/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 10:46:39,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 10:46:39,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 10:46:39,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 10:46:39,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 10:46:39,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 10:46:39,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 10:46:39,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 10:46:39,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 10:46:39,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 10:46:39,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 10:46:39,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 10:46:39,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 10:46:39,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 10:46:39,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 10:46:39,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 10:46:39,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 10:46:39,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 10:46:39,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 10:46:39,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 10:46:39,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 10:46:39,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 10:46:39,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 10:46:39,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 10:46:39,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 10:46:39,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 10:46:39,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 10:46:39,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 10:46:39,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 10:46:39,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 10:46:39,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 10:46:39,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 10:46:39,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 10:46:39,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 10:46:39,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 10:46:39,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 10:46:39,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 10:46:39,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 10:46:39,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 10:46:39,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 10:46:39,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 10:46:39,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 10:46:39,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 10:46:39,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 10:46:39,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 10:46:39,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 10:46:39,447 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 10:46:39,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 10:46:39,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 10:46:39,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 10:46:39,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 10:46:39,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 10:46:39,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 10:46:39,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 10:46:39,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 10:46:39,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 10:46:39,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 10:46:39,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 10:46:39,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 10:46:39,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 10:46:39,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 10:46:39,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 10:46:39,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 10:46:39,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:46:39,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 10:46:39,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 10:46:39,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 10:46:39,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 10:46:39,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 10:46:39,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 10:46:39,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 10:46:39,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 10:46:39,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 10:46:39,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 10:46:39,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 10:46:39,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 10:46:39,783 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 10:46:39,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-10-16 10:46:39,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd68e862/7e7420841ab64e53b2014324e4067410/FLAG893782b78 [2020-10-16 10:46:40,415 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 10:46:40,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-10-16 10:46:40,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd68e862/7e7420841ab64e53b2014324e4067410/FLAG893782b78 [2020-10-16 10:46:40,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd68e862/7e7420841ab64e53b2014324e4067410 [2020-10-16 10:46:40,709 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 10:46:40,711 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 10:46:40,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:40,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 10:46:40,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 10:46:40,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a0041fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:40, skipping insertion in model container [2020-10-16 10:46:40,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 10:46:40,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 10:46:41,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,231 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 10:46:41,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,370 INFO L208 MainTranslator]: Completed translation [2020-10-16 10:46:41,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41 WrapperNode [2020-10-16 10:46:41,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:41,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 10:46:41,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 10:46:41,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 10:46:41,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 10:46:41,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 10:46:41,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 10:46:41,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 10:46:41,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 10:46:41,563 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 10:46:41,563 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 10:46:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 10:46:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 10:46:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 10:46:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 10:46:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 10:46:41,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 10:46:41,566 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 10:46:41,935 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 10:46:41,935 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 10:46:41,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:41 BoogieIcfgContainer [2020-10-16 10:46:41,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 10:46:41,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 10:46:41,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 10:46:41,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 10:46:41,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 10:46:40" (1/3) ... [2020-10-16 10:46:41,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63385b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:41, skipping insertion in model container [2020-10-16 10:46:41,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (2/3) ... [2020-10-16 10:46:41,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63385b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:41, skipping insertion in model container [2020-10-16 10:46:41,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:41" (3/3) ... [2020-10-16 10:46:41,974 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-10-16 10:46:42,003 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 10:46:42,003 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 10:46:42,014 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 10:46:42,015 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 10:46:42,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,052 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,052 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,052 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,053 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,053 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,053 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,054 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,054 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,054 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,055 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,055 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,055 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,057 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,057 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,057 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,058 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,058 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,059 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,064 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,065 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,065 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,072 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,072 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,075 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 10:46:42,090 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 10:46:42,114 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 10:46:42,114 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 10:46:42,114 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 10:46:42,114 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 10:46:42,114 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 10:46:42,115 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 10:46:42,115 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 10:46:42,115 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 10:46:42,129 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 10:46:42,132 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,135 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,179 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-16 10:46:42,180 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 10:46:42,186 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 10:46:42,188 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-16 10:46:43,327 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-16 10:46:43,424 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-16 10:46:43,424 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-16 10:46:43,432 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-16 10:46:43,445 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 10:46:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 10:46:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 10:46:43,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:43,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 10:46:43,457 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:43,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-16 10:46:43,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:43,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447445809] [2020-10-16 10:46:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:43,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447445809] [2020-10-16 10:46:43,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:43,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 10:46:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340671994] [2020-10-16 10:46:43,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 10:46:43,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:43,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 10:46:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 10:46:43,754 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 10:46:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:43,830 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-16 10:46:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:46:43,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 10:46:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:43,845 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:46:43,845 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:46:43,847 INFO L677 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 [2020-10-16 10:46:43,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:46:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-16 10:46:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:46:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-16 10:46:43,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-16 10:46:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:43,892 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-16 10:46:43,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 10:46:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-16 10:46:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:43,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:43,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:43,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 10:46:43,895 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-16 10:46:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:43,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650184001] [2020-10-16 10:46:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650184001] [2020-10-16 10:46:44,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593027411] [2020-10-16 10:46:44,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,039 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-16 10:46:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,124 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-16 10:46:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:44,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,127 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:46:44,127 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 10:46:44,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 10:46:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-16 10:46:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:46:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 10:46:44,139 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-16 10:46:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,140 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 10:46:44,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 10:46:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:44,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 10:46:44,142 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-16 10:46:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773345597] [2020-10-16 10:46:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773345597] [2020-10-16 10:46:44,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595904413] [2020-10-16 10:46:44,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,241 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-16 10:46:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,270 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-16 10:46:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:46:44,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,272 INFO L225 Difference]: With dead ends: 73 [2020-10-16 10:46:44,272 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 10:46:44,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 10:46:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 10:46:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:46:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-16 10:46:44,283 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-16 10:46:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,283 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-16 10:46:44,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-16 10:46:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:44,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 10:46:44,285 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,286 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-16 10:46:44,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898195858] [2020-10-16 10:46:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898195858] [2020-10-16 10:46:44,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916693493] [2020-10-16 10:46:44,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,354 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-16 10:46:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,430 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-16 10:46:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:44,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,432 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:46:44,432 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:46:44,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:46:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-16 10:46:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:46:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-16 10:46:44,442 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-16 10:46:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,442 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-16 10:46:44,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-16 10:46:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:44,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,444 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 10:46:44,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-16 10:46:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023040253] [2020-10-16 10:46:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023040253] [2020-10-16 10:46:44,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277869119] [2020-10-16 10:46:44,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:44,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:44,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:44,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:44,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 10:46:44,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022432401] [2020-10-16 10:46:44,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:46:44,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:46:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:46:44,725 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-16 10:46:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,798 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-16 10:46:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:44,798 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-16 10:46:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,800 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:46:44,800 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:46:44,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:46:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-16 10:46:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:46:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-16 10:46:44,809 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-16 10:46:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,809 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-16 10:46:44,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:46:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-16 10:46:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:44,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,811 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,026 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-16 10:46:45,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981318512] [2020-10-16 10:46:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981318512] [2020-10-16 10:46:45,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103565082] [2020-10-16 10:46:45,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:45,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:45,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:45,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773156533] [2020-10-16 10:46:45,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,273 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-16 10:46:45,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,308 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 10:46:45,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 10:46:45,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:45,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,309 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:46:45,309 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:46:45,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:46:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-16 10:46:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:46:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-16 10:46:45,331 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-16 10:46:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,331 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-16 10:46:45,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-16 10:46:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:45,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,333 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,534 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-16 10:46:45,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38325862] [2020-10-16 10:46:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38325862] [2020-10-16 10:46:45,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281175147] [2020-10-16 10:46:45,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:45,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:45,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:45,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:45,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700567831] [2020-10-16 10:46:45,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:45,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:45,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,704 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-16 10:46:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,774 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-16 10:46:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:45,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,776 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:46:45,776 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:46:45,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:46:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:46:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-16 10:46:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:46:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-16 10:46:45,793 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-16 10:46:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,793 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-16 10:46:45,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-16 10:46:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:45,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,795 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:46,013 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-16 10:46:46,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890042795] [2020-10-16 10:46:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890042795] [2020-10-16 10:46:46,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520085854] [2020-10-16 10:46:46,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:46,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:46,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:46,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:46,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:46,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410724185] [2020-10-16 10:46:46,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:46,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:46,229 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-16 10:46:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,329 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 10:46:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:46,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,330 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:46:46,331 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:46:46,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:46:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-16 10:46:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:46:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 10:46:46,338 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-16 10:46:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,338 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 10:46:46,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 10:46:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:46,541 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-16 10:46:46,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304802160] [2020-10-16 10:46:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304802160] [2020-10-16 10:46:46,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741509954] [2020-10-16 10:46:46,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,630 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-16 10:46:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,664 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-16 10:46:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 10:46:46,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,667 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:46:46,667 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:46:46,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:46:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-16 10:46:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:46:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-16 10:46:46,679 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-16 10:46:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,680 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-16 10:46:46,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-16 10:46:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 10:46:46,686 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-16 10:46:46,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431946617] [2020-10-16 10:46:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431946617] [2020-10-16 10:46:46,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641634150] [2020-10-16 10:46:46,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,798 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-16 10:46:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,844 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-16 10:46:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:46,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,846 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:46:46,846 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:46:46,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:46:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-16 10:46:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:46:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-16 10:46:46,859 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-16 10:46:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,860 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-16 10:46:46,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-16 10:46:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 10:46:46,861 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-16 10:46:46,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546969100] [2020-10-16 10:46:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546969100] [2020-10-16 10:46:46,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3923790] [2020-10-16 10:46:46,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,948 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-16 10:46:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,030 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 10:46:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:47,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,032 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:46:47,033 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:46:47,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:46:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 10:46:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:46:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-16 10:46:47,038 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-16 10:46:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,039 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-16 10:46:47,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-16 10:46:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:47,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-16 10:46:47,040 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-16 10:46:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34007760] [2020-10-16 10:46:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34007760] [2020-10-16 10:46:47,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:47,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:47,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898764070] [2020-10-16 10:46:47,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:47,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:47,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:47,100 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-16 10:46:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,171 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 10:46:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:47,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,173 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:46:47,173 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:46:47,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:46:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 10:46:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:46:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-16 10:46:47,178 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-16 10:46:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,179 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-16 10:46:47,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-16 10:46:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,180 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:47,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 10:46:47,180 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:47,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-16 10:46:47,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:47,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925598854] [2020-10-16 10:46:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925598854] [2020-10-16 10:46:47,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770364280] [2020-10-16 10:46:47,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:47,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:47,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:47,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:47,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:47,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:47,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-16 10:46:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712066734] [2020-10-16 10:46:47,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:46:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:46:47,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:47,389 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-16 10:46:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,484 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-16 10:46:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:47,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-16 10:46:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,486 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:46:47,486 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:46:47,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:46:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:46:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-16 10:46:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:46:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-16 10:46:47,492 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-16 10:46:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,493 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-16 10:46:47,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:46:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-16 10:46:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,494 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:47,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 10:46:47,707 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:47,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-16 10:46:47,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:47,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323526005] [2020-10-16 10:46:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323526005] [2020-10-16 10:46:47,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182742756] [2020-10-16 10:46:47,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:47,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:47,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:47,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:47,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:47,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192410781] [2020-10-16 10:46:47,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:47,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:47,940 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-16 10:46:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,980 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 10:46:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:47,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,981 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:46:47,982 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:46:47,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:46:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 10:46:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 10:46:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-16 10:46:47,987 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-16 10:46:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,987 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-16 10:46:47,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-16 10:46:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,988 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:48,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:48,200 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-16 10:46:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:48,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834178494] [2020-10-16 10:46:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834178494] [2020-10-16 10:46:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483350668] [2020-10-16 10:46:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:48,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:48,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712645255] [2020-10-16 10:46:48,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:48,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:48,420 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-16 10:46:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:48,471 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-16 10:46:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:48,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:48,473 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:46:48,473 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:46:48,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:46:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-16 10:46:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:46:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-16 10:46:48,477 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-16 10:46:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:48,478 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-16 10:46:48,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-16 10:46:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:48,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:48,479 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:48,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 10:46:48,689 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-16 10:46:48,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:48,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229117803] [2020-10-16 10:46:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229117803] [2020-10-16 10:46:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703469859] [2020-10-16 10:46:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:48,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:48,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:48,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:48,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204137148] [2020-10-16 10:46:48,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:48,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:48,899 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-16 10:46:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:48,975 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-16 10:46:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:48,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:48,976 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:46:48,976 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:46:48,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:46:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-16 10:46:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:46:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-16 10:46:48,981 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-16 10:46:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:48,982 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-16 10:46:48,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-16 10:46:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:48,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:48,983 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:49,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 10:46:49,193 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-16 10:46:49,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:49,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034218100] [2020-10-16 10:46:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034218100] [2020-10-16 10:46:49,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927016648] [2020-10-16 10:46:49,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:49,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:49,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:49,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:49,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:49,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:49,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590836381] [2020-10-16 10:46:49,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:49,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:49,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,390 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-16 10:46:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:49,514 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-16 10:46:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:49,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:49,516 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:46:49,516 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:46:49,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:46:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-16 10:46:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:46:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-16 10:46:49,521 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-16 10:46:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:49,522 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-16 10:46:49,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-16 10:46:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:49,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:49,523 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:49,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 10:46:49,733 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:49,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-16 10:46:49,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:49,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793199083] [2020-10-16 10:46:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793199083] [2020-10-16 10:46:49,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17455451] [2020-10-16 10:46:49,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:49,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:49,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:49,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:49,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:49,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19693823] [2020-10-16 10:46:49,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,932 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-16 10:46:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:49,972 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-16 10:46:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:49,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:49,974 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:46:49,974 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:46:49,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:46:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-16 10:46:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 10:46:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-16 10:46:49,979 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-16 10:46:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:49,979 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-16 10:46:49,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-16 10:46:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:49,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:49,980 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:50,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 10:46:50,192 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:50,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-16 10:46:50,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:50,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448936887] [2020-10-16 10:46:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448936887] [2020-10-16 10:46:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355013414] [2020-10-16 10:46:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:50,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:50,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:50,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:50,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195288683] [2020-10-16 10:46:50,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:50,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:50,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:50,391 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-16 10:46:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:50,455 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-16 10:46:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:50,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:50,457 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:46:50,457 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:46:50,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:46:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-16 10:46:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 10:46:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-16 10:46:50,462 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-16 10:46:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:50,462 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-16 10:46:50,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-16 10:46:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:50,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:50,463 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:50,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:50,675 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-16 10:46:50,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:50,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870705258] [2020-10-16 10:46:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870705258] [2020-10-16 10:46:50,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130840148] [2020-10-16 10:46:50,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:50,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:50,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:50,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949006005] [2020-10-16 10:46:50,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:50,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:50,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:50,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:50,905 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-16 10:46:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:50,979 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-16 10:46:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:50,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:50,981 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:46:50,981 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:46:50,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:46:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-16 10:46:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 10:46:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-16 10:46:50,986 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-16 10:46:50,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:50,986 