-11 21:19:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:34,048 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-11-11 21:19:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:19:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:34,050 INFO L225 Difference]: With dead ends: 189 [2020-11-11 21:19:34,050 INFO L226 Difference]: Without dead ends: 184 [2020-11-11 21:19:34,051 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=277, Invalid=705, Unknown=10, NotChecked=0, Total=992 [2020-11-11 21:19:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-11 21:19:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 121. [2020-11-11 21:19:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.525) internal successors, (303), 120 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 303 transitions. [2020-11-11 21:19:34,057 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 303 transitions. Word has length 12 [2020-11-11 21:19:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:34,057 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 303 transitions. [2020-11-11 21:19:34,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 303 transitions. [2020-11-11 21:19:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:34,058 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:34,058 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:34,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:34,272 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:34,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1571312207, now seen corresponding path program 13 times [2020-11-11 21:19:34,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:34,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370867111] [2020-11-11 21:19:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370867111] [2020-11-11 21:19:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013011154] [2020-11-11 21:19:34,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:34,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:34,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:34,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862606832] [2020-11-11 21:19:34,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:34,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:34,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:34,508 INFO L87 Difference]: Start difference. First operand 121 states and 303 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:34,700 INFO L93 Difference]: Finished difference Result 156 states and 371 transitions. [2020-11-11 21:19:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:19:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:34,702 INFO L225 Difference]: With dead ends: 156 [2020-11-11 21:19:34,702 INFO L226 Difference]: Without dead ends: 154 [2020-11-11 21:19:34,702 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:19:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-11 21:19:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-11-11 21:19:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.5203252032520327) internal successors, (310), 123 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 310 transitions. [2020-11-11 21:19:34,708 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 310 transitions. Word has length 12 [2020-11-11 21:19:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:34,708 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 310 transitions. [2020-11-11 21:19:34,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 310 transitions. [2020-11-11 21:19:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:34,709 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:34,709 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:34,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 21:19:34,923 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:34,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2037689506, now seen corresponding path program 14 times [2020-11-11 21:19:34,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:34,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205424718] [2020-11-11 21:19:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205424718] [2020-11-11 21:19:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955982604] [2020-11-11 21:19:35,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:35,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:35,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:35,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:35,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:35,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:35,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:35,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321914898] [2020-11-11 21:19:35,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:35,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:35,217 INFO L87 Difference]: Start difference. First operand 124 states and 310 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:35,849 INFO L93 Difference]: Finished difference Result 206 states and 484 transitions. [2020-11-11 21:19:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:35,851 INFO L225 Difference]: With dead ends: 206 [2020-11-11 21:19:35,851 INFO L226 Difference]: Without dead ends: 198 [2020-11-11 21:19:35,852 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-11 21:19:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 126. [2020-11-11 21:19:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.512) internal successors, (314), 125 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 314 transitions. [2020-11-11 21:19:35,859 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 314 transitions. Word has length 12 [2020-11-11 21:19:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:35,859 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 314 transitions. [2020-11-11 21:19:35,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 314 transitions. [2020-11-11 21:19:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:35,863 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:35,863 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:36,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 21:19:36,064 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:36,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2037718336, now seen corresponding path program 15 times [2020-11-11 21:19:36,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:36,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023720271] [2020-11-11 21:19:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:36,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023720271] [2020-11-11 21:19:36,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839867347] [2020-11-11 21:19:36,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:36,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:19:36,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:36,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:36,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:36,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:36,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:36,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490692488] [2020-11-11 21:19:36,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:36,313 INFO L87 Difference]: Start difference. First operand 126 states and 314 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:36,792 INFO L93 Difference]: Finished difference Result 212 states and 497 transitions. [2020-11-11 21:19:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:36,795 INFO L225 Difference]: With dead ends: 212 [2020-11-11 21:19:36,795 INFO L226 Difference]: Without dead ends: 204 [2020-11-11 21:19:36,796 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-11 21:19:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2020-11-11 21:19:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.5511811023622046) internal successors, (324), 127 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 324 transitions. [2020-11-11 21:19:36,802 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 324 transitions. Word has length 12 [2020-11-11 21:19:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:36,804 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 324 transitions. [2020-11-11 21:19:36,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 324 transitions. [2020-11-11 21:19:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:36,813 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:36,813 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:37,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 21:19:37,028 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:37,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2037719297, now seen corresponding path program 16 times [2020-11-11 21:19:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:37,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385105684] [2020-11-11 21:19:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:37,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385105684] [2020-11-11 21:19:37,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212990152] [2020-11-11 21:19:37,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:37,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:37,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:37,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:37,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75943264] [2020-11-11 21:19:37,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:37,271 INFO L87 Difference]: Start difference. First operand 128 states and 324 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:37,894 INFO L93 Difference]: Finished difference Result 212 states and 495 transitions. [2020-11-11 21:19:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:37,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:37,897 INFO L225 Difference]: With dead ends: 212 [2020-11-11 21:19:37,897 INFO L226 Difference]: Without dead ends: 204 [2020-11-11 21:19:37,898 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-11 21:19:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 127. [2020-11-11 21:19:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.507936507936508) internal successors, (316), 126 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 316 transitions. [2020-11-11 21:19:37,904 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 316 transitions. Word has length 12 [2020-11-11 21:19:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:37,904 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 316 transitions. [2020-11-11 21:19:37,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 316 transitions. [2020-11-11 21:19:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:37,905 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:37,905 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:38,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 21:19:38,118 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash 437459916, now seen corresponding path program 17 times [2020-11-11 21:19:38,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:38,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892486118] [2020-11-11 21:19:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892486118] [2020-11-11 21:19:38,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917155914] [2020-11-11 21:19:38,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:38,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:38,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:38,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:38,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:38,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223297252] [2020-11-11 21:19:38,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:38,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:38,381 INFO L87 Difference]: Start difference. First operand 127 states and 316 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:38,532 INFO L93 Difference]: Finished difference Result 162 states and 386 transitions. [2020-11-11 21:19:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:19:38,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:38,534 INFO L225 Difference]: With dead ends: 162 [2020-11-11 21:19:38,534 INFO L226 Difference]: Without dead ends: 160 [2020-11-11 21:19:38,535 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-11 21:19:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2020-11-11 21:19:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.515625) internal successors, (322), 128 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 322 transitions. [2020-11-11 21:19:38,547 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 322 transitions. Word has length 12 [2020-11-11 21:19:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:38,547 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 322 transitions. [2020-11-11 21:19:38,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 322 transitions. [2020-11-11 21:19:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:38,548 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:38,548 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:38,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 21:19:38,760 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:38,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2011173168, now seen corresponding path program 18 times [2020-11-11 21:19:38,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:38,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028315937] [2020-11-11 21:19:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028315937] [2020-11-11 21:19:38,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637002209] [2020-11-11 21:19:38,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:38,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:19:38,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:38,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:38,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:38,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250402239] [2020-11-11 21:19:38,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:38,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:38,998 INFO L87 Difference]: Start difference. First operand 129 states and 322 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:39,523 INFO L93 Difference]: Finished difference Result 178 states and 422 transitions. [2020-11-11 21:19:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:39,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:39,528 INFO L225 Difference]: With dead ends: 178 [2020-11-11 21:19:39,528 INFO L226 Difference]: Without dead ends: 173 [2020-11-11 21:19:39,529 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-11 21:19:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2020-11-11 21:19:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.467741935483871) internal successors, (306), 124 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 306 transitions. [2020-11-11 21:19:39,534 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 306 transitions. Word has length 12 [2020-11-11 21:19:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:39,534 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 306 transitions. [2020-11-11 21:19:39,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 306 transitions. [2020-11-11 21:19:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:39,535 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:39,535 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:39,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:39,748 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2077773447, now seen corresponding path program 5 times [2020-11-11 21:19:39,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:39,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765961147] [2020-11-11 21:19:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765961147] [2020-11-11 21:19:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349859087] [2020-11-11 21:19:39,831 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 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 [2020-11-11 21:19:39,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:19:39,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:39,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:40,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:40,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:40,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889823289] [2020-11-11 21:19:40,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:40,012 INFO L87 Difference]: Start difference. First operand 125 states and 306 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:40,357 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-11-11 21:19:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:19:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:19:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:40,361 INFO L225 Difference]: With dead ends: 173 [2020-11-11 21:19:40,361 INFO L226 Difference]: Without dead ends: 168 [2020-11-11 21:19:40,362 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:19:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-11 21:19:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 132. [2020-11-11 21:19:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5343511450381677) internal successors, (332), 131 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-11 21:19:40,366 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-11-11 21:19:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:40,367 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-11 21:19:40,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-11 21:19:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:40,367 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:40,368 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:40,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 21:19:40,581 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash -941455571, now seen corresponding path program 6 times [2020-11-11 21:19:40,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:40,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859617755] [2020-11-11 21:19:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:40,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859617755] [2020-11-11 21:19:40,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863512143] [2020-11-11 21:19:40,681 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 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 [2020-11-11 21:19:40,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:19:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:40,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:40,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:40,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:19:40,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697775549] [2020-11-11 21:19:40,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:19:40,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:40,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:19:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:40,899 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:41,315 INFO L93 Difference]: Finished difference Result 181 states and 431 transitions. [2020-11-11 21:19:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:19:41,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:41,317 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:19:41,317 INFO L226 Difference]: Without dead ends: 175 [2020-11-11 21:19:41,318 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-11 21:19:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2020-11-11 21:19:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:41,323 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:41,324 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:41,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:41,325 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:41,326 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:41,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:41,538 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash -941754442, now seen corresponding path program 19 times [2020-11-11 21:19:41,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:41,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336660121] [2020-11-11 21:19:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:41,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336660121] [2020-11-11 21:19:41,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063886706] [2020-11-11 21:19:41,634 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 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 [2020-11-11 21:19:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:41,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:41,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:41,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:41,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:41,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34190120] [2020-11-11 21:19:41,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:41,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:41,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:41,823 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:42,472 INFO L93 Difference]: Finished difference Result 191 states and 459 transitions. [2020-11-11 21:19:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:19:42,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:42,475 INFO L225 Difference]: With dead ends: 191 [2020-11-11 21:19:42,475 INFO L226 Difference]: Without dead ends: 186 [2020-11-11 21:19:42,476 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=751, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-11 21:19:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 138. [2020-11-11 21:19:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:42,480 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:42,481 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:42,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:42,482 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:42,482 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:42,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-11 21:19:42,693 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash -965765182, now seen corresponding path program 20 times [2020-11-11 21:19:42,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:42,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788074638] [2020-11-11 21:19:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788074638] [2020-11-11 21:19:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395696945] [2020-11-11 21:19:42,776 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 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 [2020-11-11 21:19:42,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:42,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:42,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:42,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:42,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:42,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021049950] [2020-11-11 21:19:42,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:42,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:42,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:42,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:42,998 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:43,253 INFO L93 Difference]: Finished difference Result 175 states and 419 transitions. [2020-11-11 21:19:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:19:43,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:43,255 INFO L225 Difference]: With dead ends: 175 [2020-11-11 21:19:43,256 INFO L226 Difference]: Without dead ends: 173 [2020-11-11 21:19:43,256 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:19:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-11 21:19:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2020-11-11 21:19:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:43,261 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:43,261 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:43,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:43,262 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:43,262 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:43,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:43,472 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash -950721533, now seen corresponding path program 21 times [2020-11-11 21:19:43,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:43,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638302900] [2020-11-11 21:19:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638302900] [2020-11-11 21:19:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995542286] [2020-11-11 21:19:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:43,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:19:43,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:43,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:43,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:43,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:43,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:43,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066010927] [2020-11-11 21:19:43,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:43,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:43,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:43,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:43,793 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:44,626 INFO L93 Difference]: Finished difference Result 204 states and 492 transitions. [2020-11-11 21:19:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:44,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:44,628 INFO L225 Difference]: With dead ends: 204 [2020-11-11 21:19:44,628 INFO L226 Difference]: Without dead ends: 199 [2020-11-11 21:19:44,629 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:19:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-11 21:19:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2020-11-11 21:19:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:44,633 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:44,633 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:44,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:44,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:44,634 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:44,634 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:44,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-11 21:19:44,835 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash -950720572, now seen corresponding path program 22 times [2020-11-11 21:19:44,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:44,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290735915] [2020-11-11 21:19:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:44,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290735915] [2020-11-11 21:19:44,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970681192] [2020-11-11 21:19:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:44,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:44,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:45,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:48,263 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-11 21:19:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:48,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:48,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-11-11 21:19:48,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877376176] [2020-11-11 21:19:48,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:19:48,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:19:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=185, Unknown=1, NotChecked=0, Total=240 [2020-11-11 21:19:48,266 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:51,613 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-11-11 21:19:52,920 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-11 21:20:05,832 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-11 21:20:41,918 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-11-11 21:21:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:04,552 INFO L93 Difference]: Finished difference Result 223 states and 532 transitions. [2020-11-11 21:21:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:04,587 INFO L225 Difference]: With dead ends: 223 [2020-11-11 21:21:04,587 INFO L226 Difference]: Without dead ends: 218 [2020-11-11 21:21:04,588 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=401, Invalid=1072, Unknown=9, NotChecked=0, Total=1482 [2020-11-11 21:21:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-11 21:21:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 138. [2020-11-11 21:21:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:21:04,593 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:21:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:04,594 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:21:04,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:21:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:04,594 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:04,595 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:04,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:04,806 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:04,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1695078653, now seen corresponding path program 23 times [2020-11-11 21:21:04,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:04,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102232803] [2020-11-11 21:21:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:04,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102232803] [2020-11-11 21:21:04,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290390575] [2020-11-11 21:21:04,907 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 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 [2020-11-11 21:21:04,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:04,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:05,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:05,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:05,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868700223] [2020-11-11 21:21:05,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:05,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:05,164 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:05,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:05,461 INFO L93 Difference]: Finished difference Result 181 states and 432 transitions. [2020-11-11 21:21:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:21:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:05,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:05,464 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:21:05,464 INFO L226 Difference]: Without dead ends: 179 [2020-11-11 21:21:05,464 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:21:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-11 21:21:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2020-11-11 21:21:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.553956834532374) internal successors, (355), 139 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 355 transitions. [2020-11-11 21:21:05,472 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 355 transitions. Word has length 13 [2020-11-11 21:21:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:05,473 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 355 transitions. [2020-11-11 21:21:05,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 355 transitions. [2020-11-11 21:21:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:05,474 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:05,474 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:05,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-11 21:21:05,689 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1695077692, now seen corresponding path program 24 times [2020-11-11 21:21:05,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:05,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98315959] [2020-11-11 21:21:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:05,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98315959] [2020-11-11 21:21:05,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735336475] [2020-11-11 21:21:05,789 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 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 [2020-11-11 21:21:05,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:05,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:05,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:06,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:06,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:06,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906321804] [2020-11-11 21:21:06,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:06,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:06,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:06,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:06,033 INFO L87 Difference]: Start difference. First operand 140 states and 355 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:06,320 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-11-11 21:21:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:21:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:06,322 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:21:06,323 INFO L226 Difference]: Without dead ends: 179 [2020-11-11 21:21:06,323 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:21:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-11 21:21:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2020-11-11 21:21:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.553956834532374) internal successors, (355), 139 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 355 transitions. [2020-11-11 21:21:06,328 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 355 transitions. Word has length 13 [2020-11-11 21:21:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:06,329 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 355 transitions. [2020-11-11 21:21:06,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 355 transitions. [2020-11-11 21:21:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:06,329 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:06,330 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:06,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:06,533 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1228701354, now seen corresponding path program 25 times [2020-11-11 21:21:06,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:06,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494769233] [2020-11-11 21:21:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:06,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494769233] [2020-11-11 21:21:06,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799114349] [2020-11-11 21:21:06,632 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 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 [2020-11-11 21:21:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:06,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:06,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:06,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:06,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090772672] [2020-11-11 21:21:06,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:06,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:06,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:06,866 INFO L87 Difference]: Start difference. First operand 140 states and 355 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:07,616 INFO L93 Difference]: Finished difference Result 216 states and 517 transitions. [2020-11-11 21:21:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:21:07,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:07,618 INFO L225 Difference]: With dead ends: 216 [2020-11-11 21:21:07,618 INFO L226 Difference]: Without dead ends: 208 [2020-11-11 21:21:07,619 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=740, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:21:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-11 21:21:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 141. [2020-11-11 21:21:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.5428571428571427) internal successors, (356), 140 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 356 transitions. [2020-11-11 21:21:07,626 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 356 transitions. Word has length 13 [2020-11-11 21:21:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:07,627 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 356 transitions. [2020-11-11 21:21:07,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 356 transitions. [2020-11-11 21:21:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:07,628 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:07,628 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:07,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-11 21:21:07,829 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1228700393, now seen corresponding path program 26 times [2020-11-11 21:21:07,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:07,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238035142] [2020-11-11 21:21:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:07,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238035142] [2020-11-11 21:21:07,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275402858] [2020-11-11 21:21:07,928 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 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 [2020-11-11 21:21:08,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:08,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:08,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:08,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:08,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158050828] [2020-11-11 21:21:08,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:08,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:08,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:08,322 INFO L87 Difference]: Start difference. First operand 141 states and 356 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:09,241 INFO L93 Difference]: Finished difference Result 236 states and 571 transitions. [2020-11-11 21:21:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:09,243 INFO L225 Difference]: With dead ends: 236 [2020-11-11 21:21:09,243 INFO L226 Difference]: Without dead ends: 228 [2020-11-11 21:21:09,244 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-11 21:21:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 143. [2020-11-11 21:21:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.5774647887323945) internal successors, (366), 142 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 366 transitions. [2020-11-11 21:21:09,250 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 366 transitions. Word has length 13 [2020-11-11 21:21:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:09,250 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 366 transitions. [2020-11-11 21:21:09,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 366 transitions. [2020-11-11 21:21:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:09,251 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:09,251 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:09,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 21:21:09,464 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:09,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1228671563, now seen corresponding path program 27 times [2020-11-11 21:21:09,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:09,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828886922] [2020-11-11 21:21:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:09,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828886922] [2020-11-11 21:21:09,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504244511] [2020-11-11 21:21:09,562 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 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 [2020-11-11 21:21:09,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:21:09,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:09,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:09,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:09,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:09,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400369611] [2020-11-11 21:21:09,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:09,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:09,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:09,878 INFO L87 Difference]: Start difference. First operand 143 states and 366 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:10,785 INFO L93 Difference]: Finished difference Result 218 states and 528 transitions. [2020-11-11 21:21:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:10,787 INFO L225 Difference]: With dead ends: 218 [2020-11-11 21:21:10,787 INFO L226 Difference]: Without dead ends: 213 [2020-11-11 21:21:10,788 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:10,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-11 21:21:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 144. [2020-11-11 21:21:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5944055944055946) internal successors, (371), 143 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 371 transitions. [2020-11-11 21:21:10,797 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 371 transitions. Word has length 13 [2020-11-11 21:21:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:10,797 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 371 transitions. [2020-11-11 21:21:10,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 371 transitions. [2020-11-11 21:21:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:10,798 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:10,798 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:11,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 21:21:11,009 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1228670602, now seen corresponding path program 28 times [2020-11-11 21:21:11,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:11,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012069101] [2020-11-11 21:21:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:11,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012069101] [2020-11-11 21:21:11,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550095040] [2020-11-11 21:21:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:11,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:11,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:11,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:11,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:11,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080454791] [2020-11-11 21:21:11,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:11,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:11,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:11,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:11,448 INFO L87 Difference]: Start difference. First operand 144 states and 371 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:12,242 INFO L93 Difference]: Finished difference Result 216 states and 525 transitions. [2020-11-11 21:21:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:12,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:12,245 INFO L225 Difference]: With dead ends: 216 [2020-11-11 21:21:12,246 INFO L226 Difference]: Without dead ends: 211 [2020-11-11 21:21:12,246 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-11 21:21:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 143. [2020-11-11 21:21:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.5774647887323945) internal successors, (366), 142 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 366 transitions. [2020-11-11 21:21:12,250 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 366 transitions. Word has length 13 [2020-11-11 21:21:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:12,250 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 366 transitions. [2020-11-11 21:21:12,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 366 transitions. [2020-11-11 21:21:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:12,251 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:12,251 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:12,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 21:21:12,452 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1466008483, now seen corresponding path program 29 times [2020-11-11 21:21:12,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:12,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178987120] [2020-11-11 21:21:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:12,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178987120] [2020-11-11 21:21:12,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852790546] [2020-11-11 21:21:12,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:12,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:12,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:12,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:12,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:12,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:12,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313844657] [2020-11-11 21:21:12,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:12,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:12,758 INFO L87 Difference]: Start difference. First operand 143 states and 366 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:13,034 INFO L93 Difference]: Finished difference Result 191 states and 461 transitions. [2020-11-11 21:21:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:13,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:13,036 INFO L225 Difference]: With dead ends: 191 [2020-11-11 21:21:13,037 INFO L226 Difference]: Without dead ends: 189 [2020-11-11 21:21:13,037 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:21:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-11 21:21:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 149. [2020-11-11 21:21:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.5945945945945947) internal successors, (384), 148 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:13,041 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:13,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:13,041 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:13,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:13,041 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:13,041 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:13,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:13,242 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1466037313, now seen corresponding path program 30 times [2020-11-11 21:21:13,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:13,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111931499] [2020-11-11 21:21:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:13,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111931499] [2020-11-11 21:21:13,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034255327] [2020-11-11 21:21:13,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:13,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:13,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:13,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:13,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:13,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517801753] [2020-11-11 21:21:13,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:13,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:13,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:13,579 INFO L87 Difference]: Start difference. First operand 149 states and 384 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:13,848 