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-16 10:46:50,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-16 10:46:50,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:50,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:50,987 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:51,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:51,200 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-16 10:46:51,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:51,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354251360] [2020-10-16 10:46:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354251360] [2020-10-16 10:46:51,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505536468] [2020-10-16 10:46:51,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:51,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:51,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:51,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:51,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128425863] [2020-10-16 10:46:51,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:51,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:51,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:51,426 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-16 10:46:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:51,479 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-16 10:46:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:51,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:51,480 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:46:51,480 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:46:51,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:46:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-16 10:46:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 10:46:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-16 10:46:51,485 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-16 10:46:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:51,485 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-16 10:46:51,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-16 10:46:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:51,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:51,486 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:51,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 10:46:51,698 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-16 10:46:51,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:51,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376353140] [2020-10-16 10:46:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376353140] [2020-10-16 10:46:51,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329584537] [2020-10-16 10:46:51,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:51,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:51,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:51,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:51,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:51,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286890937] [2020-10-16 10:46:51,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:51,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:51,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:51,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:51,909 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:52,015 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-16 10:46:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:52,016 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:52,017 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:46:52,017 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:46:52,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:46:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 10:46:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-16 10:46:52,022 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-16 10:46:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:52,022 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-16 10:46:52,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-16 10:46:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:52,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:52,023 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:52,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:52,235 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-16 10:46:52,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:52,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143489223] [2020-10-16 10:46:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143489223] [2020-10-16 10:46:52,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588628206] [2020-10-16 10:46:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:52,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:52,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:52,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800793237] [2020-10-16 10:46:52,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:52,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:52,429 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-16 10:46:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:52,508 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 10:46:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:52,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:52,510 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:46:52,511 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:46:52,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:46:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-16 10:46:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 10:46:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-16 10:46:52,515 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-16 10:46:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:52,516 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-16 10:46:52,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-16 10:46:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:52,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:52,519 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:52,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 10:46:52,729 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-16 10:46:52,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:52,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415968898] [2020-10-16 10:46:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415968898] [2020-10-16 10:46:52,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178532391] [2020-10-16 10:46:52,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:52,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:52,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:52,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:52,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:52,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613493744] [2020-10-16 10:46:52,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:52,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:52,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:52,972 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-16 10:46:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:53,158 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 10:46:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:53,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:53,160 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:46:53,161 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:46:53,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:46:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-16 10:46:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 10:46:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-16 10:46:53,168 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-16 10:46:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:53,168 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-16 10:46:53,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-16 10:46:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:53,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:53,169 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:53,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:53,380 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-16 10:46:53,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:53,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231588867] [2020-10-16 10:46:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231588867] [2020-10-16 10:46:53,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418564165] [2020-10-16 10:46:53,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:53,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:53,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:53,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:53,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037441820] [2020-10-16 10:46:53,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:53,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:53,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:53,552 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:53,673 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 10:46:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:53,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:53,675 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:46:53,676 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:46:53,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:46:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-16 10:46:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 10:46:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 10:46:53,680 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 10:46:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:53,680 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 10:46:53,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 10:46:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:53,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:53,681 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:53,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 10:46:53,893 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-16 10:46:53,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:53,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986827529] [2020-10-16 10:46:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986827529] [2020-10-16 10:46:53,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836374167] [2020-10-16 10:46:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:53,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:54,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:54,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:54,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091577005] [2020-10-16 10:46:54,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:54,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:54,067 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 10:46:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:54,283 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-16 10:46:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:46:54,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:54,285 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:46:54,285 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 10:46:54,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:46:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 10:46:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-16 10:46:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 10:46:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 10:46:54,290 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 10:46:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:54,291 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 10:46:54,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 10:46:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:54,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:54,292 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:54,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 10:46:54,502 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-16 10:46:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:54,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461015899] [2020-10-16 10:46:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461015899] [2020-10-16 10:46:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771309568] [2020-10-16 10:46:54,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:54,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:54,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:54,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:54,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:54,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941101252] [2020-10-16 10:46:54,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:54,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:54,701 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 10:46:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:54,873 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 10:46:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:54,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:54,875 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:46:54,876 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:46:54,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:46:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 10:46:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-16 10:46:54,881 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-16 10:46:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:54,882 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-16 10:46:54,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-16 10:46:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:54,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:54,882 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:55,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 10:46:55,093 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-16 10:46:55,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:55,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160713604] [2020-10-16 10:46:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160713604] [2020-10-16 10:46:55,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922586790] [2020-10-16 10:46:55,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:55,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:55,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:55,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:55,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:55,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908482981] [2020-10-16 10:46:55,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:55,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:55,269 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-16 10:46:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:55,376 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-16 10:46:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:55,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:55,378 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:46:55,378 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:46:55,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:46:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-16 10:46:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 10:46:55,382 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 10:46:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:55,383 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 10:46:55,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 10:46:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:55,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:55,384 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:55,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 10:46:55,596 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-16 10:46:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:55,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110179597] [2020-10-16 10:46:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110179597] [2020-10-16 10:46:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033970407] [2020-10-16 10:46:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:55,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:55,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:55,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:55,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:55,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396326524] [2020-10-16 10:46:55,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:55,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:55,787 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 10:46:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:55,926 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-16 10:46:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:46:55,927 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:55,928 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:46:55,928 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:46:55,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:46:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:46:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-16 10:46:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 10:46:55,936 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 10:46:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:55,936 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 10:46:55,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 10:46:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:55,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:55,938 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:56,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 10:46:56,151 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-16 10:46:56,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:56,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516270180] [2020-10-16 10:46:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516270180] [2020-10-16 10:46:56,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027005238] [2020-10-16 10:46:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:56,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:56,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:56,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:56,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:56,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686021741] [2020-10-16 10:46:56,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:56,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:56,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:56,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:56,309 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:56,460 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-16 10:46:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:56,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:56,462 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:46:56,462 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 10:46:56,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 10:46:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-16 10:46:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 10:46:56,470 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 10:46:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:56,470 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 10:46:56,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 10:46:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:56,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:56,471 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:56,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:56,682 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-16 10:46:56,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:56,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140898842] [2020-10-16 10:46:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140898842] [2020-10-16 10:46:56,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598027105] [2020-10-16 10:46:56,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:56,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:56,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:56,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:56,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:56,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:56,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313691595] [2020-10-16 10:46:56,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:56,879 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:57,108 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-16 10:46:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:46:57,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:57,110 INFO L225 Difference]: With dead ends: 145 [2020-10-16 10:46:57,110 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 10:46:57,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:46:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 10:46:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-16 10:46:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 10:46:57,115 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 10:46:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:57,115 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 10:46:57,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 10:46:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:57,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:57,116 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:57,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-16 10:46:57,327 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-16 10:46:57,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:57,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574892992] [2020-10-16 10:46:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574892992] [2020-10-16 10:46:57,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957467007] [2020-10-16 10:46:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:57,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:57,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:57,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186489185] [2020-10-16 10:46:57,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:57,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:57,510 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 10:46:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:57,681 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-16 10:46:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:57,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:57,683 INFO L225 Difference]: With dead ends: 135 [2020-10-16 10:46:57,683 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:46:57,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:46:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-16 10:46:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 10:46:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-16 10:46:57,688 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-16 10:46:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:57,688 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-16 10:46:57,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-16 10:46:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:57,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:57,689 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:57,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:57,889 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-16 10:46:57,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:57,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75761983] [2020-10-16 10:46:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75761983] [2020-10-16 10:46:57,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977766407] [2020-10-16 10:46:57,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:57,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:57,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:58,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:58,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-16 10:46:58,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199603204] [2020-10-16 10:46:58,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:46:58,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:58,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:46:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:58,101 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-16 10:46:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:58,241 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-16 10:46:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:46:58,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-16 10:46:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:58,242 INFO L225 Difference]: With dead ends: 143 [2020-10-16 10:46:58,242 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:46:58,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:46:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:46:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-16 10:46:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 10:46:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-16 10:46:58,247 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-16 10:46:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:58,247 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-16 10:46:58,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:46:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-16 10:46:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:58,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:58,248 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:58,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 10:46:58,458 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-16 10:46:58,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:58,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243160161] [2020-10-16 10:46:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243160161] [2020-10-16 10:46:58,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822330615] [2020-10-16 10:46:58,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:58,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:58,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:58,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:58,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66826518] [2020-10-16 10:46:58,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:58,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:58,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:58,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:58,718 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-16 10:46:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:58,760 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-16 10:46:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:58,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:58,761 INFO L225 Difference]: With dead ends: 132 [2020-10-16 10:46:58,761 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:46:58,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:46:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-16 10:46:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 10:46:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 10:46:58,765 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 10:46:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:58,765 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 10:46:58,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 10:46:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:58,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:58,766 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:58,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 10:46:58,967 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:58,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-16 10:46:58,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:58,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099112179] [2020-10-16 10:46:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099112179] [2020-10-16 10:46:59,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503849920] [2020-10-16 10:46:59,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:59,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:46:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:59,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347880941] [2020-10-16 10:46:59,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:59,231 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 10:46:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:59,308 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-16 10:46:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:59,309 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:59,311 INFO L225 Difference]: With dead ends: 143 [2020-10-16 10:46:59,311 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 10:46:59,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 10:46:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-16 10:46:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 10:46:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 10:46:59,317 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 10:46:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:59,317 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 10:46:59,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 10:46:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:59,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:59,319 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:59,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 10:46:59,531 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-16 10:46:59,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:59,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108192070] [2020-10-16 10:46:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108192070] [2020-10-16 10:46:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836043402] [2020-10-16 10:46:59,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:59,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:46:59,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:59,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696896883] [2020-10-16 10:46:59,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:59,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:59,786 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 10:46:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:59,860 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-16 10:46:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:59,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:59,862 INFO L225 Difference]: With dead ends: 142 [2020-10-16 10:46:59,862 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 10:46:59,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 10:46:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-16 10:46:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-16 10:46:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-16 10:46:59,866 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-16 10:46:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:59,866 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-16 10:46:59,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-16 10:46:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:59,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:59,867 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:00,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 10:47:00,078 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:00,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-16 10:47:00,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:00,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539861354] [2020-10-16 10:47:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539861354] [2020-10-16 10:47:00,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290265715] [2020-10-16 10:47:00,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:00,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:00,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967046880] [2020-10-16 10:47:00,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:00,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:00,284 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-16 10:47:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:00,384 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-16 10:47:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:00,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:47:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:00,386 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:47:00,386 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:47:00,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:47:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-16 10:47:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 10:47:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-16 10:47:00,390 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-16 10:47:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:00,390 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-16 10:47:00,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-16 10:47:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:47:00,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:00,391 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:00,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 10:47:00,600 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-16 10:47:00,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:00,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56370372] [2020-10-16 10:47:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56370372] [2020-10-16 10:47:00,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147354558] [2020-10-16 10:47:00,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:00,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:00,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:00,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:00,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:00,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:00,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514951241] [2020-10-16 10:47:00,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:00,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:00,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:00,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:00,792 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-16 10:47:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:00,950 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 10:47:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:00,950 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:47:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:00,951 INFO L225 Difference]: With dead ends: 150 [2020-10-16 10:47:00,951 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 10:47:00,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 10:47:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-16 10:47:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-16 10:47:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-16 10:47:00,955 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-16 10:47:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:00,955 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-16 10:47:00,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-16 10:47:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:00,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:00,957 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:01,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:01,158 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-16 10:47:01,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:01,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915783037] [2020-10-16 10:47:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915783037] [2020-10-16 10:47:01,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536441056] [2020-10-16 10:47:01,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:01,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:01,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:01,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:01,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:01,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47078571] [2020-10-16 10:47:01,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:01,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:01,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,369 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-16 10:47:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:01,416 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-16 10:47:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:47:01,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:01,418 INFO L225 Difference]: With dead ends: 138 [2020-10-16 10:47:01,419 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 10:47:01,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 10:47:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-16 10:47:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-16 10:47:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-16 10:47:01,423 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-16 10:47:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:01,423 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-16 10:47:01,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-16 10:47:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:01,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:01,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:01,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 10:47:01,634 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-16 10:47:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:01,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163366382] [2020-10-16 10:47:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163366382] [2020-10-16 10:47:01,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230655235] [2020-10-16 10:47:01,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:01,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:01,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:01,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128603723] [2020-10-16 10:47:01,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:01,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:01,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,890 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-16 10:47:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:02,003 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 10:47:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:02,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:02,008 INFO L225 Difference]: With dead ends: 145 [2020-10-16 10:47:02,008 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 10:47:02,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 10:47:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-16 10:47:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-16 10:47:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-16 10:47:02,012 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-16 10:47:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:02,012 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-16 10:47:02,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-16 10:47:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:02,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:02,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:02,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 10:47:02,220 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-16 10:47:02,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078428874] [2020-10-16 10:47:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078428874] [2020-10-16 10:47:02,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043186503] [2020-10-16 10:47:02,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:02,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:02,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:02,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995429713] [2020-10-16 10:47:02,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:02,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:02,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:02,443 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-16 10:47:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:02,573 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 10:47:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:02,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:02,575 INFO L225 Difference]: With dead ends: 150 [2020-10-16 10:47:02,575 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 10:47:02,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 10:47:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-16 10:47:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 10:47:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-16 10:47:02,579 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-16 10:47:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:02,580 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-16 10:47:02,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-16 10:47:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:02,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:02,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:02,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:02,781 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-16 10:47:02,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:02,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238272482] [2020-10-16 10:47:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238272482] [2020-10-16 10:47:02,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405275313] [2020-10-16 10:47:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:02,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:02,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:02,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:03,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:03,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472342859] [2020-10-16 10:47:03,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:03,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:03,004 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:03,115 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-16 10:47:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:03,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:03,117 INFO L225 Difference]: With dead ends: 148 [2020-10-16 10:47:03,117 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 10:47:03,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 10:47:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-16 10:47:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 10:47:03,121 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 10:47:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:03,121 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 10:47:03,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 10:47:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:03,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:03,122 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:03,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 10:47:03,332 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-16 10:47:03,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:03,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445489931] [2020-10-16 10:47:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445489931] [2020-10-16 10:47:03,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134377892] [2020-10-16 10:47:03,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:03,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:03,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:03,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:03,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894141514] [2020-10-16 10:47:03,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:03,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:03,530 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 10:47:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:03,659 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-16 10:47:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:03,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:03,661 INFO L225 Difference]: With dead ends: 149 [2020-10-16 10:47:03,661 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 10:47:03,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 10:47:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-16 10:47:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-16 10:47:03,665 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-16 10:47:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:03,665 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-16 10:47:03,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-16 10:47:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:03,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:03,666 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:03,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:03,877 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-16 10:47:03,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:03,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869016226] [2020-10-16 10:47:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869016226] [2020-10-16 10:47:03,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269402750] [2020-10-16 10:47:03,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:04,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:04,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:04,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852345965] [2020-10-16 10:47:04,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:04,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:04,143 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-16 10:47:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:04,208 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-16 10:47:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:04,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:04,210 INFO L225 Difference]: With dead ends: 152 [2020-10-16 10:47:04,210 INFO L226 Difference]: Without dead ends: 150 [2020-10-16 10:47:04,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:47:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-16 10:47:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-16 10:47:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-16 10:47:04,214 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-16 10:47:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:04,214 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-16 10:47:04,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-16 