INFO L93 Difference]: Finished difference Result 195 states and 469 transitions. [2020-11-11 21:21:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:13,850 INFO L225 Difference]: With dead ends: 195 [2020-11-11 21:21:13,850 INFO L226 Difference]: Without dead ends: 193 [2020-11-11 21:21:13,850 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:21:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-11 21:21:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-11-11 21:21:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.5945945945945947) internal successors, (384), 148 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:13,855 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:13,855 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:13,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:13,856 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:13,856 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:14,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-11 21:21:14,057 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:14,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:14,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1256111422, now seen corresponding path program 31 times [2020-11-11 21:21:14,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:14,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031062260] [2020-11-11 21:21:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:14,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031062260] [2020-11-11 21:21:14,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595572714] [2020-11-11 21:21:14,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:14,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:14,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:14,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:14,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526371863] [2020-11-11 21:21:14,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:14,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:14,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:14,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:14,433 INFO L87 Difference]: Start difference. First operand 149 states and 384 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:15,394 INFO L93 Difference]: Finished difference Result 258 states and 616 transitions. [2020-11-11 21:21:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:15,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:15,395 INFO L225 Difference]: With dead ends: 258 [2020-11-11 21:21:15,396 INFO L226 Difference]: Without dead ends: 250 [2020-11-11 21:21:15,396 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=1032, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-11 21:21:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-11-11 21:21:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.5945945945945947) internal successors, (384), 148 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:15,401 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:15,401 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:15,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:15,402 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:15,402 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:15,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 21:21:15,613 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1256110461, now seen corresponding path program 32 times [2020-11-11 21:21:15,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:15,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561323538] [2020-11-11 21:21:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:15,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561323538] [2020-11-11 21:21:15,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550935659] [2020-11-11 21:21:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:15,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:15,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:15,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:15,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:15,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:15,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:15,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867347857] [2020-11-11 21:21:15,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:15,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:15,973 INFO L87 Difference]: Start difference. First operand 149 states and 384 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:16,968 INFO L93 Difference]: Finished difference Result 250 states and 601 transitions. [2020-11-11 21:21:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:16,970 INFO L225 Difference]: With dead ends: 250 [2020-11-11 21:21:16,970 INFO L226 Difference]: Without dead ends: 242 [2020-11-11 21:21:16,971 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=1215, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-11 21:21:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 145. [2020-11-11 21:21:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.6180555555555554) internal successors, (377), 144 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-11 21:21:16,977 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 13 [2020-11-11 21:21:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:16,977 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-11 21:21:16,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-11 21:21:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:16,978 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:16,978 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:17,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:17,188 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1255217692, now seen corresponding path program 33 times [2020-11-11 21:21:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:17,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912378627] [2020-11-11 21:21:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:17,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912378627] [2020-11-11 21:21:17,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811725115] [2020-11-11 21:21:17,290 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 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 [2020-11-11 21:21:17,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:21:17,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:17,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:17,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:17,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:17,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:17,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:17,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816221348] [2020-11-11 21:21:17,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:17,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:17,505 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:18,369 INFO L93 Difference]: Finished difference Result 262 states and 632 transitions. [2020-11-11 21:21:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:21:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:18,373 INFO L225 Difference]: With dead ends: 262 [2020-11-11 21:21:18,373 INFO L226 Difference]: Without dead ends: 254 [2020-11-11 21:21:18,374 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-11-11 21:21:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 148. [2020-11-11 21:21:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6666666666666665) internal successors, (392), 147 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 392 transitions. [2020-11-11 21:21:18,379 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 392 transitions. Word has length 13 [2020-11-11 21:21:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:18,379 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 392 transitions. [2020-11-11 21:21:18,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 392 transitions. [2020-11-11 21:21:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:18,380 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:18,380 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:18,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-11 21:21:18,594 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1255216731, now seen corresponding path program 34 times [2020-11-11 21:21:18,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:18,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535081820] [2020-11-11 21:21:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535081820] [2020-11-11 21:21:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380546959] [2020-11-11 21:21:18,693 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 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 [2020-11-11 21:21:18,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:18,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:18,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:18,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:18,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:18,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:18,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118805558] [2020-11-11 21:21:18,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:18,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:18,903 INFO L87 Difference]: Start difference. First operand 148 states and 392 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:19,710 INFO L93 Difference]: Finished difference Result 256 states and 629 transitions. [2020-11-11 21:21:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:19,713 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:21:19,713 INFO L226 Difference]: Without dead ends: 248 [2020-11-11 21:21:19,714 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:21:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-11-11 21:21:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 143. [2020-11-11 21:21:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.6549295774647885) internal successors, (377), 142 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 377 transitions. [2020-11-11 21:21:19,719 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 377 transitions. Word has length 13 [2020-11-11 21:21:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:19,719 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 377 transitions. [2020-11-11 21:21:19,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 377 transitions. [2020-11-11 21:21:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:19,720 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:19,720 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:19,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:19,933 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1255187901, now seen corresponding path program 35 times [2020-11-11 21:21:19,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:19,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30806698] [2020-11-11 21:21:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:20,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30806698] [2020-11-11 21:21:20,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773093209] [2020-11-11 21:21:20,036 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 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 [2020-11-11 21:21:20,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:20,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:20,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:20,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:20,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:20,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:20,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240859675] [2020-11-11 21:21:20,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:20,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:20,248 INFO L87 Difference]: Start difference. First operand 143 states and 377 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:21,241 INFO L93 Difference]: Finished difference Result 234 states and 568 transitions. [2020-11-11 21:21:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:21,244 INFO L225 Difference]: With dead ends: 234 [2020-11-11 21:21:21,245 INFO L226 Difference]: Without dead ends: 226 [2020-11-11 21:21:21,246 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 21:21:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-11 21:21:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143. [2020-11-11 21:21:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.6549295774647885) internal successors, (377), 142 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 377 transitions. [2020-11-11 21:21:21,250 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 377 transitions. Word has length 13 [2020-11-11 21:21:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:21,250 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 377 transitions. [2020-11-11 21:21:21,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 377 transitions. [2020-11-11 21:21:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:21,251 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:21,251 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:21,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-11 21:21:21,463 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash 675431139, now seen corresponding path program 36 times [2020-11-11 21:21:21,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:21,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49251255] [2020-11-11 21:21:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:21,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49251255] [2020-11-11 21:21:21,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641347005] [2020-11-11 21:21:21,553 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 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 [2020-11-11 21:21:21,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:21,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:21,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:21,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:21,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608985109] [2020-11-11 21:21:21,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:21,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:21,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:21,779 INFO L87 Difference]: Start difference. First operand 143 states and 377 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:21,957 INFO L93 Difference]: Finished difference Result 182 states and 456 transitions. [2020-11-11 21:21:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:21:21,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:21,959 INFO L225 Difference]: With dead ends: 182 [2020-11-11 21:21:21,959 INFO L226 Difference]: Without dead ends: 180 [2020-11-11 21:21:21,959 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-11 21:21:21,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2020-11-11 21:21:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.6554054054054053) internal successors, (393), 148 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 393 transitions. [2020-11-11 21:21:21,964 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 393 transitions. Word has length 13 [2020-11-11 21:21:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:21,964 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 393 transitions. [2020-11-11 21:21:21,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 393 transitions. [2020-11-11 21:21:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:21,965 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:21,965 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:22,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:22,178 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash 676385412, now seen corresponding path program 37 times [2020-11-11 21:21:22,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:22,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874530612] [2020-11-11 21:21:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:22,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874530612] [2020-11-11 21:21:22,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358759228] [2020-11-11 21:21:22,267 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 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 [2020-11-11 21:21:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:22,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:22,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:22,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:22,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952994190] [2020-11-11 21:21:22,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:22,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:22,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:22,515 INFO L87 Difference]: Start difference. First operand 149 states and 393 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:22,771 INFO L93 Difference]: Finished difference Result 187 states and 466 transitions. [2020-11-11 21:21:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:21:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:22,772 INFO L225 Difference]: With dead ends: 187 [2020-11-11 21:21:22,773 INFO L226 Difference]: Without dead ends: 185 [2020-11-11 21:21:22,773 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:21:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-11-11 21:21:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2020-11-11 21:21:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.6442953020134228) internal successors, (394), 149 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 394 transitions. [2020-11-11 21:21:22,778 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 394 transitions. Word has length 13 [2020-11-11 21:21:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:22,778 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 394 transitions. [2020-11-11 21:21:22,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 394 transitions. [2020-11-11 21:21:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:22,779 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:22,779 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:22,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 21:21:22,990 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:22,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2106775881, now seen corresponding path program 38 times [2020-11-11 21:21:22,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:22,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610540899] [2020-11-11 21:21:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:23,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610540899] [2020-11-11 21:21:23,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826418307] [2020-11-11 21:21:23,089 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 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 [2020-11-11 21:21:23,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:21:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:23,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:23,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940538358] [2020-11-11 21:21:23,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:23,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:23,274 INFO L87 Difference]: Start difference. First operand 150 states and 394 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:23,765 INFO L93 Difference]: Finished difference Result 225 states and 543 transitions. [2020-11-11 21:21:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:21:23,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:23,767 INFO L225 Difference]: With dead ends: 225 [2020-11-11 21:21:23,767 INFO L226 Difference]: Without dead ends: 220 [2020-11-11 21:21:23,768 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2020-11-11 21:21:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-11 21:21:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 148. [2020-11-11 21:21:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.578231292517007) internal successors, (379), 147 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 379 transitions. [2020-11-11 21:21:23,774 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 379 transitions. Word has length 13 [2020-11-11 21:21:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:23,774 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 379 transitions. [2020-11-11 21:21:23,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 379 transitions. [2020-11-11 21:21:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:23,775 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:23,775 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:23,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 21:21:23,976 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2078117900, now seen corresponding path program 39 times [2020-11-11 21:21:23,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:23,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143254826] [2020-11-11 21:21:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:24,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143254826] [2020-11-11 21:21:24,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804010331] [2020-11-11 21:21:24,079 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 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 [2020-11-11 21:21:24,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:21:24,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:24,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:24,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:24,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464334497] [2020-11-11 21:21:24,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:24,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:24,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:24,290 INFO L87 Difference]: Start difference. First operand 148 states and 379 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:25,093 INFO L93 Difference]: Finished difference Result 228 states and 540 transitions. [2020-11-11 21:21:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:25,096 INFO L225 Difference]: With dead ends: 228 [2020-11-11 21:21:25,097 INFO L226 Difference]: Without dead ends: 223 [2020-11-11 21:21:25,097 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:21:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-11 21:21:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 147. [2020-11-11 21:21:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.5616438356164384) internal successors, (374), 146 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 374 transitions. [2020-11-11 21:21:25,101 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 374 transitions. Word has length 13 [2020-11-11 21:21:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:25,101 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 374 transitions. [2020-11-11 21:21:25,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 374 transitions. [2020-11-11 21:21:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:25,102 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:25,102 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:25,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:25,313 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2077193418, now seen corresponding path program 40 times [2020-11-11 21:21:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:25,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291837269] [2020-11-11 21:21:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:25,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291837269] [2020-11-11 21:21:25,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375698680] [2020-11-11 21:21:25,407 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 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 [2020-11-11 21:21:25,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:25,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:25,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:25,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:25,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:25,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120495132] [2020-11-11 21:21:25,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:25,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:25,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:25,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:25,626 INFO L87 Difference]: Start difference. First operand 147 states and 374 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:26,376 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-11-11 21:21:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:21:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:26,378 INFO L225 Difference]: With dead ends: 213 [2020-11-11 21:21:26,378 INFO L226 Difference]: Without dead ends: 208 [2020-11-11 21:21:26,379 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 21:21:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-11 21:21:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 143. [2020-11-11 21:21:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.471830985915493) internal successors, (351), 142 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-11-11 21:21:26,383 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-11-11 21:21:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:26,384 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-11-11 21:21:26,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-11-11 21:21:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:26,384 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:26,385 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:26,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-11 21:21:26,588 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:26,588 INFO L82 PathProgramCache]: Analyzing trace with hash 13555915, now seen corresponding path program 6 times [2020-11-11 21:21:26,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:26,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702833490] [2020-11-11 21:21:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:26,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702833490] [2020-11-11 21:21:26,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879101760] [2020-11-11 21:21:26,707 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 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 [2020-11-11 21:21:26,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:21:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:26,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:26,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:26,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:26,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:26,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:26,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7652643] [2020-11-11 21:21:26,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:26,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:26,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:26,948 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:27,398 INFO L93 Difference]: Finished difference Result 196 states and 469 transitions. [2020-11-11 21:21:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:21:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:27,400 INFO L225 Difference]: With dead ends: 196 [2020-11-11 21:21:27,400 INFO L226 Difference]: Without dead ends: 191 [2020-11-11 21:21:27,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:21:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-11 21:21:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 151. [2020-11-11 21:21:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.546666666666667) internal successors, (382), 150 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-11-11 21:21:27,404 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-11-11 21:21:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:27,404 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-11-11 21:21:27,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-11-11 21:21:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:27,405 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:27,405 INFO L494 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:27,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:27,607 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:27,607 INFO L82 PathProgramCache]: Analyzing trace with hash 879672664, now seen corresponding path program 7 times [2020-11-11 21:21:27,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:27,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701283833] [2020-11-11 21:21:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:27,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701283833] [2020-11-11 21:21:27,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018735581] [2020-11-11 21:21:27,743 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 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 [2020-11-11 21:21:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:21:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:27,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:21:27,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-11-11 21:21:27,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171107107] [2020-11-11 21:21:27,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:21:27,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:27,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:21:27,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:21:27,945 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:27,982 INFO L93 Difference]: Finished difference Result 233 states and 611 transitions. [2020-11-11 21:21:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:21:27,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:27,985 INFO L225 Difference]: With dead ends: 233 [2020-11-11 21:21:27,985 INFO L226 Difference]: Without dead ends: 213 [2020-11-11 21:21:27,985 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:21:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-11 21:21:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-11-11 21:21:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6556603773584904) internal successors, (563), 212 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 563 transitions. [2020-11-11 21:21:27,990 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 563 transitions. Word has length 14 [2020-11-11 21:21:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:27,991 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 563 transitions. [2020-11-11 21:21:27,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 563 transitions. [2020-11-11 21:21:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:27,992 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:27,992 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:28,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:28,204 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash 879373793, now seen corresponding path program 41 times [2020-11-11 21:21:28,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:28,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342468423] [2020-11-11 21:21:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:28,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342468423] [2020-11-11 21:21:28,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728847414] [2020-11-11 21:21:28,318 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 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 [2020-11-11 21:21:28,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:28,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:28,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:28,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:28,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700100026] [2020-11-11 21:21:28,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:28,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:28,600 INFO L87 Difference]: Start difference. First operand 213 states and 563 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:29,561 INFO L93 Difference]: Finished difference Result 291 states and 730 transitions. [2020-11-11 21:21:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:29,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:29,564 INFO L225 Difference]: With dead ends: 291 [2020-11-11 21:21:29,564 INFO L226 Difference]: Without dead ends: 286 [2020-11-11 21:21:29,564 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 21:21:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-11 21:21:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 215. [2020-11-11 21:21:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.663551401869159) internal successors, (570), 214 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 570 transitions. [2020-11-11 21:21:29,570 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 570 transitions. Word has length 14 [2020-11-11 21:21:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:29,570 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 570 transitions. [2020-11-11 21:21:29,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 570 transitions. [2020-11-11 21:21:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:29,571 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:29,572 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:29,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 21:21:29,785 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash 855363053, now seen corresponding path program 42 times [2020-11-11 21:21:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:29,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684807017] [2020-11-11 21:21:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:29,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684807017] [2020-11-11 21:21:29,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190883127] [2020-11-11 21:21:29,907 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 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 [2020-11-11 21:21:29,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:29,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:29,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:30,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:30,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:30,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414365170] [2020-11-11 21:21:30,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:30,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:30,191 INFO L87 Difference]: Start difference. First operand 215 states and 570 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:30,576 INFO L93 Difference]: Finished difference Result 284 states and 701 transitions. [2020-11-11 21:21:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:30,580 INFO L225 Difference]: With dead ends: 284 [2020-11-11 21:21:30,580 INFO L226 Difference]: Without dead ends: 282 [2020-11-11 21:21:30,580 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-11-11 21:21:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 217. [2020-11-11 21:21:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.6574074074074074) internal successors, (574), 216 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 574 transitions. [2020-11-11 21:21:30,587 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 574 transitions. Word has length 14 [2020-11-11 21:21:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:30,587 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 574 transitions. [2020-11-11 21:21:30,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 574 transitions. [2020-11-11 21:21:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:30,588 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:30,588 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:30,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:30,803 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash 870406702, now seen corresponding path program 43 times [2020-11-11 21:21:30,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:30,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648532643] [2020-11-11 21:21:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:30,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648532643] [2020-11-11 21:21:30,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420381767] [2020-11-11 21:21:30,923 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 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 [2020-11-11 21:21:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:30,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:31,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:31,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:31,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:31,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391221882] [2020-11-11 21:21:31,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:31,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:31,202 INFO L87 Difference]: Start difference. First operand 217 states and 574 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:32,255 INFO L93 Difference]: Finished difference Result 303 states and 764 transitions. [2020-11-11 21:21:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:32,259 INFO L225 Difference]: With dead ends: 303 [2020-11-11 21:21:32,259 INFO L226 Difference]: Without dead ends: 298 [2020-11-11 21:21:32,259 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-11 21:21:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 218. [2020-11-11 21:21:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.6682027649769586) internal successors, (579), 217 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 579 transitions. [2020-11-11 21:21:32,265 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 579 transitions. Word has length 14 [2020-11-11 21:21:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:32,266 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 579 transitions. [2020-11-11 21:21:32,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 579 transitions. [2020-11-11 21:21:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:32,267 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:32,267 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:32,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-11 21:21:32,481 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash 870407663, now seen corresponding path program 44 times [2020-11-11 21:21:32,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:32,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142030370] [2020-11-11 21:21:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:32,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142030370] [2020-11-11 21:21:32,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722661140] [2020-11-11 21:21:32,615 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 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 [2020-11-11 21:21:32,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:32,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:32,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:32,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:32,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:32,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796526884] [2020-11-11 21:21:32,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:32,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:32,979 INFO L87 Difference]: Start difference. First operand 218 states and 579 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:34,175 INFO L93 Difference]: Finished difference Result 315 states and 786 transitions. [2020-11-11 21:21:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:34,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:34,177 INFO L225 Difference]: With dead ends: 315 [2020-11-11 21:21:34,177 INFO L226 Difference]: Without dead ends: 310 [2020-11-11 21:21:34,177 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=481, Invalid=1159, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-11 21:21:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 219. [2020-11-11 21:21:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.665137614678899) internal successors, (581), 218 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 581 transitions. [2020-11-11 21:21:34,183 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 581 transitions. Word has length 14 [2020-11-11 21:21:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:34,183 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 581 transitions. [2020-11-11 21:21:34,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 581 transitions. [2020-11-11 21:21:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:34,184 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:34,184 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:34,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 21:21:34,396 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 126049582, now seen corresponding path program 45 times [2020-11-11 21:21:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:34,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291224915] [2020-11-11 21:21:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:34,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291224915] [2020-11-11 21:21:34,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484254637] [2020-11-11 21:21:34,527 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 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 [2020-11-11 21:21:34,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:21:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:34,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:34,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:34,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577703179] [2020-11-11 21:21:34,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:34,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:34,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:34,864 INFO L87 Difference]: Start difference. First operand 219 states and 581 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:35,262 INFO L93 Difference]: Finished difference Result 297 states and 733 transitions. [2020-11-11 21:21:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:35,265 INFO L225 Difference]: With dead ends: 297 [2020-11-11 21:21:35,265 INFO L226 Difference]: Without dead ends: 295 [2020-11-11 21:21:35,266 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-11-11 21:21:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 222. [2020-11-11 21:21:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.669683257918552) internal successors, (590), 221 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 590 transitions. [2020-11-11 21:21:35,271 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 590 transitions. Word has length 14 [2020-11-11 21:21:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:35,271 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 590 transitions. [2020-11-11 21:21:35,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 590 transitions. [2020-11-11 21:21:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:35,272 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:35,272 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:35,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 21:21:35,485 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:35,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:35,485 INFO L82 PathProgramCache]: Analyzing trace with hash 126050543, now seen corresponding path program 46 times [2020-11-11 21:21:35,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:35,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10646036] [2020-11-11 21:21:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:35,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10646036] [2020-11-11 21:21:35,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162538515] [2020-11-11 21:21:35,607 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 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 [2020-11-11 21:21:35,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:35,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:35,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:35,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:35,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687141437] [2020-11-11 21:21:35,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:35,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:35,912 INFO L87 Difference]: Start difference. First operand 222 states and 590 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:36,333 INFO L93 Difference]: Finished difference Result 296 states and 730 transitions. [2020-11-11 21:21:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:36,337 INFO L225 Difference]: With dead ends: 296 [2020-11-11 21:21:36,337 INFO L226 Difference]: Without dead ends: 294 [2020-11-11 21:21:36,337 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-11-11 21:21:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 223. [2020-11-11 21:21:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.6621621621621623) internal successors, (591), 222 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 591 transitions. [2020-11-11 21:21:36,343 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 591 transitions. Word has length 14 [2020-11-11 21:21:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:36,343 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 591 transitions. [2020-11-11 21:21:36,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 591 transitions. [2020-11-11 21:21:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:36,344 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:36,344 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:36,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 21:21:36,556 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:36,556 INFO L82 PathProgramCache]: Analyzing trace with hash 592426881, now seen corresponding path program 47 times [2020-11-11 21:21:36,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:36,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444761181] [2020-11-11 21:21:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:36,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444761181] [2020-11-11 21:21:36,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091499889] [2020-11-11 21:21:36,678 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 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 [2020-11-11 21:21:36,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:36,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:36,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:36,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:36,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026820966] [2020-11-11 21:21:36,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:36,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:36,956 INFO L87 Difference]: Start difference. First operand 223 states and 591 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:38,213 INFO L93 Difference]: Finished difference Result 324 states and 819 transitions. [2020-11-11 21:21:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:38,217 INFO L225 Difference]: With dead ends: 324 [2020-11-11 21:21:38,217 INFO L226 Difference]: Without dead ends: 316 [2020-11-11 21:21:38,217 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:21:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-11 21:21:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 228. [2020-11-11 21:21:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.7136563876651985) internal successors, (616), 227 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 616 transitions. [2020-11-11 21:21:38,223 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 616 transitions. Word has length 14 [2020-11-11 21:21:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:38,223 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 616 transitions. [2020-11-11 