10:47:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:04,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:04,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:04,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 10:47:04,424 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-16 10:47:04,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:04,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656051550] [2020-10-16 10:47:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656051550] [2020-10-16 10:47:04,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403740192] [2020-10-16 10:47:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:04,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:04,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:04,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562951681] [2020-10-16 10:47:04,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:04,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:04,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:04,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:04,656 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-16 10:47:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:04,797 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-16 10:47:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:04,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:04,799 INFO L225 Difference]: With dead ends: 153 [2020-10-16 10:47:04,799 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 10:47:04,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 10:47:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-16 10:47:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 10:47:04,803 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 10:47:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:04,804 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 10:47:04,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 10:47:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:04,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:04,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:05,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 10:47:05,015 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-16 10:47:05,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:05,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277352547] [2020-10-16 10:47:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277352547] [2020-10-16 10:47:05,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225702221] [2020-10-16 10:47:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:05,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:05,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:05,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833209946] [2020-10-16 10:47:05,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:05,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:05,207 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 10:47:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:05,356 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:05,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:05,358 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:05,358 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 10:47:05,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 10:47:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-16 10:47:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 10:47:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-16 10:47:05,363 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-16 10:47:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:05,363 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-16 10:47:05,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-16 10:47:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:05,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:05,364 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:05,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 10:47:05,568 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-16 10:47:05,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:05,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469931865] [2020-10-16 10:47:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469931865] [2020-10-16 10:47:05,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713558415] [2020-10-16 10:47:05,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:05,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:05,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:05,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133461604] [2020-10-16 10:47:05,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:05,784 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-16 10:47:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:05,865 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-16 10:47:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:05,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:05,867 INFO L225 Difference]: With dead ends: 148 [2020-10-16 10:47:05,867 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 10:47:05,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 10:47:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-16 10:47:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 10:47:05,872 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 10:47:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:05,872 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 10:47:05,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 10:47:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:05,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:05,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:06,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 10:47:06,082 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-16 10:47:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:06,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904728618] [2020-10-16 10:47:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904728618] [2020-10-16 10:47:06,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510247457] [2020-10-16 10:47:06,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:06,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:06,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:06,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:06,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631363062] [2020-10-16 10:47:06,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:06,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:06,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:06,296 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:06,466 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-16 10:47:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:06,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:06,468 INFO L225 Difference]: With dead ends: 157 [2020-10-16 10:47:06,468 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 10:47:06,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 10:47:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-16 10:47:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-16 10:47:06,472 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-16 10:47:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:06,472 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-16 10:47:06,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-16 10:47:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:06,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:06,473 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:06,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:06,677 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:06,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:06,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-16 10:47:06,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:06,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985639551] [2020-10-16 10:47:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985639551] [2020-10-16 10:47:06,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261317310] [2020-10-16 10:47:06,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:06,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:06,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:06,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:47:06,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:06,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:47:06,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692164852] [2020-10-16 10:47:06,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:47:06,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:47:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:47:06,813 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-16 10:47:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:06,906 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 10:47:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:06,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:47:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:06,908 INFO L225 Difference]: With dead ends: 149 [2020-10-16 10:47:06,908 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 10:47:06,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:47:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 10:47:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-16 10:47:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:06,912 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:06,912 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:06,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:47:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:06,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:06,913 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:07,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 10:47:07,114 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-16 10:47:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:07,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871475460] [2020-10-16 10:47:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871475460] [2020-10-16 10:47:07,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058098555] [2020-10-16 10:47:07,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:07,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:07,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:07,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:07,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191449125] [2020-10-16 10:47:07,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:07,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:07,327 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:07,581 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-16 10:47:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:07,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:07,583 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:07,583 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:07,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 10:47:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-16 10:47:07,587 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-16 10:47:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:07,588 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-16 10:47:07,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-16 10:47:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:07,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:07,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:07,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 10:47:07,800 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-16 10:47:07,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:07,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555794223] [2020-10-16 10:47:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555794223] [2020-10-16 10:47:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374222305] [2020-10-16 10:47:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:07,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:07,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:07,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:08,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:08,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980836114] [2020-10-16 10:47:08,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:08,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:08,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:08,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:08,013 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:08,196 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:08,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:08,198 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:08,199 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 10:47:08,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 10:47:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-16 10:47:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:08,202 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:08,203 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:08,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:08,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:08,204 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:08,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:08,404 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-16 10:47:08,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:08,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334764011] [2020-10-16 10:47:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334764011] [2020-10-16 10:47:08,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214648695] [2020-10-16 10:47:08,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:08,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:08,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:08,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:08,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:08,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:08,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110443480] [2020-10-16 10:47:08,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:08,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:08,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:08,710 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:09,167 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-16 10:47:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:09,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:09,170 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:09,170 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 10:47:09,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:47:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 10:47:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-16 10:47:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:09,178 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:09,178 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:09,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:09,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:09,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:09,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-16 10:47:09,380 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-16 10:47:09,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:09,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219772924] [2020-10-16 10:47:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219772924] [2020-10-16 10:47:09,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894471946] [2020-10-16 10:47:09,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:09,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:09,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:09,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:09,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:09,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:09,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639861237] [2020-10-16 10:47:09,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:09,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:09,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:09,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:09,580 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:09,832 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-16 10:47:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:09,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:09,834 INFO L225 Difference]: With dead ends: 166 [2020-10-16 10:47:09,834 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:09,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:09,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-16 10:47:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-16 10:47:09,839 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-16 10:47:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:09,839 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-16 10:47:09,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-16 10:47:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:09,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:09,840 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:10,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:10,051 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-16 10:47:10,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:10,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974610352] [2020-10-16 10:47:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974610352] [2020-10-16 10:47:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998266059] [2020-10-16 10:47:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:10,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:10,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:10,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:10,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104961996] [2020-10-16 10:47:10,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:10,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:10,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:10,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:10,233 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-16 10:47:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:10,414 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-16 10:47:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:10,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:10,416 INFO L225 Difference]: With dead ends: 163 [2020-10-16 10:47:10,416 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:10,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-16 10:47:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-16 10:47:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-16 10:47:10,421 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-16 10:47:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:10,421 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-16 10:47:10,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-16 10:47:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:10,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:10,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:10,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 10:47:10,631 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-16 10:47:10,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:10,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104178793] [2020-10-16 10:47:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104178793] [2020-10-16 10:47:10,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214059050] [2020-10-16 10:47:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:10,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:10,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:10,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:10,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500129240] [2020-10-16 10:47:10,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:10,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:10,846 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:11,108 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-16 10:47:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:11,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:11,111 INFO L225 Difference]: With dead ends: 170 [2020-10-16 10:47:11,111 INFO L226 Difference]: Without dead ends: 168 [2020-10-16 10:47:11,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-16 10:47:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-16 10:47:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 10:47:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-16 10:47:11,114 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-16 10:47:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:11,115 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-16 10:47:11,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-16 10:47:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:11,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:11,115 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:11,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:11,316 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:11,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-16 10:47:11,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:11,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591726536] [2020-10-16 10:47:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:11,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591726536] [2020-10-16 10:47:11,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824768760] [2020-10-16 10:47:11,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:11,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:11,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:11,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689315987] [2020-10-16 10:47:11,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:11,499 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-16 10:47:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:11,806 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 10:47:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:11,807 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:11,809 INFO L225 Difference]: With dead ends: 177 [2020-10-16 10:47:11,809 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 10:47:11,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 10:47:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-16 10:47:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-16 10:47:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-16 10:47:11,812 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-16 10:47:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:11,813 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-16 10:47:11,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-16 10:47:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:11,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:11,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:12,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 10:47:12,023 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-16 10:47:12,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:12,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219084243] [2020-10-16 10:47:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219084243] [2020-10-16 10:47:12,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51760557] [2020-10-16 10:47:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:12,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:12,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:12,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:12,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:12,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:12,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787977292] [2020-10-16 10:47:12,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:12,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:12,216 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-16 10:47:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:12,599 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-16 10:47:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:12,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:12,602 INFO L225 Difference]: With dead ends: 190 [2020-10-16 10:47:12,602 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 10:47:12,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 10:47:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-16 10:47:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-16 10:47:12,607 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-16 10:47:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:12,607 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-16 10:47:12,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-16 10:47:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:12,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:12,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:12,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 10:47:12,809 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:12,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-16 10:47:12,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:12,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221649614] [2020-10-16 10:47:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221649614] [2020-10-16 10:47:12,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507667725] [2020-10-16 10:47:12,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:12,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:12,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:12,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:12,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:13,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:13,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993568356] [2020-10-16 10:47:13,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:13,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:13,010 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-16 10:47:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:13,366 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-16 10:47:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:13,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:13,368 INFO L225 Difference]: With dead ends: 180 [2020-10-16 10:47:13,368 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 10:47:13,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 10:47:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-16 10:47:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-16 10:47:13,373 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-16 10:47:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:13,373 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-16 10:47:13,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-16 10:47:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:13,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:13,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:13,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 10:47:13,585 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-16 10:47:13,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255354607] [2020-10-16 10:47:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255354607] [2020-10-16 10:47:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892117688] [2020-10-16 10:47:13,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:13,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:13,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:13,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:13,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:13,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:13,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850920401] [2020-10-16 10:47:13,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:13,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:13,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:13,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:13,783 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-16 10:47:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:13,926 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-16 10:47:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:13,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:13,928 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:13,928 INFO L226 Difference]: Without dead ends: 162 [2020-10-16 10:47:13,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-16 10:47:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-16 10:47:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-16 10:47:13,933 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-16 10:47:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:13,933 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-16 10:47:13,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-16 10:47:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:13,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:13,934 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:14,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 10:47:14,136 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:14,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-16 10:47:14,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:14,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673305173] [2020-10-16 10:47:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673305173] [2020-10-16 10:47:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649831902] [2020-10-16 10:47:14,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:14,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:14,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:14,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:14,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:14,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435544415] [2020-10-16 10:47:14,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:14,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:14,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:14,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:14,332 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-16 10:47:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:14,481 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-16 10:47:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:14,482 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:14,483 INFO L225 Difference]: With dead ends: 161 [2020-10-16 10:47:14,483 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:14,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:14,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-16 10:47:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-16 10:47:14,487 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-16 10:47:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:14,487 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-16 10:47:14,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-16 10:47:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:14,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:14,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:14,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 10:47:14,696 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-16 10:47:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:14,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099493608] [2020-10-16 10:47:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099493608] [2020-10-16 10:47:14,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138423657] [2020-10-16 10:47:14,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:14,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:47:14,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:14,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:14,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:14,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22447011] [2020-10-16 10:47:14,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:14,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:14,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:14,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:14,925 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-16 10:47:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:15,125 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-16 10:47:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:15,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:15,127 INFO L225 Difference]: With dead ends: 165 [2020-10-16 10:47:15,127 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 10:47:15,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 10:47:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-16 10:47:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-16 10:47:15,131 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-16 10:47:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:15,131 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-16 10:47:15,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-16 10:47:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:15,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:15,132 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:15,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 10:47:15,341 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:15,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-16 10:47:15,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:15,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984703332] [2020-10-16 10:47:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984703332] [2020-10-16 10:47:15,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646307713] [2020-10-16 10:47:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:15,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:15,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793960555] [2020-10-16 10:47:15,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:15,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:15,607 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-16 10:47:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:15,794 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-16 10:47:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:15,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:15,796 INFO L225 Difference]: With dead ends: 167 [2020-10-16 10:47:15,796 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 10:47:15,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 10:47:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-16 10:47:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 10:47:15,800 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 10:47:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:15,800 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 10:47:15,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 10:47:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:15,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:15,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:16,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:16,013 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-16 10:47:16,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:16,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704749665] [2020-10-16 10:47:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704749665] [2020-10-16 10:47:16,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563924007] [2020-10-16 10:47:16,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:16,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:16,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:16,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:16,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:16,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848567608] [2020-10-16 10:47:16,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:16,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:16,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:16,196 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:16,459 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-16 10:47:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:16,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:16,462 INFO L225 Difference]: With dead ends: 168 [2020-10-16 10:47:16,462 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 10:47:16,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 10:47:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-16 10:47:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 10:47:16,466 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 10:47:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:16,466 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 10:47:16,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 10:47:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:16,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:16,467 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:16,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:16,669 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-16 10:47:16,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:16,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649111350] [2020-10-16 10:47:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649111350] [2020-10-16 10:47:16,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37121029] [2020-10-16 10:47:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:16,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:16,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:16,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:16,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:16,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369205808] [2020-10-16 10:47:16,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:16,851 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:17,056 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-16 10:47:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:17,057 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:17,058 INFO L225 Difference]: With dead ends: 160 [2020-10-16 10:47:17,058 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 10:47:17,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 10:47:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-16 10:47:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 10:47:17,062 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 10:47:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:17,062 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 10:47:17,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 10:47:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:17,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:17,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:17,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:17,264 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:17,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-16 10:47:17,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:17,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623836507] [2020-10-16 10:47:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623836507] [2020-10-16 10:47:17,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252053281] [2020-10-16 10:47:17,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:17,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:17,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:17,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:17,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:17,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:17,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:17,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501397982] [2020-10-16 10:47:17,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:17,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:17,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:17,509 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:17,851 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-16 10:47:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:17,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:17,853 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:17,853 INFO L226 Difference]: Without dead ends: 181 [2020-10-16 10:47:17,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-16 10:47:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-16 10:47:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 10:47:17,856 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 10:47:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:17,857 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 10:47:17,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 10:47:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:17,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:17,857 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:18,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:18,058 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:18,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-16 10:47:18,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:18,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375812464] [2020-10-16 10:47:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375812464] [2020-10-16 10:47:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133316075] [2020-10-16 10:47:18,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:18,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:18,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:18,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:18,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:18,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855805375] [2020-10-16 10:47:18,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:18,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:18,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:18,246 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:18,501 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-16 10:47:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:18,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:18,503 INFO L225 Difference]: With dead ends: 169 [2020-10-16 10:47:18,503 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 10:47:18,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 10:47:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-16 10:47:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 10:47:18,508 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 10:47:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:18,508 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 10:47:18,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 10:47:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:18,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:18,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:18,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-16 10:47:18,712 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-16 10:47:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:18,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680952853] [2020-10-16 10:47:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680952853] [2020-10-16 10:47:18,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197596947] [2020-10-16 10:47:18,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:18,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:18,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:18,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:18,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:18,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:18,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:18,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067617981] [2020-10-16 10:47:18,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:18,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:18,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:18,906 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:19,261 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-16 10:47:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:19,262 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:19,264 INFO L225 Difference]: With dead ends: 192 [2020-10-16 10:47:19,264 INFO L226 Difference]: Without dead ends: 184 [2020-10-16 10:47:19,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-16 10:47:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-16 10:47:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 10:47:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-16 10:47:19,268 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-16 10:47:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:19,268 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-16 10:47:19,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-16 10:47:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:19,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:19,269 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:19,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:19,480 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-16 10:47:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:19,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420253873] [2020-10-16 10:47:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420253873] [2020-10-16 10:47:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664003374] [2020-10-16 10:47:19,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:19,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:19,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:19,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:19,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440821148] [2020-10-16 10:47:19,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:19,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:19,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:19,726 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-16 10:47:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:20,128 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-16 10:47:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:20,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:20,130 INFO L225 Difference]: With dead ends: 180 [2020-10-16 10:47:20,130 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 10:47:20,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 10:47:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-16 10:47:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 10:47:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-16 10:47:20,134 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-16 10:47:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:20,134 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-16 10:47:20,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-16 10:47:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:20,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:20,135 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:20,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 10:47:20,336 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-16 10:47:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:20,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732404242] [2020-10-16 10:47:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732404242] [2020-10-16 