21:21:38,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 616 transitions. [2020-11-11 21:21:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:38,224 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:38,224 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:38,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:38,439 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 592427842, now seen corresponding path program 48 times [2020-11-11 21:21:38,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:38,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443640650] [2020-11-11 21:21:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:38,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443640650] [2020-11-11 21:21:38,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22020113] [2020-11-11 21:21:38,564 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 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 [2020-11-11 21:21:38,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:38,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:38,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:38,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:43,046 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-11 21:21:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:43,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:43,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:21:43,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937645128] [2020-11-11 21:21:43,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:21:43,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:43,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:21:43,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:21:43,050 INFO L87 Difference]: Start difference. First operand 228 states and 616 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:21:47,898 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-11-11 21:21:54,881 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-11-11 21:22:01,384 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-11 21:22:17,277 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-11-11 21:22:18,889 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-11-11 21:22:28,557 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-11-11 21:22:57,526 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 21:23:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:38,154 INFO L93 Difference]: Finished difference Result 390 states and 966 transitions. [2020-11-11 21:23:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 21:23:38,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 14 [2020-11-11 21:23:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:38,158 INFO L225 Difference]: With dead ends: 390 [2020-11-11 21:23:38,159 INFO L226 Difference]: Without dead ends: 385 [2020-11-11 21:23:38,159 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=695, Invalid=1837, Unknown=18, NotChecked=0, Total=2550 [2020-11-11 21:23:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-11-11 21:23:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 228. [2020-11-11 21:23:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.7048458149779737) internal successors, (614), 227 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 614 transitions. [2020-11-11 21:23:38,166 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 614 transitions. Word has length 14 [2020-11-11 21:23:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:38,167 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 614 transitions. [2020-11-11 21:23:38,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:23:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 614 transitions. [2020-11-11 21:23:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:38,168 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:38,168 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:38,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:38,382 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash 592456672, now seen corresponding path program 49 times [2020-11-11 21:23:38,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:38,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615315367] [2020-11-11 21:23:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:38,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615315367] [2020-11-11 21:23:38,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154041792] [2020-11-11 21:23:38,529 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 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 [2020-11-11 21:23:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:38,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:38,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:38,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:23:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:38,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:38,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103562069] [2020-11-11 21:23:38,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:38,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:38,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:38,919 INFO L87 Difference]: Start difference. First operand 228 states and 614 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:40,347 INFO L93 Difference]: Finished difference Result 349 states and 880 transitions. [2020-11-11 21:23:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:23:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:23:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:40,351 INFO L225 Difference]: With dead ends: 349 [2020-11-11 21:23:40,351 INFO L226 Difference]: Without dead ends: 344 [2020-11-11 21:23:40,352 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:23:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-11-11 21:23:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 229. [2020-11-11 21:23:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.7149122807017543) internal successors, (619), 228 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 619 transitions. [2020-11-11 21:23:40,358 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 619 transitions. Word has length 14 [2020-11-11 21:23:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:40,358 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 619 transitions. [2020-11-11 21:23:40,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 619 transitions. [2020-11-11 21:23:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:40,359 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:40,359 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:40,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:40,568 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash 592457633, now seen corresponding path program 50 times [2020-11-11 21:23:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:40,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977158747] [2020-11-11 21:23:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977158747] [2020-11-11 21:23:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661129976] [2020-11-11 21:23:40,712 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 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 [2020-11-11 21:23:40,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:23:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:23:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:41,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:41,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:41,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:43,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:43,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:23:43,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100097354] [2020-11-11 21:23:43,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:23:43,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:23:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:23:43,134 INFO L87 Difference]: Start difference. First operand 229 states and 619 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:23:47,515 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-11 21:23:47,820 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 24 [2020-11-11 21:23:49,934 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-11 21:24:00,174 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-11-11 21:24:09,919 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-11 21:24:26,217 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-11 21:24:42,790 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-11-11 21:24:57,342 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-11-11 21:25:13,664 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 45 [2020-11-11 21:26:00,660 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-11 21:26:19,115 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-11-11 21:27:22,252 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-11 21:27:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:54,683 INFO L93 Difference]: Finished difference Result 414 states and 1004 transitions. [2020-11-11 21:27:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 21:27:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 14 [2020-11-11 21:27:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:54,714 INFO L225 Difference]: With dead ends: 414 [2020-11-11 21:27:54,714 INFO L226 Difference]: Without dead ends: 405 [2020-11-11 21:27:54,715 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 130.1s TimeCoverageRelationStatistics Valid=778, Invalid=2255, Unknown=47, NotChecked=0, Total=3080 [2020-11-11 21:27:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-11-11 21:27:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 228. [2020-11-11 21:27:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.700440528634361) internal successors, (613), 227 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 613 transitions. [2020-11-11 21:27:54,721 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 613 transitions. Word has length 14 [2020-11-11 21:27:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:54,721 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 613 transitions. [2020-11-11 21:27:54,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:27:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 613 transitions. [2020-11-11 21:27:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:54,722 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:54,722 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:54,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-11 21:27:54,936 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1007830578, now seen corresponding path program 51 times [2020-11-11 21:27:54,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:54,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230702584] [2020-11-11 21:27:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:55,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230702584] [2020-11-11 21:27:55,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402468073] [2020-11-11 21:27:55,119 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 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 [2020-11-11 21:27:55,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 21:27:55,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:55,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:55,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:55,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:27:55,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682714899] [2020-11-11 21:27:55,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:27:55,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:55,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:27:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:27:55,642 INFO L87 Difference]: Start difference. First operand 228 states and 613 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:56,392 INFO L93 Difference]: Finished difference Result 323 states and 800 transitions. [2020-11-11 21:27:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:27:56,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:27:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:56,396 INFO L225 Difference]: With dead ends: 323 [2020-11-11 21:27:56,396 INFO L226 Difference]: Without dead ends: 321 [2020-11-11 21:27:56,396 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:27:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-11 21:27:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 233. [2020-11-11 21:27:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.6982758620689653) internal successors, (626), 232 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 626 transitions. [2020-11-11 21:27:56,401 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 626 transitions. Word has length 14 [2020-11-11 21:27:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:56,401 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 626 transitions. [2020-11-11 21:27:56,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 626 transitions. [2020-11-11 21:27:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:56,402 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:56,402 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:56,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:27:56,603 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1007801748, now seen corresponding path program 52 times [2020-11-11 21:27:56,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:56,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319024614] [2020-11-11 21:27:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:56,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319024614] [2020-11-11 21:27:56,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946060138] [2020-11-11 21:27:56,801 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 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 [2020-11-11 21:27:56,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:27:56,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:56,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:57,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:57,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:27:57,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287098352] [2020-11-11 21:27:57,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:27:57,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:27:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:27:57,327 INFO L87 Difference]: Start difference. First operand 233 states and 626 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:58,017 INFO L93 Difference]: Finished difference Result 315 states and 780 transitions. [2020-11-11 21:27:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:27:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:27:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:58,022 INFO L225 Difference]: With dead ends: 315 [2020-11-11 21:27:58,022 INFO L226 Difference]: Without dead ends: 313 [2020-11-11 21:27:58,022 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:27:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-11-11 21:27:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 232. [2020-11-11 21:27:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.696969696969697) internal successors, (623), 231 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 623 transitions. [2020-11-11 21:27:58,027 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 623 transitions. Word has length 14 [2020-11-11 21:27:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:58,027 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 623 transitions. [2020-11-11 21:27:58,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 623 transitions. [2020-11-11 21:27:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:58,028 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:58,028 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:58,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-11 21:27:58,229 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash 564987983, now seen corresponding path program 53 times [2020-11-11 21:27:58,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:58,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281085259] [2020-11-11 21:27:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:58,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281085259] [2020-11-11 21:27:58,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177167737] [2020-11-11 21:27:58,455 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 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 [2020-11-11 21:27:58,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:27:58,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:58,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:58,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:58,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:28:03,140 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-11 21:28:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:28:03,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:28:03,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:28:03,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116347941] [2020-11-11 21:28:03,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:28:03,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:28:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:28:03,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=241, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:28:03,144 INFO L87 Difference]: Start difference. First operand 232 states and 623 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:28:12,843 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-11-11 21:28:17,183 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-11-11 21:28:42,224 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-11 21:29:04,842 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-11-11 21:29:17,161 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 40 [2020-11-11 21:30:06,662 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 21:30:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:41,187 INFO L93 Difference]: Finished difference Result 416 states and 1031 transitions. [2020-11-11 21:30:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 21:30:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 14 [2020-11-11 21:30:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:41,195 INFO L225 Difference]: With dead ends: 416 [2020-11-11 21:30:41,195 INFO L226 Difference]: Without dead ends: 406 [2020-11-11 21:30:41,195 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 75.5s TimeCoverageRelationStatistics Valid=670, Invalid=1855, Unknown=25, NotChecked=0, Total=2550 [2020-11-11 21:30:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-11-11 21:30:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 239. [2020-11-11 21:30:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.73109243697479) internal successors, (650), 238 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 650 transitions. [2020-11-11 21:30:41,200 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 650 transitions. Word has length 14 [2020-11-11 21:30:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:41,201 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 650 transitions. [2020-11-11 21:30:41,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:30:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 650 transitions. [2020-11-11 21:30:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:41,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:41,202 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:41,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:41,404 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash 565016813, now seen corresponding path program 54 times [2020-11-11 21:30:41,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:41,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660571578] [2020-11-11 21:30:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:41,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660571578] [2020-11-11 21:30:41,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052349208] [2020-11-11 21:30:41,630 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 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 [2020-11-11 21:30:41,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:30:41,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:41,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:42,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:42,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:42,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:42,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:42,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:42,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140256999] [2020-11-11 21:30:42,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:42,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:42,275 INFO L87 Difference]: Start difference. First operand 239 states and 650 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:44,871 INFO L93 Difference]: Finished difference Result 397 states and 1002 transitions. [2020-11-11 21:30:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:30:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:30:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:44,877 INFO L225 Difference]: With dead ends: 397 [2020-11-11 21:30:44,877 INFO L226 Difference]: Without dead ends: 389 [2020-11-11 21:30:44,877 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:30:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-11-11 21:30:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 241. [2020-11-11 21:30:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.75) internal successors, (660), 240 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 660 transitions. [2020-11-11 21:30:44,885 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 660 transitions. Word has length 14 [2020-11-11 21:30:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:44,885 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 660 transitions. [2020-11-11 21:30:44,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 660 transitions. [2020-11-11 21:30:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:44,886 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:44,887 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:45,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-11 21:30:45,101 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash 565017774, now seen corresponding path program 55 times [2020-11-11 21:30:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:45,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500792530] [2020-11-11 21:30:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500792530] [2020-11-11 21:30:45,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011879494] [2020-11-11 21:30:45,321 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 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 [2020-11-11 21:30:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:45,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:45,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:45,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:45,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:45,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:45,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:45,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474260263] [2020-11-11 21:30:45,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:45,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:45,984 INFO L87 Difference]: Start difference. First operand 241 states and 660 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:49,034 INFO L93 Difference]: Finished difference Result 413 states and 1046 transitions. [2020-11-11 21:30:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 21:30:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:30:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:49,039 INFO L225 Difference]: With dead ends: 413 [2020-11-11 21:30:49,039 INFO L226 Difference]: Without dead ends: 405 [2020-11-11 21:30:49,040 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=559, Invalid=1603, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 21:30:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-11-11 21:30:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 240. [2020-11-11 21:30:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.7531380753138075) internal successors, (658), 239 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 658 transitions. [2020-11-11 21:30:49,045 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 658 transitions. Word has length 14 [2020-11-11 21:30:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:49,045 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 658 transitions. [2020-11-11 21:30:49,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 658 transitions. [2020-11-11 21:30:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:49,046 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:49,046 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:49,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:49,247 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash 565910543, now seen corresponding path program 56 times [2020-11-11 21:30:49,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:49,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143663430] [2020-11-11 21:30:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:49,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143663430] [2020-11-11 21:30:49,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645398345] [2020-11-11 21:30:49,468 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 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 [2020-11-11 21:30:49,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:30:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:49,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:49,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:50,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:50,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:50,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220138299] [2020-11-11 21:30:50,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:50,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:50,061 INFO L87 Difference]: Start difference. First operand 240 states and 658 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:52,714 INFO L93 Difference]: Finished difference Result 364 states and 938 transitions. [2020-11-11 21:30:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:30:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:30:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:52,718 INFO L225 Difference]: With dead ends: 364 [2020-11-11 21:30:52,718 INFO L226 Difference]: Without dead ends: 359 [2020-11-11 21:30:52,719 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:30:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-11-11 21:30:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 241. [2020-11-11 21:30:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7625) internal successors, (663), 240 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 663 transitions. [2020-11-11 21:30:52,724 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 663 transitions. Word has length 14 [2020-11-11 21:30:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:52,724 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 663 transitions. [2020-11-11 21:30:52,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 663 transitions. [2020-11-11 21:30:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:52,724 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:52,725 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:52,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-11 21:30:52,925 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 565911504, now seen corresponding path program 57 times [2020-11-11 21:30:52,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:52,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434955054] [2020-11-11 21:30:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:53,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434955054] [2020-11-11 21:30:53,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599284757] [2020-11-11 21:30:53,148 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 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 [2020-11-11 21:30:53,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:30:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:53,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:53,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:53,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:53,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881103532] [2020-11-11 21:30:53,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:53,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:53,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:53,858 INFO L87 Difference]: Start difference. First operand 241 states and 663 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:56,879 INFO L93 Difference]: Finished difference Result 379 states and 970 transitions. [2020-11-11 21:30:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:30:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:30:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:56,885 INFO L225 Difference]: With dead ends: 379 [2020-11-11 21:30:56,885 INFO L226 Difference]: Without dead ends: 374 [2020-11-11 21:30:56,885 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 21:30:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-11-11 21:30:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 238. [2020-11-11 21:30:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.7510548523206753) internal successors, (652), 237 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 652 transitions. [2020-11-11 21:30:56,890 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 652 transitions. Word has length 14 [2020-11-11 21:30:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:56,891 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 652 transitions. [2020-11-11 21:30:56,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 652 transitions. [2020-11-11 21:30:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:56,891 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:56,891 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:57,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-11-11 21:30:57,092 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 565940334, now seen corresponding path program 58 times [2020-11-11 21:30:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:57,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637597886] [2020-11-11 21:30:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637597886] [2020-11-11 21:30:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010693717] [2020-11-11 21:30:57,316 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 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 [2020-11-11 21:30:57,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:30:57,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:57,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:57,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:57,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:57,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:57,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878239376] [2020-11-11 21:30:57,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:57,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:57,856 INFO L87 Difference]: Start difference. First operand 238 states and 652 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:00,187 INFO L93 Difference]: Finished difference Result 367 states and 943 transitions. [2020-11-11 21:31:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:31:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:00,193 INFO L225 Difference]: With dead ends: 367 [2020-11-11 21:31:00,193 INFO L226 Difference]: Without dead ends: 362 [2020-11-11 21:31:00,193 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-11-11 21:31:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 236. [2020-11-11 21:31:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.7319148936170214) internal successors, (642), 235 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 642 transitions. [2020-11-11 21:31:00,200 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 642 transitions. Word has length 14 [2020-11-11 21:31:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:00,200 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 642 transitions. [2020-11-11 21:31:00,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 642 transitions. [2020-11-11 21:31:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:00,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:00,201 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:00,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:00,416 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:00,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1798378131, now seen corresponding path program 59 times [2020-11-11 21:31:00,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:00,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800667335] [2020-11-11 21:31:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:00,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800667335] [2020-11-11 21:31:00,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331202902] [2020-11-11 21:31:00,618 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 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 [2020-11-11 21:31:00,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:31:00,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:01,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:01,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713557944] [2020-11-11 21:31:01,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:01,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:01,113 INFO L87 Difference]: Start difference. First operand 236 states and 642 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:01,889 INFO L93 Difference]: Finished difference Result 334 states and 840 transitions. [2020-11-11 21:31:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:31:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:01,894 INFO L225 Difference]: With dead ends: 334 [2020-11-11 21:31:01,894 INFO L226 Difference]: Without dead ends: 332 [2020-11-11 21:31:01,894 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:31:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-11-11 21:31:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 248. [2020-11-11 21:31:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.7449392712550607) internal successors, (678), 247 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 678 transitions. [2020-11-11 21:31:01,900 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 678 transitions. Word has length 14 [2020-11-11 21:31:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:01,900 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 678 transitions. [2020-11-11 21:31:01,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 678 transitions. [2020-11-11 21:31:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:01,901 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:01,901 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:02,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:02,110 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:02,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1797483440, now seen corresponding path program 60 times [2020-11-11 21:31:02,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:02,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327467606] [2020-11-11 21:31:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327467606] [2020-11-11 21:31:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589382976] [2020-11-11 21:31:02,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:31:02,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:31:02,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:02,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:02,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:02,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:02,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:02,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185109754] [2020-11-11 21:31:02,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:02,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:02,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:02,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:02,787 INFO L87 Difference]: Start difference. First operand 248 states and 678 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:03,466 INFO L93 Difference]: Finished difference Result 346 states and 864 transitions. [2020-11-11 21:31:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:31:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:03,471 INFO L225 Difference]: With dead ends: 346 [2020-11-11 21:31:03,471 INFO L226 Difference]: Without dead ends: 344 [2020-11-11 21:31:03,472 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:31:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-11-11 21:31:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 251. [2020-11-11 21:31:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.74) internal successors, (685), 250 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 685 transitions. [2020-11-11 21:31:03,479 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 685 transitions. Word has length 14 [2020-11-11 21:31:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:03,479 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 685 transitions. [2020-11-11 21:31:03,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 685 transitions. [2020-11-11 21:31:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:03,480 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:03,480 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:03,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-11 21:31:03,694 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash -285648607, now seen corresponding path program 61 times [2020-11-11 21:31:03,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:03,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236377479] [2020-11-11 21:31:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:03,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236377479] [2020-11-11 21:31:03,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848507353] [2020-11-11 21:31:03,895 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 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 [2020-11-11 21:31:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:04,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:04,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:04,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:04,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400073006] [2020-11-11 21:31:04,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:04,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:04,267 INFO L87 Difference]: Start difference. First operand 251 states and 685 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:05,776 INFO L93 Difference]: Finished difference Result 301 states and 775 transitions. [2020-11-11 21:31:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:31:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:05,781 INFO L225 Difference]: With dead ends: 301 [2020-11-11 21:31:05,781 INFO L226 Difference]: Without dead ends: 296 [2020-11-11 21:31:05,782 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=422, Invalid=1218, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-11-11 21:31:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 250. [2020-11-11 21:31:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.714859437751004) internal successors, (676), 249 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 676 transitions. [2020-11-11 21:31:05,786 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 676 transitions. Word has length 14 [2020-11-11 21:31:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:05,786 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 676 transitions. [2020-11-11 21:31:05,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 676 transitions. [2020-11-11 21:31:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:05,787 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:05,787 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:05,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:05,988 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash -284725086, now seen corresponding path program 62 times [2020-11-11 21:31:05,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:05,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039168306] [2020-11-11 21:31:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:06,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039168306] [2020-11-11 21:31:06,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613489073] [2020-11-11 21:31:06,222 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 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 [2020-11-11 21:31:06,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:06,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:06,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:06,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:06,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:06,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:06,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:06,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405302165] [2020-11-11 21:31:06,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:06,759 INFO L87 Difference]: Start difference. First operand 250 states and 676 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:09,976 INFO L93 Difference]: Finished difference Result 413 states and 1040 transitions. [2020-11-11 21:31:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:31:09,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:09,982 INFO L225 Difference]: With dead ends: 413 [2020-11-11 21:31:09,982 INFO L226 Difference]: Without dead ends: 405 [2020-11-11 21:31:09,982 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=674, Invalid=1978, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 21:31:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-11-11 21:31:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 253. [2020-11-11 21:31:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.742063492063492) internal successors, (691), 252 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 691 transitions. [2020-11-11 21:31:09,987 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 691 transitions. Word has length 14 [2020-11-11 21:31:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:09,988 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 691 transitions. [2020-11-11 21:31:09,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 691 transitions. [2020-11-11 21:31:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:09,988 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:09,988 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:10,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-11 21:31:10,189 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash -284724125, now seen corresponding path program 63 times [2020-11-11 21:31:10,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:10,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186206451] [2020-11-11 21:31:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:10,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186206451] [2020-11-11 21:31:10,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331640956] [2020-11-11 21:31:10,471 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 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 [2020-11-11 21:31:10,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:31:10,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:10,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:10,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:10,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:11,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:11,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:11,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431520626] [2020-11-11 21:31:11,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:11,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:11,107 INFO L87 Difference]: Start difference. First operand 253 states and 691 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:13,902 INFO L93 Difference]: Finished difference Result 450 states and 1157 transitions. [2020-11-11 21:31:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:31:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:13,907 INFO L225 Difference]: With dead ends: 450 [2020-11-11 21:31:13,907 INFO L226 Difference]: Without dead ends: 442 [2020-11-11 21:31:13,908 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=510, Invalid=1470, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:31:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-11-11 21:31:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 256. [2020-11-11 21:31:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.768627450980392) internal successors, (706), 255 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 706 transitions. [2020-11-11 21:31:13,913 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 706 transitions. Word has length 14 [2020-11-11 21:31:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:13,913 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 706 transitions. [2020-11-11 21:31:13,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 706 transitions. [2020-11-11 21:31:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:13,914 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:13,914 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:14,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:14,115 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:14,116 INFO L82 PathProgramCache]: Analyzing trace with hash -284695295, now seen corresponding path program 64 times [2020-11-11 21:31:14,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:14,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198503042] [2020-11-11 21:31:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:14,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198503042] [2020-11-11 21:31:14,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345931857] [2020-11-11 21:31:14,363 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 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 [2020-11-11 21:31:14,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:14,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:14,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:14,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:14,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:14,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112465498] [2020-11-11 21:31:14,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:14,926 INFO L87 Difference]: Start difference. First operand 256 states and 706 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:18,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:18,443 INFO L93 Difference]: Finished difference Result 437 states and 1119 transitions. [2020-11-11 21:31:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:18,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:18,449 INFO L225 Difference]: With dead ends: 437 [2020-11-11 21:31:18,449 INFO L226 Difference]: Without dead ends: 429 [2020-11-11 21:31:18,450 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 21:31:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-11 21:31:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 257. [2020-11-11 21:31:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.77734375) internal successors, (711), 256 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 711 transitions. [2020-11-11 21:31:18,457 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 711 transitions. Word has length 14 [2020-11-11 21:31:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:18,458 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 711 transitions. [2020-11-11 21:31:18,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 711 transitions. [2020-11-11 21:31:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:18,459 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:18,459 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:18,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 21:31:18,673 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash -257019456, now seen corresponding path program 65 times [2020-11-11 21:31:18,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:18,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927950326] [2020-11-11 21:31:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:18,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927950326] [2020-11-11 21:31:18,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845323772] [2020-11-11 21:31:18,898 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 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 [2020-11-11 21:31:18,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:18,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:18,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:18,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:19,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:19,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:19,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:19,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578113659] [2020-11-11 21:31:19,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:19,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:19,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:19,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:19,377 INFO L87 Difference]: Start difference. First operand 257 states and 711 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:21,932 INFO L93 Difference]: Finished difference Result 423 states and 1085 transitions. [2020-11-11 21:31:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 21:31:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:21,938 INFO L225 Difference]: With dead ends: 423 [2020-11-11 21:31:21,938 INFO L226 Difference]: Without dead ends: 415 [2020-11-11 21:31:21,939 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 21:31:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-11-11 21:31:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2020-11-11 21:31:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.8282442748091605) internal successors, (741), 262 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 741 transitions. [2020-11-11 21:31:21,947 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 741 transitions. Word has length 14 [2020-11-11 21:31:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:21,947 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 741 transitions. [2020-11-11 21:31:21,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 741 transitions. [2020-11-11 21:31:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:21,948 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:21,948 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:22,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:22,150 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash -257018495, now seen corresponding path program 66 times [2020-11-11 21:31:22,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:22,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998435726] [2020-11-11 21:31:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:22,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998435726] [2020-11-11 21:31:22,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612654207] [2020-11-11 21:31:22,396 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 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 [2020-11-11 21:31:22,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:31:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:22,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:22,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:22,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:22,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845091584] [2020-11-11 21:31:22,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:22,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:22,938 INFO L87 Difference]: Start difference. First operand 263 states and 741 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:25,715 INFO L93 Difference]: Finished difference Result 449 states and 1164 transitions. [2020-11-11 21:31:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:25,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:25,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:25,720 INFO L225 Difference]: With dead ends: 449 [2020-11-11 21:31:25,720 INFO L226 Difference]: Without dead ends: 441 [2020-11-11 21:31:25,721 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=562, Invalid=1694, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:31:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-11-11 21:31:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 264. [2020-11-11 21:31:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.821292775665399) internal successors, (742), 263 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 742 transitions. [2020-11-11 21:31:25,728 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 742 transitions. Word has length 14 [2020-11-11 21:31:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:25,728 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 742 transitions. [2020-11-11 21:31:25,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 742 transitions. [2020-11-11 21:31:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:25,729 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:25,730 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:25,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-11 21:31:25,943 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:25,943 INFO L82 PathProgramCache]: Analyzing trace with hash -256989665, now seen corresponding path program 67 times [2020-11-11 21:31:25,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:25,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841556706] [2020-11-11 21:31:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:26,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841556706] [2020-11-11 21:31:26,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53442149] [2020-11-11 21:31:26,221 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 [2020-11-11 21:31:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:26,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:26,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:26,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:26,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122471753] [2020-11-11 21:31:26,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:26,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:26,657 INFO L87 Difference]: Start difference. First operand 264 states and 742 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:28,738 INFO L93 Difference]: Finished difference Result 445 states and 1150 transitions. [2020-11-11 21:31:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:31:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:28,742 INFO L225 Difference]: With dead ends: 445 [2020-11-11 21:31:28,742 INFO L226 Difference]: Without dead ends: 437 [2020-11-11 21:31:28,743 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:31:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-11-11 21:31:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 263. [2020-11-11 21:31:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.812977099236641) internal successors, (737), 262 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 737 transitions. [2020-11-11 21:31:28,750 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 737 transitions. Word has length 14 [2020-11-11 21:31:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:28,751 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 737 transitions. [2020-11-11 21:31:28,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 737 transitions. [2020-11-11 21:31:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:28,752 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:28,752 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:28,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:28,952 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash -256988704, now seen corresponding path program 68 times [2020-11-11 21:31:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:28,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964453390] [2020-11-11 21:31:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:29,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964453390] [2020-11-11 21:31:29,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730749978] [2020-11-11 21:31:29,196 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 [2020-11-11 21:31:29,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:29,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:29,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:29,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:29,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054268373] [2020-11-11 21:31:29,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:29,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:29,661 INFO L87 Difference]: Start difference. First operand 263 states and 737 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:32,341 INFO L93 Difference]: Finished difference Result 448 states and 1151 transitions. [2020-11-11 21:31:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:31:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:32,345 INFO L225 Difference]: With dead ends: 448 [2020-11-11 21:31:32,345 INFO L226 Difference]: Without dead ends: 440 [2020-11-11 21:31:32,345 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 21:31:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-11-11 21:31:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 252. [2020-11-11 21:31:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.7928286852589643) internal successors, (701), 251 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 701 transitions. [2020-11-11 21:31:32,352 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 701 transitions. Word has length 14 [2020-11-11 21:31:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:32,352 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 701 transitions. [2020-11-11 21:31:32,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 701 transitions. [2020-11-11 21:31:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:32,353 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:32,353 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:32,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:32,556 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash -256095935, now seen corresponding path program 69 times [2020-11-11 21:31:32,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:32,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838773191] [2020-11-11 21:31:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838773191] [2020-11-11 21:31:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205744325] [2020-11-11 21:31:32,844 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 [2020-11-11 21:31:32,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:31:32,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:32,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:32,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:33,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:33,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:33,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:33,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88152267] [2020-11-11 21:31:33,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:33,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:33,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:33,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:33,325 INFO L87 Difference]: Start difference. First operand 252 states and 701 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:36,272 INFO L93 Difference]: Finished difference Result 403 states and 1041 transitions. [2020-11-11 21:31:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:36,276 INFO L225 Difference]: With dead ends: 403 [2020-11-11 21:31:36,277 INFO L226 Difference]: Without dead ends: 395 [2020-11-11 21:31:36,277 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=610, Invalid=1840, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 21:31:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-11-11 21:31:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 250. [2020-11-11 21:31:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.7751004016064256) internal successors, (691), 249 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 691 transitions. [2020-11-11 21:31:36,283 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 691 transitions. Word has length 14 [2020-11-11 21:31:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:36,284 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 691 transitions. [2020-11-11 21:31:36,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 691 transitions. [2020-11-11 21:31:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:36,285 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:36,285 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:36,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:36,499 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash -536472019, now seen corresponding path program 70 times [2020-11-11 21:31:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:36,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885789864] [2020-11-11 21:31:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:36,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885789864] [2020-11-11 21:31:36,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542276288] [2020-11-11 21:31:36,829 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 [2020-11-11 21:31:36,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:37,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:37,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:37,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342377654] [2020-11-11 21:31:37,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:37,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:37,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:37,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:37,498 INFO L87 Difference]: Start difference. First operand 250 states and 691 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:38,033 INFO L93 Difference]: Finished difference Result 308 states and 811 transitions. [2020-11-11 21:31:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:31:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:38,037 INFO L225 Difference]: With dead ends: 308 [2020-11-11 21:31:38,037 INFO L226 Difference]: Without dead ends: 306 [2020-11-11 21:31:38,038 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:31:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-11 21:31:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 258. [2020-11-11 21:31:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.782101167315175) internal successors, (715), 257 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 715 transitions. [2020-11-11 21:31:38,043 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 715 transitions. Word has length 14 [2020-11-11 21:31:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:38,043 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 715 transitions. [2020-11-11 21:31:38,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 715 transitions. [2020-11-11 21:31:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:38,043 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:38,044 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:38,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:38,244 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash -536471058, now seen corresponding path program 71 times [2020-11-11 21:31:38,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:38,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651064304] [2020-11-11 21:31:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:38,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651064304] [2020-11-11 21:31:38,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362719485] [2020-11-11 21:31:38,483 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 [2020-11-11 21:31:38,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:31:38,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:38,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:39,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:39,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:39,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767291299] [2020-11-11 21:31:39,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:39,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:39,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:39,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:39,052 INFO L87 Difference]: Start difference. First operand 258 states and 715 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:39,686 INFO L93 Difference]: Finished difference Result 327 states and 846 transitions. [2020-11-11 21:31:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:31:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:39,690 INFO L225 Difference]: With dead ends: 327 [2020-11-11 21:31:39,690 INFO L226 Difference]: Without dead ends: 325 [2020-11-11 21:31:39,691 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:31:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-11-11 21:31:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 258. [2020-11-11 21:31:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.782101167315175) internal successors, (715), 257 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 715 transitions. [2020-11-11 21:31:39,696 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 715 transitions. Word has length 14 [2020-11-11 21:31:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:39,697 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 715 transitions. [2020-11-11 21:31:39,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 715 transitions. [2020-11-11 21:31:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:39,698 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:39,698 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:39,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:39,899 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash -536441267, now seen corresponding path program 72 times [2020-11-11 21:31:39,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:39,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092100808] [2020-11-11 21:31:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092100808] [2020-11-11 21:31:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183150365] [2020-11-11 21:31:40,130 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 [2020-11-11 21:31:40,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:31:40,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:40,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:40,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:40,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:40,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937643314] [2020-11-11 21:31:40,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:40,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:40,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:40,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:40,711 INFO L87 Difference]: Start difference. First operand 258 states and 715 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:41,480 INFO L93 Difference]: Finished difference Result 343 states and 880 transitions. [2020-11-11 21:31:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:31:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:41,485 INFO L225 Difference]: With dead ends: 343 [2020-11-11 21:31:41,485 INFO L226 Difference]: Without dead ends: 341 [2020-11-11 21:31:41,485 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:31:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-11 21:31:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 258. [2020-11-11 21:31:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.782101167315175) internal successors, (715), 257 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 715 transitions. [2020-11-11 21:31:41,491 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 715 transitions. Word has length 14 [2020-11-11 21:31:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:41,491 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 715 transitions. [2020-11-11 21:31:41,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 715 transitions. [2020-11-11 21:31:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:41,492 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:41,492 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:41,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:41,693 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash -507813077, now seen corresponding path program 73 times [2020-11-11 21:31:41,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:41,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661476003] [2020-11-11 21:31:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:41,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661476003] [2020-11-11 21:31:41,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905094135] [2020-11-11 21:31:41,924 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 [2020-11-11 21:31:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:41,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:41,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:42,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:42,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:42,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687969068] [2020-11-11 21:31:42,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:42,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:42,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:42,440 INFO L87 Difference]: Start difference. First operand 258 states and 715 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:43,173 INFO L93 Difference]: Finished difference Result 354 states and 899 transitions. [2020-11-11 21:31:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:31:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:43,177 INFO L225 Difference]: With dead ends: 354 [2020-11-11 21:31:43,177 INFO L226 Difference]: Without dead ends: 352 [2020-11-11 21:31:43,178 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:31:43,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-11-11 21:31:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 261. [2020-11-11 21:31:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7846153846153845) internal successors, (724), 260 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 724 transitions. [2020-11-11 21:31:43,183 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 724 transitions. Word has length 14 [2020-11-11 21:31:43,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:43,183 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 724 transitions. [2020-11-11 21:31:43,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:43,184 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 724 transitions. [2020-11-11 21:31:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:43,184 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:43,184 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:43,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:43,385 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash -506888595, now seen corresponding path program 74 times [2020-11-11 