10:47:20,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651945591] [2020-10-16 10:47:20,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:20,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:20,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:20,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:20,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 10:47:20,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032402972] [2020-10-16 10:47:20,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:47:20,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:20,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:47:20,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:20,581 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-16 10:47:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:20,732 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-16 10:47:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:20,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-16 10:47:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:20,734 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:20,734 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:20,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:20,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 10:47:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-16 10:47:20,737 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-16 10:47:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:20,737 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-16 10:47:20,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:47:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-16 10:47:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:20,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:20,738 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:20,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:20,939 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-16 10:47:20,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:20,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635642716] [2020-10-16 10:47:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635642716] [2020-10-16 10:47:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175228432] [2020-10-16 10:47:21,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:21,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:21,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:21,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:21,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543115588] [2020-10-16 10:47:21,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:21,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:21,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:21,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:21,227 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-16 10:47:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:21,278 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:21,279 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:21,280 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:21,280 INFO L226 Difference]: Without dead ends: 153 [2020-10-16 10:47:21,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-16 10:47:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-16 10:47:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 10:47:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 10:47:21,284 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 10:47:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:21,284 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 10:47:21,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 10:47:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:21,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:21,285 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:21,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 10:47:21,493 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-16 10:47:21,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:21,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861581148] [2020-10-16 10:47:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861581148] [2020-10-16 10:47:21,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538273522] [2020-10-16 10:47:21,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:21,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:21,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:21,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:21,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628989922] [2020-10-16 10:47:21,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:21,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:21,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:21,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:21,757 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 10:47:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:21,819 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-16 10:47:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:21,819 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:21,820 INFO L225 Difference]: With dead ends: 170 [2020-10-16 10:47:21,820 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 10:47:21,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 10:47:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-16 10:47:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 10:47:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 10:47:21,823 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 10:47:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:21,824 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 10:47:21,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 10:47:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:21,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:21,825 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:22,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:22,032 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:22,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-16 10:47:22,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:22,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067682435] [2020-10-16 10:47:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067682435] [2020-10-16 10:47:22,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539296842] [2020-10-16 10:47:22,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:22,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:22,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:22,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:22,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943482850] [2020-10-16 10:47:22,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:22,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:22,302 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 10:47:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:22,392 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-16 10:47:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:22,393 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:22,394 INFO L225 Difference]: With dead ends: 169 [2020-10-16 10:47:22,395 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 10:47:22,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 10:47:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-16 10:47:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 10:47:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-16 10:47:22,399 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-16 10:47:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:22,399 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-16 10:47:22,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-16 10:47:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:22,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:22,400 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:22,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:22,605 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-16 10:47:22,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:22,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734337979] [2020-10-16 10:47:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734337979] [2020-10-16 10:47:22,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613765545] [2020-10-16 10:47:22,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:22,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:47:22,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:22,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:22,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:22,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888108386] [2020-10-16 10:47:22,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:22,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:22,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:22,839 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-16 10:47:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:22,947 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-16 10:47:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:22,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:22,949 INFO L225 Difference]: With dead ends: 168 [2020-10-16 10:47:22,949 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 10:47:22,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 10:47:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-16 10:47:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 10:47:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-16 10:47:22,954 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-16 10:47:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:22,954 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-16 10:47:22,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-16 10:47:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:22,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:22,955 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:23,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 10:47:23,166 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:23,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-16 10:47:23,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:23,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977744630] [2020-10-16 10:47:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977744630] [2020-10-16 10:47:23,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736728928] [2020-10-16 10:47:23,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:23,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:23,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:23,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170417608] [2020-10-16 10:47:23,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:23,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:23,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:23,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:23,404 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-16 10:47:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:23,538 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-16 10:47:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:23,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:23,541 INFO L225 Difference]: With dead ends: 167 [2020-10-16 10:47:23,541 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 10:47:23,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 10:47:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-16 10:47:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 10:47:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-16 10:47:23,544 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-16 10:47:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:23,544 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-16 10:47:23,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-16 10:47:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:23,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:23,545 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:23,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:23,756 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-16 10:47:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:23,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824464453] [2020-10-16 10:47:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824464453] [2020-10-16 10:47:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496619960] [2020-10-16 10:47:23,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:23,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:23,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:23,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:23,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:23,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:23,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285658689] [2020-10-16 10:47:23,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:23,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:23,997 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-16 10:47:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:24,170 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-16 10:47:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:24,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:24,173 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:24,173 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 10:47:24,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 10:47:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-16 10:47:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 10:47:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-16 10:47:24,178 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-16 10:47:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:24,179 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-16 10:47:24,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-16 10:47:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:24,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:24,180 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:24,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:24,393 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:24,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-16 10:47:24,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:24,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637571778] [2020-10-16 10:47:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637571778] [2020-10-16 10:47:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274317720] [2020-10-16 10:47:24,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:24,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:24,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:24,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:24,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908959646] [2020-10-16 10:47:24,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:24,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:24,771 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-16 10:47:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:24,837 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-16 10:47:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:24,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:24,839 INFO L225 Difference]: With dead ends: 163 [2020-10-16 10:47:24,840 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:24,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-16 10:47:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 10:47:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-16 10:47:24,845 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-16 10:47:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:24,845 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-16 10:47:24,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-16 10:47:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:24,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:24,847 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-16 10:47:25,059 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-16 10:47:25,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713321380] [2020-10-16 10:47:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713321380] [2020-10-16 10:47:25,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345627391] [2020-10-16 10:47:25,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:25,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:25,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:25,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505538272] [2020-10-16 10:47:25,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:25,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:25,423 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:25,586 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-16 10:47:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:25,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:25,588 INFO L225 Difference]: With dead ends: 172 [2020-10-16 10:47:25,589 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 10:47:25,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 10:47:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-16 10:47:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 10:47:25,592 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 10:47:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:25,593 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 10:47:25,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 10:47:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:25,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:25,594 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:25,805 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-16 10:47:25,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195808872] [2020-10-16 10:47:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195808872] [2020-10-16 10:47:25,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634642707] [2020-10-16 10:47:25,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:25,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:25,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:27,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056928967] [2020-10-16 10:47:27,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:27,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:27,104 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 10:47:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,298 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 10:47:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:27,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,300 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:27,300 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:27,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-16 10:47:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 10:47:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-16 10:47:27,304 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-16 10:47:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,304 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-16 10:47:27,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-16 10:47:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:27,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,305 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:27,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-16 10:47:27,516 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-16 10:47:27,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:27,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939004769] [2020-10-16 10:47:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939004769] [2020-10-16 10:47:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881765536] [2020-10-16 10:47:27,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:27,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:27,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:27,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:27,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278442280] [2020-10-16 10:47:27,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:27,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:27,754 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-16 10:47:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,948 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 10:47:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:27,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,950 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:27,950 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:27,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-16 10:47:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 10:47:27,953 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 10:47:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,954 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 10:47:27,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 10:47:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:27,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,954 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:28,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 10:47:28,163 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-16 10:47:28,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:28,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16420135] [2020-10-16 10:47:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16420135] [2020-10-16 10:47:28,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869982019] [2020-10-16 10:47:28,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:28,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:28,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:28,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:28,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703971216] [2020-10-16 10:47:28,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:28,425 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 10:47:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:28,626 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-16 10:47:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:28,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:28,628 INFO L225 Difference]: With dead ends: 184 [2020-10-16 10:47:28,628 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 10:47:28,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 10:47:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-16 10:47:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-16 10:47:28,632 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-16 10:47:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:28,632 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-16 10:47:28,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-16 10:47:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:28,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:28,633 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:28,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 10:47:28,844 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-16 10:47:28,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:28,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219647482] [2020-10-16 10:47:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219647482] [2020-10-16 10:47:28,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145110918] [2020-10-16 10:47:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:29,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:29,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594156473] [2020-10-16 10:47:29,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:29,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:29,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:29,094 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-16 10:47:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,309 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-16 10:47:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:29,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,311 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:29,312 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:29,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-16 10:47:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-16 10:47:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-16 10:47:29,315 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-16 10:47:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,315 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-16 10:47:29,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-16 10:47:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:29,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,315 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:29,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:29,516 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:29,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-16 10:47:29,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:29,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72417950] [2020-10-16 10:47:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72417950] [2020-10-16 10:47:29,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743488267] [2020-10-16 10:47:29,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:29,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:29,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:29,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734545439] [2020-10-16 10:47:29,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:29,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:29,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:29,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:29,769 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-16 10:47:29,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,939 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-16 10:47:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:29,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,942 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:29,942 INFO L226 Difference]: Without dead ends: 174 [2020-10-16 10:47:29,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-16 10:47:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-16 10:47:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:47:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-16 10:47:29,945 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-16 10:47:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,945 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-16 10:47:29,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-16 10:47:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:29,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,946 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:30,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:30,147 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:30,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-16 10:47:30,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:30,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330149995] [2020-10-16 10:47:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330149995] [2020-10-16 10:47:30,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122612816] [2020-10-16 10:47:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:30,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:30,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:30,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:30,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:30,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444058493] [2020-10-16 10:47:30,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:30,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:30,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:30,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:30,414 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:30,646 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 10:47:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:30,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:30,648 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:30,648 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:30,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-16 10:47:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-16 10:47:30,652 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-16 10:47:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:30,652 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-16 10:47:30,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-16 10:47:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:30,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:30,653 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:30,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:30,861 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-16 10:47:30,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:30,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952224628] [2020-10-16 10:47:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952224628] [2020-10-16 10:47:30,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789150380] [2020-10-16 10:47:30,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:31,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:31,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:31,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:31,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:31,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798844158] [2020-10-16 10:47:31,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:31,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:31,172 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-16 10:47:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:31,360 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 10:47:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:31,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:31,361 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:31,362 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:31,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:31,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-16 10:47:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 10:47:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-16 10:47:31,366 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-16 10:47:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:31,366 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-16 10:47:31,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-16 10:47:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:31,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:31,367 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:31,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:31,577 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-16 10:47:31,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:31,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892635673] [2020-10-16 10:47:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892635673] [2020-10-16 10:47:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837470468] [2020-10-16 10:47:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:31,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:31,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:31,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:31,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:31,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387292230] [2020-10-16 10:47:31,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:31,868 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-16 10:47:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:31,938 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-16 10:47:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:31,938 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:31,940 INFO L225 Difference]: With dead ends: 182 [2020-10-16 10:47:31,940 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 10:47:31,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 10:47:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-16 10:47:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:47:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-16 10:47:31,944 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-16 10:47:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:31,944 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-16 10:47:31,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-16 10:47:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:31,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:31,946 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:32,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-16 10:47:32,158 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-16 10:47:32,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:32,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077408234] [2020-10-16 10:47:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077408234] [2020-10-16 10:47:32,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137235735] [2020-10-16 10:47:32,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:32,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:32,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:32,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:32,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576238821] [2020-10-16 10:47:32,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:32,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:32,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:32,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:32,454 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-16 10:47:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:32,630 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-16 10:47:32,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:32,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:32,632 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:32,632 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:32,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-16 10:47:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 10:47:32,637 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 10:47:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:32,638 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 10:47:32,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 10:47:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:32,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:32,638 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:32,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:32,839 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:32,840 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-16 10:47:32,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:32,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309930487] [2020-10-16 10:47:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309930487] [2020-10-16 10:47:32,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130739288] [2020-10-16 10:47:32,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:33,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:33,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656905686] [2020-10-16 10:47:33,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:33,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:33,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:33,152 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:33,388 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-16 10:47:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:33,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:33,391 INFO L225 Difference]: With dead ends: 191 [2020-10-16 10:47:33,391 INFO L226 Difference]: Without dead ends: 189 [2020-10-16 10:47:33,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-16 10:47:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-16 10:47:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-16 10:47:33,394 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-16 10:47:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:33,394 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-16 10:47:33,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-16 10:47:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:33,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:33,395 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:33,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:33,596 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:33,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:33,596 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-16 10:47:33,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:33,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347078817] [2020-10-16 10:47:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347078817] [2020-10-16 10:47:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338973561] [2020-10-16 10:47:33,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:33,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:33,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:33,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:33,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:33,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:33,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504192658] [2020-10-16 10:47:33,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:33,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:33,846 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-16 10:47:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:34,099 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-16 10:47:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:34,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:34,101 INFO L225 Difference]: With dead ends: 187 [2020-10-16 10:47:34,101 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 10:47:34,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 10:47:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-16 10:47:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 10:47:34,106 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 10:47:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:34,106 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 10:47:34,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 10:47:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:34,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:34,107 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:34,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-16 10:47:34,318 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-16 10:47:34,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:34,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423364071] [2020-10-16 10:47:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423364071] [2020-10-16 10:47:34,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876148805] [2020-10-16 10:47:34,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:34,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:34,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:34,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:34,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:34,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133111448] [2020-10-16 10:47:34,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:34,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:34,555 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:34,822 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-16 10:47:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:34,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:34,824 INFO L225 Difference]: With dead ends: 198 [2020-10-16 10:47:34,825 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 10:47:34,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 10:47:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-16 10:47:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-16 10:47:34,829 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-16 10:47:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:34,829 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-16 10:47:34,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-16 10:47:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:34,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:34,830 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:35,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:35,031 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:35,032 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-16 10:47:35,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:35,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967381075] [2020-10-16 10:47:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967381075] [2020-10-16 10:47:35,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413507453] [2020-10-16 10:47:35,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:35,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:35,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:35,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:35,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727349061] [2020-10-16 10:47:35,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:35,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:35,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:35,291 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-16 10:47:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:35,586 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-16 10:47:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:35,586 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:35,588 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:35,588 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 10:47:35,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 10:47:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-16 10:47:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:47:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-16 10:47:35,592 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-16 10:47:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:35,592 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-16 10:47:35,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-16 10:47:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:35,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:35,593 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:35,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 10:47:35,793 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-16 10:47:35,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:35,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127152074] [2020-10-16 10:47:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127152074] [2020-10-16 10:47:35,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770797973] [2020-10-16 10:47:35,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:35,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:36,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:36,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221015512] [2020-10-16 10:47:36,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:36,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:36,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:36,066 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-16 10:47:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:36,164 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-16 10:47:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:36,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:36,166 INFO L225 Difference]: With dead ends: 178 [2020-10-16 10:47:36,166 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 10:47:36,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 10:47:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-16 10:47:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-16 10:47:36,170 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-16 10:47:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:36,170 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-16 10:47:36,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-16 10:47:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:36,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:36,171 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:36,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:36,371 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:36,372 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-16 10:47:36,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:36,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758958167] [2020-10-16 10:47:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758958167] [2020-10-16 10:47:36,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772034807] [2020-10-16 10:47:36,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:36,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:36,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:36,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:36,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:36,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690220467] [2020-10-16 10:47:36,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:36,627 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-16 10:47:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:36,828 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-16 10:47:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:36,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:36,830 INFO L225 Difference]: With dead ends: 193 [2020-10-16 10:47:36,830 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 10:47:36,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 10:47:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-16 10:47:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-16 10:47:36,837 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-16 10:47:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:36,837 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-16 10:47:36,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-16 10:47:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:36,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:36,838 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:37,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-16 10:47:37,041 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:37,041 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-16 10:47:37,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:37,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990543029] [2020-10-16 10:47:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990543029] [2020-10-16 10:47:37,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437076690] [2020-10-16 10:47:37,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:37,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:37,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565543147] [2020-10-16 10:47:37,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:37,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:37,308 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-16 10:47:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:37,585 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 10:47:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:37,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:37,587 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:47:37,587 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 10:47:37,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 10:47:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-16 10:47:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-16 10:47:37,591 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-16 10:47:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:37,591 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-16 10:47:37,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-16 10:47:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:37,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:37,592 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:37,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:37,792 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-16 10:47:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:37,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951781854] [2020-10-16 10:47:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951781854] [2020-10-16 10:47:37,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443397002] [2020-10-16 10:47:37,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:37,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:38,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:38,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138990068] [2020-10-16 10:47:38,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:38,106 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-16 10:47:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:38,224 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-16 10:47:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:38,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:38,226 INFO L225 Difference]: With dead ends: 174 [2020-10-16 10:47:38,227 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 10:47:38,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 10:47:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-16 10:47:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-16 10:47:38,230 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-16 10:47:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:38,230 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-16 10:47:38,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-16 10:47:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:38,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:38,231 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:38,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 10:47:38,432 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:38,432 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-16 10:47:38,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:38,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080170] [2020-10-16 10:47:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:38,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080170] [2020-10-16 10:47:38,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626034529] [2020-10-16 10:47:38,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:38,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:38,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:38,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:38,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:38,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:38,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121585487] [2020-10-16 10:47:38,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:38,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:38,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:38,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:38,680 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-16 10:47:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:38,928 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-16 10:47:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:38,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:38,930 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:38,930 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 10:47:38,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 10:47:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-16 10:47:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-16 10:47:38,935 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-16 10:47:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:38,935 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-16 10:47:38,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-16 10:47:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:38,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:38,936 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:39,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:39,137 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-16 10:47:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:39,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138163931] [2020-10-16 10:47:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138163931] [2020-10-16 10:47:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206684868] [2020-10-16 10:47:39,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:39,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:39,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:39,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:39,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:39,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454048270] [2020-10-16 10:47:39,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:39,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:39,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:39,375 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-16 10:47:39,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:39,513 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-16 10:47:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:39,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:39,515 INFO L225 Difference]: With dead ends: 175 [2020-10-16 10:47:39,515 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 10:47:39,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 10:47:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-16 10:47:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:39,518 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:39,518 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:39,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:39,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:39,519 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:39,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:39,720 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-16 10:47:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:39,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186011557] [2020-10-16 10:47:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186011557] [2020-10-16 10:47:39,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901458627] [2020-10-16 10:47:39,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:39,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:39,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:39,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:39,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:39,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109702918] [2020-10-16 10:47:39,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:39,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:39,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:39,988 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:40,341 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-16 10:47:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:40,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:40,343 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:47:40,343 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 10:47:40,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 10:47:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-16 10:47:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 10:47:40,347 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 10:47:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:40,347 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 10:47:40,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 10:47:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:40,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:40,348 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:40,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:40,560 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-16 10:47:40,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:40,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436240275] [2020-10-16 10:47:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:40,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436240275] [2020-10-16 10:47:40,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300395921] [2020-10-16 10:47:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:40,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:40,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:40,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:40,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:40,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:40,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525992973] [2020-10-16 10:47:40,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:40,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:40,817 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:41,085 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-16 10:47:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:41,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:41,087 INFO L225 Difference]: With dead ends: 187 [2020-10-16 10:47:41,087 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 10:47:41,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 10:47:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-16 10:47:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:41,090 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:41,090 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:41,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:41,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:41,091 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:41,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:41,292 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:41,292 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-16 10:47:41,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:41,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932099112] [2020-10-16 10:47:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:41,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932099112] [2020-10-16 10:47:41,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312259535] [2020-10-16 10:47:41,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:41,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:41,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:41,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:41,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:41,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533493919] [2020-10-16 10:47:41,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:41,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:41,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:41,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:41,548 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:41,993 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-16 10:47:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:41,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:41,995 INFO L225 Difference]: With dead ends: 212 [2020-10-16 10:47:41,995 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:47:41,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:47:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:47:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 10:47:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:41,999 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:42,000 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:42,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:42,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:42,000 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:42,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 10:47:42,201 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-16 10:47:42,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:42,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978725499] [2020-10-16 10:47:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:42,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978725499] [2020-10-16 10:47:42,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403597439] [2020-10-16 10:47:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:42,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:42,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:42,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:42,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:42,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:42,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973782672] [2020-10-16 10:47:42,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:42,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:42,435 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:42,772 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 10:47:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:42,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:42,775 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:47:42,775 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 10:47:42,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 10:47:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-16 10:47:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-16 10:47:42,778 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-16 10:47:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:42,778 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-16 10:47:42,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-16 10:47:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:42,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:42,779 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:42,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:42,979 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-16 10:47:42,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:42,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246307813] [2020-10-16 10:47:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:43,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246307813] [2020-10-16 10:47:43,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639751592] [2020-10-16 10:47:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:43,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:43,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:43,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:43,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:43,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:43,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272166029] [2020-10-16 10:47:43,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:43,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:43,772 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-16 10:47:44,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:44,062 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-16 10:47:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:44,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:44,064 INFO L225 Difference]: With dead ends: 198 [2020-10-16 10:47:44,064 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 10:47:44,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 10:47:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-16 10:47:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 10:47:44,069 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 10:47:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:44,069 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 10:47:44,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 10:47:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:44,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:44,070 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:44,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 10:47:44,280 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:44,280 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-16 10:47:44,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:44,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33334723] [2020-10-16 10:47:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:44,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33334723] [2020-10-16 10:47:44,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063933771] [2020-10-16 10:47:44,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:44,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:45,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:45,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:45,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056020540] [2020-10-16 10:47:45,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:45,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:45,055 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:45,464 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-16 10:47:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:47:45,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:45,465 INFO L225 Difference]: With dead ends: 209 [2020-10-16 10:47:45,466 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:47:45,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:47:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 10:47:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:45,469 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:45,469 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:45,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:45,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:45,470 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:45,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 10:47:45,671 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:45,671 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-16 10:47:45,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:45,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354846343] [2020-10-16 10:47:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:45,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354846343] [2020-10-16 10:47:45,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381766279] [2020-10-16 10:47:45,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:45,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:45,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:45,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:45,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:45,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:45,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58674162] [2020-10-16 10:47:45,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:45,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:45,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:45,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:45,943 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:46,528 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-16 10:47:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:46,528 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:46,530 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:47:46,530 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 10:47:46,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:47:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 10:47:46,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-16 10:47:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 10:47:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-16 10:47:46,534 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-16 10:47:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:46,535 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-16 10:47:46,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-16 10:47:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:46,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:46,535 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:46,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 10:47:46,742 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:46,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-16 10:47:46,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:46,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190813276] [2020-10-16 10:47:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:46,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190813276] [2020-10-16 10:47:46,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673356544] [2020-10-16 10:47:46,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:46,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:49,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:49,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:49,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:49,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73943269] [2020-10-16 10:47:49,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:49,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:49,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:49,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-16 10:47:49,087 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-16 10:47:53,416 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 10:47:57,651 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-16 10:47:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:58,102 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-16 10:47:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:47:58,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:58,104 INFO L225 Difference]: With dead ends: 236 [2020-10-16 10:47:58,104 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 10:47:58,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-16 10:47:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 10:47:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-16 10:47:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-16 10:47:58,108 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-16 10:47:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:58,108 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-16 10:47:58,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-16 10:47:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:58,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:58,109 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:58,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 10:47:58,310 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:58,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:58,310 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-16 10:47:58,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:58,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130687582] [2020-10-16 10:47:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:58,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130687582] [2020-10-16 10:47:58,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002088466] [2020-10-16 10:47:58,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:58,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:58,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:58,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:58,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:58,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327177400] [2020-10-16 10:47:58,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:58,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:58,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:58,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:58,608 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-16 10:47:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:59,177 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-16 10:47:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:59,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:59,179 INFO L225 Difference]: With dead ends: 219 [2020-10-16 10:47:59,179 INFO L226 Difference]: Without dead ends: 214 [2020-10-16 10:47:59,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:47:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-16 10:47:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-16 10:47:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-16 10:47:59,183 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-16 10:47:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:59,183 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-16 10:47:59,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-16 10:47:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:59,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:59,184 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:59,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:59,385 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-16 10:47:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:59,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367636772] [2020-10-16 10:47:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367636772] [2020-10-16 10:47:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197444315] [2020-10-16 10:47:59,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:59,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:59,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:59,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:59,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:59,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:59,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245153728] [2020-10-16 10:47:59,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:59,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:59,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:59,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:59,642 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-16 10:47:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:59,905 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-16 10:47:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:59,905 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:59,906 INFO L225 Difference]: With dead ends: 197 [2020-10-16 10:47:59,906 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 10:47:59,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 10:47:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-16 10:47:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-16 10:47:59,910 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-16 10:47:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:59,910 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-16 10:47:59,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-16 10:47:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:59,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:59,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:00,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:00,116 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-16 10:48:00,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:00,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633265834] [2020-10-16 10:48:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633265834] [2020-10-16 10:48:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251923991] [2020-10-16 10:48:00,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:00,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:48:00,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:00,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:00,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:00,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:00,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063933413] [2020-10-16 10:48:00,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:00,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:00,373 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-16 10:48:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:00,653 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-16 10:48:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:00,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:00,654 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:48:00,654 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 10:48:00,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 10:48:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-16 10:48:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:48:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-16 10:48:00,658 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-16 10:48:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:00,658 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-16 10:48:00,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-16 10:48:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:00,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:00,659 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:00,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 10:48:00,859 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:00,860 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-16 10:48:00,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:00,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399328710] [2020-10-16 10:48:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:00,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399328710] [2020-10-16 10:48:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547583487] [2020-10-16 10:48:00,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:00,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:00,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:01,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:01,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024705069] [2020-10-16 10:48:01,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:01,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:01,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:01,118 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-16 10:48:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:01,405 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-16 10:48:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:01,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:01,406 INFO L225 Difference]: With dead ends: 197 [2020-10-16 10:48:01,407 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 10:48:01,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 10:48:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-16 10:48:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-16 10:48:01,410 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-16 10:48:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:01,410 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-16 10:48:01,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-16 10:48:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:01,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:01,410 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:01,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 10:48:01,611 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:01,612 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-16 10:48:01,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:01,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148469039] [2020-10-16 10:48:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148469039] [2020-10-16 10:48:01,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102929877] [2020-10-16 10:48:01,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:01,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:01,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:01,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:01,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867898373] [2020-10-16 10:48:01,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:01,893 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-16 10:48:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:02,497 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-16 10:48:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:48:02,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:02,500 INFO L225 Difference]: With dead ends: 214 [2020-10-16 10:48:02,500 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 10:48:02,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 10:48:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-16 10:48:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:48:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-16 10:48:02,506 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-16 10:48:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:02,506 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-16 10:48:02,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-16 10:48:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:02,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:02,508 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:02,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 10:48:02,719 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-16 10:48:02,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:02,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103087609] [2020-10-16 10:48:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:02,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103087609] [2020-10-16 10:48:02,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161738835] [2020-10-16 10:48:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:02,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:48:02,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:02,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:03,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:03,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131469845] [2020-10-16 10:48:03,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:03,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:03,026 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-16 10:48:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:03,418 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-16 10:48:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:48:03,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:03,420 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:48:03,420 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 10:48:03,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:48:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 10:48:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-16 10:48:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:48:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 10:48:03,424 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 10:48:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:03,424 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 10:48:03,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 10:48:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:03,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:03,425 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:03,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:03,626 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:03,626 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-16 10:48:03,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:03,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56452939] [2020-10-16 10:48:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:03,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56452939] [2020-10-16 10:48:03,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031508401] [2020-10-16 10:48:03,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:03,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:03,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:03,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311065116] [2020-10-16 10:48:03,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:03,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:03,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:03,865 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:04,289 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-16 10:48:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:48:04,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:04,293 INFO L225 Difference]: With dead ends: 211 [2020-10-16 10:48:04,293 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 10:48:04,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 10:48:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-16 10:48:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:04,296 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:04,296 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:04,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:04,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:04,297 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:04,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:04,498 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-16 10:48:04,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:04,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225549820] [2020-10-16 10:48:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:04,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225549820] [2020-10-16 10:48:04,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257187131] [2020-10-16 10:48:04,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:04,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:04,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:04,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:04,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305364918] [2020-10-16 10:48:04,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:04,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:04,737 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:05,233 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-16 10:48:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:48:05,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:05,234 INFO L225 Difference]: With dead ends: 211 [2020-10-16 10:48:05,234 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 10:48:05,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:48:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 10:48:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-16 10:48:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:05,238 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:05,239 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:05,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:05,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:05,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:05,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 10:48:05,440 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-16 10:48:05,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:05,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744506058] [2020-10-16 10:48:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:05,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744506058] [2020-10-16 10:48:05,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370447354] [2020-10-16 10:48:05,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:05,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:48:05,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:05,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:05,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:05,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:05,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097988186] [2020-10-16 10:48:05,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:05,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:05,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:05,710 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:06,329 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-16 10:48:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:48:06,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:06,330 INFO L225 Difference]: With dead ends: 227 [2020-10-16 10:48:06,330 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 10:48:06,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:48:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 10:48:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-16 10:48:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:48:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 10:48:06,334 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 10:48:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:06,334 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 10:48:06,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 10:48:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:06,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:06,335 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:06,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 10:48:06,539 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-16 10:48:06,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:06,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406884525] [2020-10-16 10:48:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:06,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406884525] [2020-10-16 10:48:06,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474769307] [2020-10-16 10:48:06,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:06,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:06,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:06,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:06,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:06,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107585986] [2020-10-16 10:48:06,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:06,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:06,785 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:07,270 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-16 10:48:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:48:07,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:07,271 INFO L225 Difference]: With dead ends: 221 [2020-10-16 10:48:07,272 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 10:48:07,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:48:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 10:48:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-16 10:48:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:07,275 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:07,275 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:07,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:07,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:07,276 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:07,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:07,476 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-16 10:48:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:07,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373871574] [2020-10-16 10:48:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:07,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373871574] [2020-10-16 10:48:07,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309695219] [2020-10-16 10:48:07,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:07,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:07,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:07,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:07,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:07,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:07,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:07,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52499967] [2020-10-16 10:48:07,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:07,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:07,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:07,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:07,718 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:08,322 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-16 10:48:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:08,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:08,323 INFO L225 Difference]: With dead ends: 240 [2020-10-16 10:48:08,323 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 10:48:08,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 10:48:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-16 10:48:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 10:48:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-16 10:48:08,327 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-16 10:48:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:08,327 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-16 10:48:08,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-16 10:48:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:08,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:08,327 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:08,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 10:48:08,528 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-16 10:48:08,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:08,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853532814] [2020-10-16 10:48:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:08,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853532814] [2020-10-16 10:48:08,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154324529] [2020-10-16 10:48:08,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:08,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:48:08,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:08,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:08,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:08,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:08,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:08,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900148573] [2020-10-16 10:48:08,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:08,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:08,826 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-16 10:48:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:09,491 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-16 10:48:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:09,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:09,493 INFO L225 Difference]: With dead ends: 238 [2020-10-16 10:48:09,493 INFO L226 Difference]: Without dead ends: 230 [2020-10-16 10:48:09,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-16 10:48:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-16 10:48:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 10:48:09,499 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 10:48:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:09,500 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 10:48:09,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 10:48:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:09,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:09,500 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:09,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:09,711 