21:31:43,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:43,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114073138] [2020-11-11 21:31:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:43,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114073138] [2020-11-11 21:31:43,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720268000] [2020-11-11 21:31:43,622 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 [2020-11-11 21:31:43,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:43,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:44,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:44,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27353396] [2020-11-11 21:31:44,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:44,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:44,139 INFO L87 Difference]: Start difference. First operand 261 states and 724 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:44,864 INFO L93 Difference]: Finished difference Result 336 states and 861 transitions. [2020-11-11 21:31:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:31:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:44,868 INFO L225 Difference]: With dead ends: 336 [2020-11-11 21:31:44,869 INFO L226 Difference]: Without dead ends: 334 [2020-11-11 21:31:44,869 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:31:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-11 21:31:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 260. [2020-11-11 21:31:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7683397683397684) internal successors, (717), 259 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 717 transitions. [2020-11-11 21:31:44,875 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 717 transitions. Word has length 14 [2020-11-11 21:31:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:44,875 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 717 transitions. [2020-11-11 21:31:44,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 717 transitions. [2020-11-11 21:31:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:44,876 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:44,876 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:45,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-11 21:31:45,076 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash -885548369, now seen corresponding path program 75 times [2020-11-11 21:31:45,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:45,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447035867] [2020-11-11 21:31:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:45,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447035867] [2020-11-11 21:31:45,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513678661] [2020-11-11 21:31:45,323 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 [2020-11-11 21:31:45,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:31:45,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:45,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:45,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:45,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:45,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891449377] [2020-11-11 21:31:45,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:45,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:45,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:45,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:45,895 INFO L87 Difference]: Start difference. First operand 260 states and 717 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:48,024 INFO L93 Difference]: Finished difference Result 352 states and 891 transitions. [2020-11-11 21:31:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:31:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:48,028 INFO L225 Difference]: With dead ends: 352 [2020-11-11 21:31:48,028 INFO L226 Difference]: Without dead ends: 347 [2020-11-11 21:31:48,029 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 21:31:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-11-11 21:31:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 262. [2020-11-11 21:31:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7701149425287355) internal successors, (723), 261 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 723 transitions. [2020-11-11 21:31:48,035 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 723 transitions. Word has length 14 [2020-11-11 21:31:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:48,035 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 723 transitions. [2020-11-11 21:31:48,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 723 transitions. [2020-11-11 21:31:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:48,036 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:48,036 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:48,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:48,237 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash -885519539, now seen corresponding path program 76 times [2020-11-11 21:31:48,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:48,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59193393] [2020-11-11 21:31:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:48,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59193393] [2020-11-11 21:31:48,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34145220] [2020-11-11 21:31:48,497 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 [2020-11-11 21:31:48,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:48,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:48,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:48,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:49,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:49,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:49,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944719101] [2020-11-11 21:31:49,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:49,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:49,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:49,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:49,097 INFO L87 Difference]: Start difference. First operand 262 states and 723 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:51,776 INFO L93 Difference]: Finished difference Result 363 states and 917 transitions. [2020-11-11 21:31:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:31:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:51,781 INFO L225 Difference]: With dead ends: 363 [2020-11-11 21:31:51,781 INFO L226 Difference]: Without dead ends: 358 [2020-11-11 21:31:51,781 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=481, Invalid=1159, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-11 21:31:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 263. [2020-11-11 21:31:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7786259541984735) internal successors, (728), 262 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 728 transitions. [2020-11-11 21:31:51,786 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 728 transitions. Word has length 14 [2020-11-11 21:31:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:51,787 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 728 transitions. [2020-11-11 21:31:51,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 728 transitions. [2020-11-11 21:31:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:51,787 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:51,787 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:51,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 21:31:51,988 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:51,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash -885518578, now seen corresponding path program 77 times [2020-11-11 21:31:51,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:51,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486498410] [2020-11-11 21:31:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:52,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486498410] [2020-11-11 21:31:52,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307980473] [2020-11-11 21:31:52,246 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 [2020-11-11 21:31:52,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:31:52,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:52,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:52,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:52,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:52,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:52,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696752235] [2020-11-11 21:31:52,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:52,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:52,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:52,857 INFO L87 Difference]: Start difference. First operand 263 states and 728 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:55,254 INFO L93 Difference]: Finished difference Result 376 states and 940 transitions. [2020-11-11 21:31:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:31:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:55,258 INFO L225 Difference]: With dead ends: 376 [2020-11-11 21:31:55,258 INFO L226 Difference]: Without dead ends: 371 [2020-11-11 21:31:55,259 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-11-11 21:31:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 260. [2020-11-11 21:31:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7683397683397684) internal successors, (717), 259 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 717 transitions. [2020-11-11 21:31:55,265 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 717 transitions. Word has length 14 [2020-11-11 21:31:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:55,265 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 717 transitions. [2020-11-11 21:31:55,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 717 transitions. [2020-11-11 21:31:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:55,265 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:55,265 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:55,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:55,466 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash -884595057, now seen corresponding path program 78 times [2020-11-11 21:31:55,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:55,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734826492] [2020-11-11 21:31:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:55,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734826492] [2020-11-11 21:31:55,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582814547] [2020-11-11 21:31:55,730 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 [2020-11-11 21:31:55,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:31:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:56,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:56,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:56,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:56,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121697651] [2020-11-11 21:31:56,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:56,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:56,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:56,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:56,365 INFO L87 Difference]: Start difference. First operand 260 states and 717 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:59,214 INFO L93 Difference]: Finished difference Result 399 states and 992 transitions. [2020-11-11 21:31:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:31:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:31:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:59,219 INFO L225 Difference]: With dead ends: 399 [2020-11-11 21:31:59,219 INFO L226 Difference]: Without dead ends: 391 [2020-11-11 21:31:59,219 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:31:59,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-11-11 21:31:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 249. [2020-11-11 21:31:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.725806451612903) internal successors, (676), 248 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 676 transitions. [2020-11-11 21:31:59,226 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 676 transitions. Word has length 14 [2020-11-11 21:31:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:59,226 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 676 transitions. [2020-11-11 21:31:59,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 676 transitions. [2020-11-11 21:31:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:59,227 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:59,227 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:59,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:59,440 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2877872, now seen corresponding path program 79 times [2020-11-11 21:31:59,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:59,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989680048] [2020-11-11 21:31:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989680048] [2020-11-11 21:31:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046166820] [2020-11-11 21:31:59,730 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 [2020-11-11 21:31:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:00,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:32:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:00,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:00,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:32:00,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836171108] [2020-11-11 21:32:00,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:32:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:32:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:32:00,259 INFO L87 Difference]: Start difference. First operand 249 states and 676 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:32:03,084 INFO L93 Difference]: Finished difference Result 399 states and 1014 transitions. [2020-11-11 21:32:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:32:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:32:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:32:03,088 INFO L225 Difference]: With dead ends: 399 [2020-11-11 21:32:03,089 INFO L226 Difference]: Without dead ends: 394 [2020-11-11 21:32:03,089 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 21:32:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-11-11 21:32:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 250. [2020-11-11 21:32:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.7349397590361444) internal successors, (681), 249 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 681 transitions. [2020-11-11 21:32:03,095 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 681 transitions. Word has length 14 [2020-11-11 21:32:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:32:03,095 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 681 transitions. [2020-11-11 21:32:03,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 681 transitions. [2020-11-11 21:32:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:32:03,096 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:32:03,096 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:03,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:03,300 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:03,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2878833, now seen corresponding path program 80 times [2020-11-11 21:32:03,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:03,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276835991] [2020-11-11 21:32:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:03,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276835991] [2020-11-11 21:32:03,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757937466] [2020-11-11 21:32:03,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:32:03,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:32:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:32:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:32:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:04,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:32:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:04,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:04,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:32:04,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591643502] [2020-11-11 21:32:04,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:32:04,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:04,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:32:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:32:04,049 INFO L87 Difference]: Start difference. First operand 250 states and 681 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:32:06,326 INFO L93 Difference]: Finished difference Result 433 states and 1097 transitions. [2020-11-11 21:32:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:32:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:32:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:32:06,331 INFO L225 Difference]: With dead ends: 433 [2020-11-11 21:32:06,331 INFO L226 Difference]: Without dead ends: 425 [2020-11-11 21:32:06,332 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:32:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-11-11 21:32:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 247. [2020-11-11 21:32:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.7154471544715446) internal successors, (668), 246 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 668 transitions. [2020-11-11 21:32:06,337 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 668 transitions. Word has length 14 [2020-11-11 21:32:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:32:06,338 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 668 transitions. [2020-11-11 21:32:06,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 668 transitions. [2020-11-11 21:32:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:32:06,338 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:32:06,338 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:06,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:06,539 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2907663, now seen corresponding path program 81 times [2020-11-11 21:32:06,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:06,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593468968] [2020-11-11 21:32:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593468968] [2020-11-11 21:32:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783116612] [2020-11-11 21:32:06,798 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 [2020-11-11 21:32:06,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:32:06,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:32:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:32:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:07,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:32:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:07,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:07,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:32:07,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700722042] [2020-11-11 21:32:07,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:32:07,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:07,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:32:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:32:07,304 INFO L87 Difference]: Start difference. First operand 247 states and 668 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2020-11-11 21:32:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:32:08,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:08,336 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 21:32:08,340 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 21:32:08,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 09:32:08 BasicIcfg [2020-11-11 21:32:08,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 21:32:08,343 INFO L168 Benchmark]: Toolchain (without parser) took 863365.95 ms. Allocated memory was 302.0 MB in the beginning and 448.8 MB in the end (delta: 146.8 MB). Free memory was 275.2 MB in the beginning and 252.5 MB in the end (delta: 22.8 MB). Peak memory consumption was 171.3 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,344 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 302.0 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:32:08,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 757.34 ms. Allocated memory is still 302.0 MB. Free memory was 274.6 MB in the beginning and 278.3 MB in the end (delta: -3.7 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.11 ms. Allocated memory is still 302.0 MB. Free memory was 278.3 MB in the beginning and 276.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,345 INFO L168 Benchmark]: Boogie Preprocessor took 33.21 ms. Allocated memory is still 302.0 MB. Free memory was 276.2 MB in the beginning and 275.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:32:08,346 INFO L168 Benchmark]: RCFGBuilder took 598.28 ms. Allocated memory is still 302.0 MB. Free memory was 275.2 MB in the beginning and 254.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,346 INFO L168 Benchmark]: TraceAbstraction took 861914.50 ms. Allocated memory was 302.0 MB in the beginning and 448.8 MB in the end (delta: 146.8 MB). Free memory was 253.1 MB in the beginning and 252.5 MB in the end (delta: 663.0 kB). Peak memory consumption was 146.4 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 302.0 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 757.34 ms. Allocated memory is still 302.0 MB. Free memory was 274.6 MB in the beginning and 278.3 MB in the end (delta: -3.7 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 49.11 ms. Allocated memory is still 302.0 MB. Free memory was 278.3 MB in the beginning and 276.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.21 ms. Allocated memory is still 302.0 MB. Free memory was 276.2 MB in the beginning and 275.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 598.28 ms. Allocated memory is still 302.0 MB. Free memory was 275.2 MB in the beginning and 254.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 861914.50 ms. Allocated memory was 302.0 MB in the beginning and 448.8 MB in the end (delta: 146.8 MB). Free memory was 253.1 MB in the beginning and 252.5 MB in the end (delta: 663.0 kB). Peak memory consumption was 146.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 847 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 17 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.1s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 1222 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (247states) and FLOYD_HOARE automaton (currently 12 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 25 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 861.7s, OverallIterations: 95, TraceHistogramMax: 7, AutomataDifference: 777.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 1377 SDtfs, 14641 SDslu, 11774 SDs, 0 SdLazy, 10120 SolverSat, 3175 SolverUnsat, 190 SolverUnknown, 0 SolverNotchecked, 386.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3294 GetRequests, 440 SyntacticMatches, 89 SemanticMatches, 2764 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 24772 ImplicationChecksByTransitivity, 427.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=264occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 94 MinimizatonAttempts, 7200 StatesRemovedByMinimization, 93 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 54.6s InterpolantComputationTime, 2370 NumberOfCodeBlocks, 2370 NumberOfCodeBlocksAsserted, 288 NumberOfCheckSat, 2186 ConstructedInterpolants, 5 QuantifiedInterpolants, 302677 SizeOfPredicates, 88 NumberOfNonLiveVariables, 9166 ConjunctsInSsa, 901 ConjunctsInUnsatCore, 184 InterpolantComputations, 7 PerfectInterpolantSequences, 21/1058 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