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-16 10:48:09,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:09,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162451643] [2020-10-16 10:48:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:09,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162451643] [2020-10-16 10:48:09,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530567236] [2020-10-16 10:48:09,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:09,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:09,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:09,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977004156] [2020-10-16 10:48:09,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:09,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:09,967 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 10:48:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:10,237 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-16 10:48:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:48:10,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:10,239 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:48:10,239 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 10:48:10,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 10:48:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-16 10:48:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 10:48:10,243 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 10:48:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:10,243 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 10:48:10,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 10:48:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:10,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:10,244 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:10,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-16 10:48:10,446 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-16 10:48:10,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:10,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867125918] [2020-10-16 10:48:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:10,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867125918] [2020-10-16 10:48:10,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185171420] [2020-10-16 10:48:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:10,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:10,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:10,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:10,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:10,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:10,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165807225] [2020-10-16 10:48:10,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:10,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:10,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:10,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:10,708 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 10:48:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:11,200 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-16 10:48:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:48:11,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:11,201 INFO L225 Difference]: With dead ends: 206 [2020-10-16 10:48:11,202 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 10:48:11,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 10:48:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-16 10:48:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:48:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-16 10:48:11,205 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-16 10:48:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:11,205 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-16 10:48:11,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-16 10:48:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:11,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:11,206 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:11,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:11,407 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:11,407 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-16 10:48:11,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:11,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313132063] [2020-10-16 10:48:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:11,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313132063] [2020-10-16 10:48:11,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926784672] [2020-10-16 10:48:11,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:11,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:48:11,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:11,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:11,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:13,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:13,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 10:48:13,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870309753] [2020-10-16 10:48:13,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:48:13,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:48:13,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-16 10:48:13,746 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-16 10:48:16,173 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-16 10:48:36,217 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-16 10:49:03,774 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-16 10:49:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:26,535 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-10-16 10:49:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:49:26,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 10:49:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:26,536 INFO L225 Difference]: With dead ends: 252 [2020-10-16 10:49:26,536 INFO L226 Difference]: Without dead ends: 247 [2020-10-16 10:49:26,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-16 10:49:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-16 10:49:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-10-16 10:49:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:49:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-16 10:49:26,541 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-16 10:49:26,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:26,541 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-16 10:49:26,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:49:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-16 10:49:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:26,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:26,542 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:26,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-16 10:49:26,752 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-16 10:49:26,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:26,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874070545] [2020-10-16 10:49:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:26,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874070545] [2020-10-16 10:49:26,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895102884] [2020-10-16 10:49:26,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:26,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:26,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:27,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:27,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305108232] [2020-10-16 10:49:27,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:27,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:27,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:27,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:27,017 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-16 10:49:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:27,234 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 10:49:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:27,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:27,237 INFO L225 Difference]: With dead ends: 194 [2020-10-16 10:49:27,237 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 10:49:27,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:49:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 10:49:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-16 10:49:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:49:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-16 10:49:27,240 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-16 10:49:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:27,240 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-16 10:49:27,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-16 10:49:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:27,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:27,241 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:27,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:27,441 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-16 10:49:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:27,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760637261] [2020-10-16 10:49:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:27,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760637261] [2020-10-16 10:49:27,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608384366] [2020-10-16 10:49:27,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:27,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:27,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:27,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:27,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:27,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:27,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:27,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020185224] [2020-10-16 10:49:27,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:27,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:27,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:27,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:27,714 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-16 10:49:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:28,032 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-16 10:49:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:49:28,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:28,033 INFO L225 Difference]: With dead ends: 205 [2020-10-16 10:49:28,033 INFO L226 Difference]: Without dead ends: 203 [2020-10-16 10:49:28,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:49:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-16 10:49:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-16 10:49:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:49:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-16 10:49:28,037 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-16 10:49:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:28,037 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-16 10:49:28,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-16 10:49:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:28,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:28,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:28,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:28,242 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-16 10:49:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:28,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885101949] [2020-10-16 10:49:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:28,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885101949] [2020-10-16 10:49:28,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101342453] [2020-10-16 10:49:28,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:28,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:28,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:28,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:28,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:28,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:28,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:28,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414761367] [2020-10-16 10:49:28,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:28,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:28,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:28,520 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-16 10:49:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:28,790 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 10:49:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:49:28,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:28,792 INFO L225 Difference]: With dead ends: 201 [2020-10-16 10:49:28,792 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 10:49:28,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:49:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 10:49:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-16 10:49:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:49:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-16 10:49:28,795 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-16 10:49:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:28,795 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-16 10:49:28,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-16 10:49:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:28,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:28,796 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:28,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:28,997 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-16 10:49:28,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:28,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661953062] [2020-10-16 10:49:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:29,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661953062] [2020-10-16 10:49:29,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288434171] [2020-10-16 10:49:29,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:29,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:29,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:29,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:29,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424237344] [2020-10-16 10:49:29,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:29,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:29,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:29,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:29,274 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-16 10:49:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:29,559 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 10:49:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:29,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:29,562 INFO L225 Difference]: With dead ends: 194 [2020-10-16 10:49:29,562 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 10:49:29,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:49:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 10:49:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-16 10:49:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:49:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-16 10:49:29,567 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-16 10:49:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:29,568 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-16 10:49:29,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-16 10:49:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:29,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:29,569 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:29,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 10:49:29,770 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:29,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-16 10:49:29,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:29,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794858977] [2020-10-16 10:49:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:29,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794858977] [2020-10-16 10:49:29,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419118649] [2020-10-16 10:49:29,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:29,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:29,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:29,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:30,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:30,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:30,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170808391] [2020-10-16 10:49:30,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:30,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:30,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:30,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:30,034 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-16 10:49:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:30,402 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-16 10:49:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:49:30,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:30,404 INFO L225 Difference]: With dead ends: 209 [2020-10-16 10:49:30,404 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:49:30,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:49:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:49:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-16 10:49:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:49:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-16 10:49:30,408 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-16 10:49:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:30,408 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-16 10:49:30,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-16 10:49:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:30,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:30,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:30,618 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-16 10:49:30,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:30,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24684893] [2020-10-16 10:49:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24684893] [2020-10-16 10:49:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355973814] [2020-10-16 10:49:30,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:30,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:30,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:30,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:30,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:30,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794926940] [2020-10-16 10:49:30,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:30,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:30,894 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-16 10:49:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:31,233 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-16 10:49:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:49:31,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:31,235 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:49:31,235 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 10:49:31,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 10:49:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-16 10:49:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:49:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 10:49:31,238 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 10:49:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:31,238 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 10:49:31,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 10:49:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:31,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:31,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:31,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 10:49:31,440 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-16 10:49:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:31,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597588519] [2020-10-16 10:49:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597588519] [2020-10-16 10:49:31,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878599524] [2020-10-16 10:49:31,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:31,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:31,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:31,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:31,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133597326] [2020-10-16 10:49:31,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:31,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:31,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:31,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:31,705 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-16 10:49:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:32,029 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 10:49:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:32,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:32,030 INFO L225 Difference]: With dead ends: 201 [2020-10-16 10:49:32,031 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 10:49:32,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 10:49:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-16 10:49:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:49:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-16 10:49:32,034 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-16 10:49:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:32,035 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-16 10:49:32,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-16 10:49:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:32,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:32,035 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:32,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 10:49:32,236 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-16 10:49:32,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:32,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029025371] [2020-10-16 10:49:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:32,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029025371] [2020-10-16 10:49:32,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990537165] [2020-10-16 10:49:32,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:32,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:32,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:32,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:32,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:32,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:32,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:32,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985618408] [2020-10-16 10:49:32,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:32,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:32,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:32,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:32,506 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-16 10:49:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:32,962 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-16 10:49:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:49:32,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:32,963 INFO L225 Difference]: With dead ends: 215 [2020-10-16 10:49:32,964 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 10:49:32,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:49:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 10:49:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-16 10:49:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:49:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 10:49:32,968 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 10:49:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:32,968 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 10:49:32,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 10:49:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:32,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:32,969 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:33,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:33,171 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-16 10:49:33,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:33,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795545837] [2020-10-16 10:49:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:33,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795545837] [2020-10-16 10:49:33,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054056735] [2020-10-16 10:49:33,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:33,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:33,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:33,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:33,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:33,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:33,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:33,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898099320] [2020-10-16 10:49:33,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:33,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:33,431 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 10:49:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:33,825 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-16 10:49:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:33,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:33,826 INFO L225 Difference]: With dead ends: 196 [2020-10-16 10:49:33,826 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 10:49:33,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 10:49:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-16 10:49:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:49:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:49:33,831 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:49:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:33,831 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:49:33,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:49:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:33,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:33,832 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:34,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:34,037 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-16 10:49:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:34,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264186349] [2020-10-16 10:49:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:34,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264186349] [2020-10-16 10:49:34,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33621107] [2020-10-16 10:49:34,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:34,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:34,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:34,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:34,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327424781] [2020-10-16 10:49:34,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:34,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:34,279 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:49:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:34,582 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-16 10:49:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:34,582 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:34,583 INFO L225 Difference]: With dead ends: 191 [2020-10-16 10:49:34,583 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 10:49:34,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 10:49:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-16 10:49:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:49:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:49:34,587 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:49:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:34,587 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:49:34,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:49:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:34,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:34,588 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:34,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 10:49:34,789 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-16 10:49:34,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:34,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197753122] [2020-10-16 10:49:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:34,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197753122] [2020-10-16 10:49:34,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750523844] [2020-10-16 10:49:34,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:34,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:34,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:34,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:35,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:35,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:35,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:35,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474115206] [2020-10-16 10:49:35,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:35,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:35,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:35,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:35,080 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:49:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:35,657 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-16 10:49:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:49:35,657 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:35,658 INFO L225 Difference]: With dead ends: 232 [2020-10-16 10:49:35,658 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 10:49:35,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:49:35,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 10:49:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-16 10:49:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:49:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 10:49:35,661 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 10:49:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:35,661 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 10:49:35,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 10:49:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:35,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:35,662 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:35,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:35,863 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-16 10:49:35,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:35,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441579753] [2020-10-16 10:49:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:35,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441579753] [2020-10-16 10:49:35,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797394556] [2020-10-16 10:49:35,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:35,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:35,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:35,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:36,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:36,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:36,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221067926] [2020-10-16 10:49:36,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:36,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:36,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:36,150 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 10:49:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:36,712 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-16 10:49:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:49:36,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:36,713 INFO L225 Difference]: With dead ends: 222 [2020-10-16 10:49:36,713 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 10:49:36,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:49:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 10:49:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-16 10:49:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:49:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:49:36,716 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:49:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:36,716 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:49:36,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:49:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:36,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:36,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:36,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:36,918 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:36,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-16 10:49:36,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:36,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323501931] [2020-10-16 10:49:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323501931] [2020-10-16 10:49:37,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049388964] [2020-10-16 10:49:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:37,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:37,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:37,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:37,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495953411] [2020-10-16 10:49:37,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:37,205 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:49:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:38,013 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-16 10:49:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:38,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:38,015 INFO L225 Difference]: With dead ends: 254 [2020-10-16 10:49:38,016 INFO L226 Difference]: Without dead ends: 246 [2020-10-16 10:49:38,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:49:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-16 10:49:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-16 10:49:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 10:49:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-16 10:49:38,020 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-16 10:49:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:38,021 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-16 10:49:38,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-16 10:49:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:38,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:38,021 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:38,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:38,233 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-16 10:49:38,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:38,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738887600] [2020-10-16 10:49:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:38,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738887600] [2020-10-16 10:49:38,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873145765] [2020-10-16 10:49:38,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:38,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:38,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:38,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:38,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:38,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:38,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39685404] [2020-10-16 10:49:38,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:38,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:38,498 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-16 10:49:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:39,308 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-16 10:49:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:39,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:39,310 INFO L225 Difference]: With dead ends: 246 [2020-10-16 10:49:39,310 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 10:49:39,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:49:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 10:49:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-16 10:49:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:49:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-16 10:49:39,314 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-16 10:49:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:39,314 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-16 10:49:39,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-16 10:49:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:39,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:39,315 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:39,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-16 10:49:39,526 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-16 10:49:39,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:39,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355449506] [2020-10-16 10:49:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:39,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355449506] [2020-10-16 10:49:39,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743717644] [2020-10-16 10:49:39,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:39,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:39,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:39,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:39,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:39,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:39,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:39,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375598066] [2020-10-16 10:49:39,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:39,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:39,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:39,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:39,812 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-16 10:49:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:40,222 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-16 10:49:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:49:40,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:40,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:40,223 INFO L225 Difference]: With dead ends: 208 [2020-10-16 10:49:40,223 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 10:49:40,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 10:49:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-16 10:49:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:49:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-16 10:49:40,227 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-16 10:49:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:40,227 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-16 10:49:40,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-16 10:49:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:40,228 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:40,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 10:49:40,428 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-16 10:49:40,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:40,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944012563] [2020-10-16 10:49:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:40,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944012563] [2020-10-16 10:49:40,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685837044] [2020-10-16 10:49:40,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:40,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:40,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:40,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:40,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595729904] [2020-10-16 10:49:40,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:40,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:40,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:40,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:40,694 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-16 10:49:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:41,247 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-16 10:49:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:49:41,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:41,248 INFO L225 Difference]: With dead ends: 215 [2020-10-16 10:49:41,248 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 10:49:41,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:49:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 10:49:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-16 10:49:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:49:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 10:49:41,253 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 10:49:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:41,253 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 10:49:41,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 10:49:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:41,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:41,253 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:41,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 10:49:41,454 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-16 10:49:41,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:41,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810817312] [2020-10-16 10:49:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:41,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810817312] [2020-10-16 10:49:41,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424107019] [2020-10-16 10:49:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:41,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:41,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:41,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:41,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:41,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:41,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:41,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:41,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529357457] [2020-10-16 10:49:41,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:41,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:41,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:41,703 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 10:49:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:42,311 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-16 10:49:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:42,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:42,313 INFO L225 Difference]: With dead ends: 236 [2020-10-16 10:49:42,313 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 10:49:42,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:49:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 10:49:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-16 10:49:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:49:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 10:49:42,316 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 10:49:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:42,316 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 10:49:42,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 10:49:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:42,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:42,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:42,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 10:49:42,517 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:42,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:42,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-16 10:49:42,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:42,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332757314] [2020-10-16 10:49:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:42,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332757314] [2020-10-16 10:49:42,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290061814] [2020-10-16 10:49:42,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:42,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:42,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:42,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:42,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:42,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575791332] [2020-10-16 10:49:42,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:42,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:42,773 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 10:49:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:43,429 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-16 10:49:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:49:43,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:43,431 INFO L225 Difference]: With dead ends: 241 [2020-10-16 10:49:43,431 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 10:49:43,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:49:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 10:49:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-16 10:49:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-16 10:49:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-16 10:49:43,434 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-16 10:49:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:43,435 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-16 10:49:43,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-16 10:49:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:43,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:43,435 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:43,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 10:49:43,644 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:43,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-16 10:49:43,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:43,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074619900] [2020-10-16 10:49:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074619900] [2020-10-16 10:49:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10835436] [2020-10-16 10:49:43,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:43,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:43,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:49:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:43,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:43,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:43,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:49:43,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138692859] [2020-10-16 10:49:43,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:49:43,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:43,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:49:43,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:49:43,901 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-16 10:49:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:44,537 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-16 10:49:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:49:44,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:49:44,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:44,539 INFO L225 Difference]: With dead ends: 232 [2020-10-16 10:49:44,540 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 10:49:44,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:49:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 10:49:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-16 10:49:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 10:49:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-16 10:49:44,543 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-16 10:49:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:44,544 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-16 10:49:44,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:49:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-16 10:49:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:44,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:44,544 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:44,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:44,745 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-16 10:49:44,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:44,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389359520] [2020-10-16 10:49:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389359520] [2020-10-16 10:49:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976040693] [2020-10-16 10:49:44,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:44,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:49:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:49:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:45,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 10:49:45,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-16 10:49:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411230702] [2020-10-16 10:49:45,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:49:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:45,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:49:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:49:45,024 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-10-16 10:49:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:45,052 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-10-16 10:49:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:49:45,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-16 10:49:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:45,053 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:49:45,054 INFO L226 Difference]: Without dead ends: 188 [2020-10-16 10:49:45,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:49:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-16 10:49:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-16 10:49:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-16 10:49:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-10-16 10:49:45,057 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-10-16 10:49:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:45,058 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-10-16 10:49:45,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:49:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-10-16 10:49:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:45,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:45,058 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:45,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-16 10:49:45,267 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:45,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-16 10:49:45,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:45,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725365510] [2020-10-16 10:49:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:45,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725365510] [2020-10-16 10:49:45,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533403092] [2020-10-16 10:49:45,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:45,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:49:45,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:45,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:45,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:45,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716528520] [2020-10-16 10:49:45,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:45,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:45,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:45,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:45,823 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-10-16 10:49:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:45,904 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-10-16 10:49:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:49:45,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:49:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:45,906 INFO L225 Difference]: With dead ends: 249 [2020-10-16 10:49:45,906 INFO L226 Difference]: Without dead ends: 241 [2020-10-16 10:49:45,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-16 10:49:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-10-16 10:49:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-16 10:49:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-10-16 10:49:45,911 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-10-16 10:49:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:45,911 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-10-16 10:49:45,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-10-16 10:49:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:49:45,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:45,912 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:46,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 10:49:46,123 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-16 10:49:46,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:46,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280705647] [2020-10-16 10:49:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:46,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280705647] [2020-10-16 10:49:46,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66935055] [2020-10-16 10:49:46,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:46,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:46,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:49:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:46,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 10:49:46,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-16 10:49:46,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570692255] [2020-10-16 10:49:46,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:49:46,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:49:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:49:46,411 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-10-16 10:49:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:46,443 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-10-16 10:49:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:49:46,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-16 10:49:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:46,445 INFO L225 Difference]: With dead ends: 278 [2020-10-16 10:49:46,445 INFO L226 Difference]: Without dead ends: 248 [2020-10-16 10:49:46,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:49:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-16 10:49:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-16 10:49:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-16 10:49:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-10-16 10:49:46,449 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-10-16 10:49:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:46,449 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-10-16 10:49:46,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:49:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-10-16 10:49:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:46,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:46,450 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:46,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:46,661 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-16 10:49:46,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:46,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049707263] [2020-10-16 10:49:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:46,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049707263] [2020-10-16 10:49:46,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526809985] [2020-10-16 10:49:46,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:46,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:46,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:47,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:47,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:47,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446171220] [2020-10-16 10:49:47,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:47,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:47,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:47,075 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-10-16 10:49:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:47,138 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-10-16 10:49:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:49:47,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:47,139 INFO L225 Difference]: With dead ends: 275 [2020-10-16 10:49:47,140 INFO L226 Difference]: Without dead ends: 273 [2020-10-16 10:49:47,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-16 10:49:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-10-16 10:49:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-16 10:49:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-10-16 10:49:47,143 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-10-16 10:49:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:47,144 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-10-16 10:49:47,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-10-16 10:49:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:47,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:47,144 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:47,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:47,345 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-16 10:49:47,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:47,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749821361] [2020-10-16 10:49:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:47,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749821361] [2020-10-16 10:49:47,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140223656] [2020-10-16 10:49:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:47,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:47,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:47,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:47,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:47,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:47,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465632149] [2020-10-16 10:49:47,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:47,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:47,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:47,680 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-10-16 10:49:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:47,913 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-10-16 10:49:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:49:47,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:47,916 INFO L225 Difference]: With dead ends: 295 [2020-10-16 10:49:47,916 INFO L226 Difference]: Without dead ends: 292 [2020-10-16 10:49:47,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:49:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-16 10:49:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-16 10:49:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-16 10:49:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-10-16 10:49:47,922 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-10-16 10:49:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:47,922 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-10-16 10:49:47,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-10-16 10:49:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:47,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:47,923 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:48,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:48,135 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-16 10:49:48,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:48,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148091450] [2020-10-16 10:49:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:48,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148091450] [2020-10-16 10:49:48,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143394979] [2020-10-16 10:49:48,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:49,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:49,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:49,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303471718] [2020-10-16 10:49:49,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:49,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:49,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:49,230 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-10-16 10:49:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:49,537 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-10-16 10:49:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:49:49,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:49,539 INFO L225 Difference]: With dead ends: 320 [2020-10-16 10:49:49,540 INFO L226 Difference]: Without dead ends: 316 [2020-10-16 10:49:49,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:49:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-16 10:49:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-10-16 10:49:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-16 10:49:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-10-16 10:49:49,545 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-10-16 10:49:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:49,545 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-10-16 10:49:49,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-10-16 10:49:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:49,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:49,546 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:49,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:49,747 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-16 10:49:49,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:49,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145165862] [2020-10-16 10:49:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:49,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145165862] [2020-10-16 10:49:49,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860512958] [2020-10-16 10:49:49,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:49,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:49,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:50,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:50,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:50,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567016330] [2020-10-16 10:49:50,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:50,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:50,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:50,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:50,191 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-10-16 10:49:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:50,530 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-10-16 10:49:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:49:50,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:50,531 INFO L225 Difference]: With dead ends: 316 [2020-10-16 10:49:50,531 INFO L226 Difference]: Without dead ends: 313 [2020-10-16 10:49:50,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:49:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-16 10:49:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-10-16 10:49:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-16 10:49:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-10-16 10:49:50,540 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-10-16 10:49:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:50,540 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-10-16 10:49:50,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-10-16 10:49:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:50,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:50,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:50,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 10:49:50,741 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-16 10:49:50,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:50,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571505395] [2020-10-16 10:49:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:50,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571505395] [2020-10-16 10:49:50,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970287078] [2020-10-16 10:49:50,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:50,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:49:50,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:50,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:50,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:55,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:55,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:55,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639633882] [2020-10-16 10:49:55,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:55,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:55,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:55,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:49:55,076 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-10-16 10:49:59,295 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:49:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:59,553 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-10-16 10:49:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:49:59,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:59,555 INFO L225 Difference]: With dead ends: 342 [2020-10-16 10:49:59,555 INFO L226 Difference]: Without dead ends: 337 [2020-10-16 10:49:59,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-16 10:49:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-16 10:49:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-16 10:49:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 10:49:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-16 10:49:59,560 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-16 10:49:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:59,560 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-16 10:49:59,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-16 10:49:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:59,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:59,561 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:59,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 10:49:59,762 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-16 10:49:59,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:59,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500619154] [2020-10-16 10:49:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:59,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500619154] [2020-10-16 10:49:59,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956438558] [2020-10-16 10:49:59,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:59,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:00,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:00,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673445538] [2020-10-16 10:50:00,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:00,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:00,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:00,233 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-16 10:50:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:00,593 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-10-16 10:50:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:50:00,594 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:00,595 INFO L225 Difference]: With dead ends: 331 [2020-10-16 10:50:00,595 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 10:50:00,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 10:50:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-10-16 10:50:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 10:50:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-16 10:50:00,601 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-16 10:50:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:00,601 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-16 10:50:00,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-16 10:50:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:00,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:00,602 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:00,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 10:50:00,814 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-16 10:50:00,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:00,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712406928] [2020-10-16 10:50:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:00,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712406928] [2020-10-16 10:50:00,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169552859] [2020-10-16 10:50:00,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:00,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:00,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:01,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:01,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:01,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5564794] [2020-10-16 10:50:01,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:01,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:01,150 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-16 10:50:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:01,500 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-10-16 10:50:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:50:01,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:01,501 INFO L225 Difference]: With dead ends: 321 [2020-10-16 10:50:01,501 INFO L226 Difference]: Without dead ends: 318 [2020-10-16 10:50:01,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-16 10:50:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-16 10:50:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:50:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-16 10:50:01,507 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-16 10:50:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:01,507 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-16 10:50:01,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-16 10:50:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:01,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:01,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:01,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 10:50:01,720 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-16 10:50:01,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:01,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60559997] [2020-10-16 10:50:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:01,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60559997] [2020-10-16 10:50:01,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313332146] [2020-10-16 10:50:01,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:01,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:50:01,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:02,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:02,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:02,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713862500] [2020-10-16 10:50:02,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:02,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:02,051 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-16 10:50:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:02,420 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-16 10:50:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:02,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:02,422 INFO L225 Difference]: With dead ends: 348 [2020-10-16 10:50:02,422 INFO L226 Difference]: Without dead ends: 343 [2020-10-16 10:50:02,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-16 10:50:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-10-16 10:50:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 10:50:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-10-16 10:50:02,427 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-10-16 10:50:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:02,427 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-10-16 10:50:02,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-10-16 10:50:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:02,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:02,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:02,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 10:50:02,629 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-16 10:50:02,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:02,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487583513] [2020-10-16 10:50:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:02,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487583513] [2020-10-16 10:50:02,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723642631] [2020-10-16 10:50:02,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:02,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:02,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126612172] [2020-10-16 10:50:02,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:02,946 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-10-16 10:50:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:03,272 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-10-16 10:50:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:03,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:03,274 INFO L225 Difference]: With dead ends: 349 [2020-10-16 10:50:03,275 INFO L226 Difference]: Without dead ends: 344 [2020-10-16 10:50:03,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-16 10:50:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-10-16 10:50:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:50:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-16 10:50:03,281 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-16 10:50:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:03,281 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-16 10:50:03,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-16 10:50:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:03,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:03,282 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:03,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-16 10:50:03,489 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-16 10:50:03,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:03,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921918328] [2020-10-16 10:50:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:03,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921918328] [2020-10-16 10:50:03,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060436820] [2020-10-16 10:50:03,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:03,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:03,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:03,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:03,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:03,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109470470] [2020-10-16 10:50:03,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:03,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:03,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:03,820 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-16 10:50:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:04,103 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-10-16 10:50:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:50:04,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:04,104 INFO L225 Difference]: With dead ends: 332 [2020-10-16 10:50:04,104 INFO L226 Difference]: Without dead ends: 314 [2020-10-16 10:50:04,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-16 10:50:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-16 10:50:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 10:50:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-10-16 10:50:04,109 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-10-16 10:50:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:04,109 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-10-16 10:50:04,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-10-16 10:50:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:04,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:04,110 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:04,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:04,310 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-16 10:50:04,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:04,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261152717] [2020-10-16 10:50:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:04,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261152717] [2020-10-16 10:50:04,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102859814] [2020-10-16 10:50:04,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:04,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:50:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:04,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:04,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:04,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529479634] [2020-10-16 10:50:04,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:04,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:04,656 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-10-16 10:50:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:04,928 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-10-16 10:50:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:50:04,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:04,931 INFO L225 Difference]: With dead ends: 315 [2020-10-16 10:50:04,931 INFO L226 Difference]: Without dead ends: 312 [2020-10-16 10:50:04,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-16 10:50:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-10-16 10:50:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:50:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-16 10:50:04,937 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-16 10:50:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:04,937 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-16 10:50:04,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-16 10:50:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:04,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:04,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:05,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:05,149 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-16 10:50:05,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:05,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466921248] [2020-10-16 10:50:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466921248] [2020-10-16 10:50:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468483000] [2020-10-16 10:50:05,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:05,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:05,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:05,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:05,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:05,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:05,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502457691] [2020-10-16 10:50:05,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:05,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:05,495 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-16 10:50:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:05,808 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-10-16 10:50:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:50:05,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:05,810 INFO L225 Difference]: With dead ends: 334 [2020-10-16 10:50:05,811 INFO L226 Difference]: Without dead ends: 330 [2020-10-16 10:50:05,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-16 10:50:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-10-16 10:50:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 10:50:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-10-16 10:50:05,815 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-10-16 10:50:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:05,815 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-10-16 10:50:05,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-10-16 10:50:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:05,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:05,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:06,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:06,017 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:06,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-16 10:50:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:06,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998342866] [2020-10-16 10:50:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:06,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998342866] [2020-10-16 10:50:06,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554569588] [2020-10-16 10:50:06,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:06,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:06,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:06,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:06,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:06,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:06,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974425325] [2020-10-16 10:50:06,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:06,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:06,439 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-10-16 10:50:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:06,846 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-10-16 10:50:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:06,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:06,848 INFO L225 Difference]: With dead ends: 351 [2020-10-16 10:50:06,848 INFO L226 Difference]: Without dead ends: 346 [2020-10-16 10:50:06,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-16 10:50:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-16 10:50:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 10:50:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-10-16 10:50:06,853 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-10-16 10:50:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:06,853 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-10-16 10:50:06,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-10-16 10:50:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:06,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:06,854 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:07,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:07,056 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-16 10:50:07,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:07,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156915444] [2020-10-16 10:50:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:07,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156915444] [2020-10-16 10:50:07,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885212325] [2020-10-16 10:50:07,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:07,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:07,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:07,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:07,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:07,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:07,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:07,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546195595] [2020-10-16 10:50:07,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:07,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:07,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:07,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:07,382 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-10-16 10:50:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:07,711 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-10-16 10:50:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:07,712 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:07,713 INFO L225 Difference]: With dead ends: 357 [2020-10-16 10:50:07,713 INFO L226 Difference]: Without dead ends: 339 [2020-10-16 10:50:07,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-16 10:50:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-10-16 10:50:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 10:50:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-10-16 10:50:07,718 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-10-16 10:50:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:07,719 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-10-16 10:50:07,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-10-16 10:50:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:07,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:07,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:07,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:07,922 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-16 10:50:07,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:07,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460919884] [2020-10-16 10:50:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:08,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460919884] [2020-10-16 10:50:08,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388863674] [2020-10-16 10:50:08,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:08,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:08,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:08,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206869312] [2020-10-16 10:50:08,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:08,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:08,322 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-10-16 10:50:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:08,624 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-10-16 10:50:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:50:08,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:08,625 INFO L225 Difference]: With dead ends: 332 [2020-10-16 10:50:08,625 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 10:50:08,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 10:50:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-10-16 10:50:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:50:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-10-16 10:50:08,629 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-10-16 10:50:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:08,629 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-10-16 10:50:08,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-10-16 10:50:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:08,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:08,630 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:08,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 10:50:08,831 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-16 10:50:08,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:08,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123331167] [2020-10-16 10:50:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:08,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123331167] [2020-10-16 10:50:08,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691306373] [2020-10-16 10:50:08,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:09,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:09,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:09,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:09,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:09,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:09,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004348006] [2020-10-16 10:50:09,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:09,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:09,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:09,228 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-10-16 10:50:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:09,405 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-10-16 10:50:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:50:09,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:09,406 INFO L225 Difference]: With dead ends: 322 [2020-10-16 10:50:09,406 INFO L226 Difference]: Without dead ends: 309 [2020-10-16 10:50:09,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:50:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-16 10:50:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-10-16 10:50:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:50:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-16 10:50:09,410 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-16 10:50:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:09,410 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-16 10:50:09,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-16 10:50:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:09,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:09,411 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:09,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 10:50:09,612 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:09,612 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-16 10:50:09,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:09,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522049721] [2020-10-16 10:50:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:09,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522049721] [2020-10-16 10:50:09,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795014043] [2020-10-16 10:50:09,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:09,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:09,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:09,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:10,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:10,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:10,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127890459] [2020-10-16 10:50:10,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:10,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:10,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:10,039 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-16 10:50:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:10,121 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-10-16 10:50:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:50:10,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:10,122 INFO L225 Difference]: With dead ends: 305 [2020-10-16 10:50:10,122 INFO L226 Difference]: Without dead ends: 303 [2020-10-16 10:50:10,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:50:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-16 10:50:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-10-16 10:50:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-16 10:50:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-10-16 10:50:10,128 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-10-16 10:50:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:10,128 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-10-16 10:50:10,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-10-16 10:50:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:10,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:10,129 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:10,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 10:50:10,338 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-16 10:50:10,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:10,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118875927] [2020-10-16 10:50:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:10,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118875927] [2020-10-16 10:50:10,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521993870] [2020-10-16 10:50:10,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:10,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:10,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:10,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:10,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:10,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:10,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685523030] [2020-10-16 10:50:10,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:10,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:10,714 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-10-16 10:50:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:10,972 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-10-16 10:50:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:10,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:10,974 INFO L225 Difference]: With dead ends: 325 [2020-10-16 10:50:10,974 INFO L226 Difference]: Without dead ends: 322 [2020-10-16 10:50:10,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:50:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-16 10:50:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-10-16 10:50:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:50:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:50:10,979 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:50:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:10,979 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:50:10,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:50:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:10,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:10,979 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:11,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 10:50:11,180 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-16 10:50:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:11,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114694272] [2020-10-16 10:50:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:11,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114694272] [2020-10-16 10:50:11,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930520646] [2020-10-16 10:50:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:11,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:11,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:11,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:11,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:11,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516379250] [2020-10-16 10:50:11,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:11,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:11,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:11,637 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:50:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:11,979 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-16 10:50:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:11,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:11,980 INFO L225 Difference]: With dead ends: 348 [2020-10-16 10:50:11,980 INFO L226 Difference]: Without dead ends: 344 [2020-10-16 10:50:11,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-16 10:50:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-16 10:50:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-16 10:50:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-10-16 10:50:11,985 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-10-16 10:50:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:11,985 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-10-16 10:50:11,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-10-16 10:50:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:11,986 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:12,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:12,187 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:12,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:12,187 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-16 10:50:12,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:12,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650411903] [2020-10-16 10:50:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:12,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650411903] [2020-10-16 10:50:12,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109441108] [2020-10-16 10:50:12,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:12,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:14,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:14,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:14,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075910529] [2020-10-16 10:50:14,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:14,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:14,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:14,797 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-10-16 10:50:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:15,221 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-10-16 10:50:15,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:15,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:15,223 INFO L225 Difference]: With dead ends: 338 [2020-10-16 10:50:15,224 INFO L226 Difference]: Without dead ends: 335 [2020-10-16 10:50:15,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-16 10:50:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-10-16 10:50:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:50:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:50:15,228 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:50:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:15,229 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:50:15,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:50:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:15,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:15,229 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:15,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:15,430 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-16 10:50:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:15,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658959270] [2020-10-16 10:50:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658959270] [2020-10-16 10:50:15,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156835248] [2020-10-16 10:50:15,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:18,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:18,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:18,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620099535] [2020-10-16 10:50:18,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:18,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:18,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:18,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:50:18,601 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:50:22,826 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:50:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:23,154 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-10-16 10:50:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:23,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:23,156 INFO L225 Difference]: With dead ends: 369 [2020-10-16 10:50:23,156 INFO L226 Difference]: Without dead ends: 364 [2020-10-16 10:50:23,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-16 10:50:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-16 10:50:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-10-16 10:50:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:50:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:50:23,161 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:50:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:23,161 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:50:23,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:50:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:23,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:23,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:23,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-16 10:50:23,372 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-16 10:50:23,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:23,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640045456] [2020-10-16 10:50:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:23,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640045456] [2020-10-16 10:50:23,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624872474] [2020-10-16 10:50:23,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:23,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:23,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:23,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:23,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:23,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559558733] [2020-10-16 10:50:23,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:23,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:23,804 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:50:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:24,249 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-10-16 10:50:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:24,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:24,250 INFO L225 Difference]: With dead ends: 352 [2020-10-16 10:50:24,250 INFO L226 Difference]: Without dead ends: 348 [2020-10-16 10:50:24,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-16 10:50:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-10-16 10:50:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:50:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-16 10:50:24,256 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-16 10:50:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:24,256 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-16 10:50:24,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-16 10:50:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:24,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:24,256 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:24,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:24,457 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-16 10:50:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:24,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856088972] [2020-10-16 10:50:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:24,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856088972] [2020-10-16 10:50:24,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905654160] [2020-10-16 10:50:24,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:24,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:24,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:24,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:24,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:24,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737867720] [2020-10-16 10:50:24,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:24,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:24,887 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-16 10:50:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:25,362 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-10-16 10:50:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:25,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:25,363 INFO L225 Difference]: With dead ends: 330 [2020-10-16 10:50:25,363 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 10:50:25,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 10:50:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-10-16 10:50:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 10:50:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-16 10:50:25,368 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-16 10:50:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:25,368 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-16 10:50:25,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-16 10:50:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:25,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:25,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:25,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:25,569 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-16 10:50:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:25,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395588218] [2020-10-16 10:50:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395588218] [2020-10-16 10:50:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413676558] [2020-10-16 10:50:25,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:25,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:25,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:25,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:25,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:25,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712924186] [2020-10-16 10:50:25,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:25,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:25,910 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-16 10:50:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:26,395 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-10-16 10:50:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:50:26,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:26,396 INFO L225 Difference]: With dead ends: 365 [2020-10-16 10:50:26,396 INFO L226 Difference]: Without dead ends: 360 [2020-10-16 10:50:26,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-16 10:50:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-10-16 10:50:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:50:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:50:26,401 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:50:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:26,402 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:50:26,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:50:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:26,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:26,402 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:26,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:26,603 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:26,604 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-16 10:50:26,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:26,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35000763] [2020-10-16 10:50:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:26,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35000763] [2020-10-16 10:50:26,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375584679] [2020-10-16 10:50:26,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:26,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:26,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:26,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:26,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:26,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037977733] [2020-10-16 10:50:26,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:26,925 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:50:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:27,334 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-10-16 10:50:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:27,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:27,335 INFO L225 Difference]: With dead ends: 363 [2020-10-16 10:50:27,336 INFO L226 Difference]: Without dead ends: 358 [2020-10-16 10:50:27,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-16 10:50:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-10-16 10:50:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 10:50:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-16 10:50:27,340 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-16 10:50:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:27,340 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-16 10:50:27,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-16 10:50:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:27,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:27,348 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:27,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-16 10:50:27,551 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-16 10:50:27,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:27,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361675673] [2020-10-16 10:50:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361675673] [2020-10-16 10:50:27,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520820201] [2020-10-16 10:50:27,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:27,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:27,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:27,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:27,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:27,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:27,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812306228] [2020-10-16 10:50:27,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:27,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:27,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:27,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:27,884 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-16 10:50:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:28,214 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-10-16 10:50:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:28,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:28,216 INFO L225 Difference]: With dead ends: 333 [2020-10-16 10:50:28,216 INFO L226 Difference]: Without dead ends: 315 [2020-10-16 10:50:28,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-16 10:50:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-10-16 10:50:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:50:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 10:50:28,220 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 10:50:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:28,221 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 10:50:28,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 10:50:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:28,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:28,221 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:28,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 10:50:28,422 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-16 10:50:28,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:28,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360650589] [2020-10-16 10:50:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:28,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360650589] [2020-10-16 10:50:28,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609196444] [2020-10-16 10:50:28,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:28,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:28,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:28,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308167811] [2020-10-16 10:50:28,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:28,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:28,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:28,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:28,907 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 10:50:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:29,050 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-10-16 10:50:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:50:29,051 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:29,052 INFO L225 Difference]: With dead ends: 296 [2020-10-16 10:50:29,052 INFO L226 Difference]: Without dead ends: 294 [2020-10-16 10:50:29,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:50:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-16 10:50:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-10-16 10:50:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-16 10:50:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-10-16 10:50:29,060 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-10-16 10:50:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:29,060 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-10-16 10:50:29,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-10-16 10:50:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:29,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:29,062 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:29,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 10:50:29,275 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:29,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-16 10:50:29,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:29,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895597388] [2020-10-16 10:50:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:29,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895597388] [2020-10-16 10:50:29,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293549324] [2020-10-16 10:50:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:29,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:29,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:29,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:29,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:29,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:29,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668162472] [2020-10-16 10:50:29,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:29,638 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-10-16 10:50:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:29,925 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-10-16 10:50:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:29,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:29,926 INFO L225 Difference]: With dead ends: 328 [2020-10-16 10:50:29,926 INFO L226 Difference]: Without dead ends: 325 [2020-10-16 10:50:29,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:50:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-16 10:50:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-10-16 10:50:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:50:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 10:50:29,931 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 10:50:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:29,931 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 10:50:29,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 10:50:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:29,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:29,931 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:30,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 10:50:30,132 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-16 10:50:30,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:30,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125972359] [2020-10-16 10:50:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:30,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125972359] [2020-10-16 10:50:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214336835] [2020-10-16 10:50:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:30,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:30,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:30,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:30,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:30,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:30,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974126282] [2020-10-16 10:50:30,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:30,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:30,719 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 10:50:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:31,265 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-10-16 10:50:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:31,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:31,267 INFO L225 Difference]: With dead ends: 344 [2020-10-16 10:50:31,267 INFO L226 Difference]: Without dead ends: 340 [2020-10-16 10:50:31,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-16 10:50:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-10-16 10:50:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:50:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 10:50:31,273 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 10:50:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:31,273 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 10:50:31,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 10:50:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:31,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:31,274 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:31,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 10:50:31,487 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-16 10:50:31,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:31,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135571478] [2020-10-16 10:50:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:31,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135571478] [2020-10-16 10:50:31,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109852800] [2020-10-16 10:50:31,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:31,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:31,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:31,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:31,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:33,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:33,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:33,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172329035] [2020-10-16 10:50:33,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:33,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:33,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:33,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:33,656 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 10:50:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:34,137 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-10-16 10:50:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:34,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:34,138 INFO L225 Difference]: With dead ends: 331 [2020-10-16 10:50:34,138 INFO L226 Difference]: Without dead ends: 328 [2020-10-16 10:50:34,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-16 10:50:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-10-16 10:50:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:50:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 10:50:34,143 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 10:50:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:34,143 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 10:50:34,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 10:50:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:34,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:34,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:34,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-16 10:50:34,354 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-16 10:50:34,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:34,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387935238] [2020-10-16 10:50:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:34,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387935238] [2020-10-16 10:50:34,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167049372] [2020-10-16 10:50:34,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:34,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:34,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:38,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003812754] [2020-10-16 10:50:38,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:50:38,232 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 10:50:42,511 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:50:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:42,857 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-10-16 10:50:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:42,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:42,859 INFO L225 Difference]: With dead ends: 357 [2020-10-16 10:50:42,859 INFO L226 Difference]: Without dead ends: 352 [2020-10-16 10:50:42,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-16 10:50:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-16 10:50:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-10-16 10:50:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:50:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 10:50:42,864 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 10:50:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:42,864 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 10:50:42,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 10:50:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:42,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:42,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:43,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:43,065 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-16 10:50:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:43,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891728409] [2020-10-16 10:50:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:43,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891728409] [2020-10-16 10:50:43,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687706333] [2020-10-16 10:50:43,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:43,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:43,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:43,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:43,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:43,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:43,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:43,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381453948] [2020-10-16 10:50:43,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:43,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:43,497 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 10:50:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:44,005 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-10-16 10:50:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:44,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:44,007 INFO L225 Difference]: With dead ends: 339 [2020-10-16 10:50:44,007 INFO L226 Difference]: Without dead ends: 335 [2020-10-16 10:50:44,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-16 10:50:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-10-16 10:50:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 10:50:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-16 10:50:44,013 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-16 10:50:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:44,013 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-16 10:50:44,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-16 10:50:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:44,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:44,013 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:44,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:44,214 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-16 10:50:44,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:44,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146045318] [2020-10-16 10:50:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:44,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146045318] [2020-10-16 10:50:44,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893696313] [2020-10-16 10:50:44,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:44,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:44,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:44,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:44,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332471370] [2020-10-16 10:50:44,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:44,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:44,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:44,599 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-16 10:50:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:44,746 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-10-16 10:50:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:50:44,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:44,748 INFO L225 Difference]: With dead ends: 287 [2020-10-16 10:50:44,748 INFO L226 Difference]: Without dead ends: 285 [2020-10-16 10:50:44,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:50:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-16 10:50:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-10-16 10:50:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:50:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 10:50:44,752 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 10:50:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:44,752 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 10:50:44,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 10:50:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:44,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:44,753 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:44,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:44,954 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:44,954 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-16 10:50:44,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:44,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845560803] [2020-10-16 10:50:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:45,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845560803] [2020-10-16 10:50:45,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269498683] [2020-10-16 10:50:45,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:45,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:45,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:45,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844578332] [2020-10-16 10:50:45,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:45,305 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 10:50:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:45,659 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-10-16 10:50:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:45,660 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:45,660 INFO L225 Difference]: With dead ends: 317 [2020-10-16 10:50:45,661 INFO L226 Difference]: Without dead ends: 314 [2020-10-16 10:50:45,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:50:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-16 10:50:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-10-16 10:50:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 10:50:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-16 10:50:45,666 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-16 10:50:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:45,667 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-16 10:50:45,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-16 10:50:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:45,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:45,667 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:45,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:45,868 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:45,869 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-16 10:50:45,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:45,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249792623] [2020-10-16 10:50:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:45,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249792623] [2020-10-16 10:50:45,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776357410] [2020-10-16 10:50:45,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:46,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:46,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:46,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:46,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:46,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715982478] [2020-10-16 10:50:46,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:46,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:46,282 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-16 10:50:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:46,719 INFO L93 Difference]: Finished difference Result 330 states and 807 transitions. [2020-10-16 10:50:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:46,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:46,721 INFO L225 Difference]: With dead ends: 330 [2020-10-16 10:50:46,721 INFO L226 Difference]: Without dead ends: 326 [2020-10-16 10:50:46,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-16 10:50:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 262. [2020-10-16 10:50:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:50:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-16 10:50:46,726 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-16 10:50:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:46,726 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-16 10:50:46,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-16 10:50:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:46,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:46,727 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:46,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:46,928 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-16 10:50:46,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:46,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617047726] [2020-10-16 10:50:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:47,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617047726] [2020-10-16 10:50:47,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948079061] [2020-10-16 10:50:47,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:47,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:47,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:47,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:47,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:47,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:47,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:47,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668467475] [2020-10-16 10:50:47,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:47,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:47,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:47,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:47,310 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-16 10:50:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:47,502 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-10-16 10:50:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:50:47,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:47,504 INFO L225 Difference]: With dead ends: 278 [2020-10-16 10:50:47,504 INFO L226 Difference]: Without dead ends: 276 [2020-10-16 10:50:47,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:50:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-16 10:50:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-10-16 10:50:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:50:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-16 10:50:47,509 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-16 10:50:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:47,509 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-16 10:50:47,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-16 10:50:47,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:47,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:47,510 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:47,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:47,710 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-16 10:50:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:47,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980776193] [2020-10-16 10:50:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:47,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980776193] [2020-10-16 10:50:47,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079095209] [2020-10-16 10:50:47,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:47,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:47,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:47,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:47,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:48,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:48,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:48,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011089820] [2020-10-16 10:50:48,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:48,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:48,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:48,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:48,092 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-16 10:50:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:48,484 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-10-16 10:50:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:48,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:48,486 INFO L225 Difference]: With dead ends: 306 [2020-10-16 10:50:48,486 INFO L226 Difference]: Without dead ends: 303 [2020-10-16 10:50:48,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:50:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-16 10:50:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-16 10:50:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 10:50:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-10-16 10:50:48,491 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-10-16 10:50:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:48,491 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-10-16 10:50:48,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-10-16 10:50:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:48,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:48,491 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:48,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-16 10:50:48,692 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-16 10:50:48,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:48,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031461439] [2020-10-16 10:50:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:48,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031461439] [2020-10-16 10:50:48,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542734532] [2020-10-16 10:50:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:48,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:48,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:48,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:50:48,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:48,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:48,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:50:48,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902426605] [2020-10-16 10:50:48,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:50:48,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:48,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:50:48,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:50:48,890 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-10-16 10:50:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:49,079 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-10-16 10:50:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:50:49,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:50:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:49,081 INFO L225 Difference]: With dead ends: 269 [2020-10-16 10:50:49,082 INFO L226 Difference]: Without dead ends: 267 [2020-10-16 10:50:49,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:50:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-16 10:50:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-10-16 10:50:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 10:50:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-10-16 10:50:49,086 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-10-16 10:50:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:49,086 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-10-16 10:50:49,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:50:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-10-16 10:50:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:49,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:49,087 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:49,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:49,299 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-16 10:50:49,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:49,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962731434] [2020-10-16 10:50:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:49,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962731434] [2020-10-16 10:50:49,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346100758] [2020-10-16 10:50:49,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:49,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:49,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:49,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:49,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541982640] [2020-10-16 10:50:49,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:49,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:49,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:49,680 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-10-16 10:50:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:50,234 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-10-16 10:50:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:50,235 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:50,236 INFO L225 Difference]: With dead ends: 298 [2020-10-16 10:50:50,236 INFO L226 Difference]: Without dead ends: 294 [2020-10-16 10:50:50,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-16 10:50:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-10-16 10:50:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-16 10:50:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-10-16 10:50:50,241 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-10-16 10:50:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:50,241 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-10-16 10:50:50,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-10-16 10:50:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:50,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:50,242 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:50,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 10:50:50,451 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:50,452 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-16 10:50:50,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:50,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492639179] [2020-10-16 10:50:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492639179] [2020-10-16 10:50:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811702687] [2020-10-16 10:50:50,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:50,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:50,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:50,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252554896] [2020-10-16 10:50:50,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:50,866 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-10-16 10:50:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:51,420 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-10-16 10:50:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:50:51,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:51,422 INFO L225 Difference]: With dead ends: 313 [2020-10-16 10:50:51,422 INFO L226 Difference]: Without dead ends: 310 [2020-10-16 10:50:51,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-16 10:50:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-10-16 10:50:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:50:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-10-16 10:50:51,427 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-10-16 10:50:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:51,428 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-10-16 10:50:51,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-10-16 10:50:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:51,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:51,428 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:51,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:51,639 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-16 10:50:51,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:51,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916605137] [2020-10-16 10:50:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916605137] [2020-10-16 10:50:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939118540] [2020-10-16 10:50:51,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:51,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:51,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:51,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:51,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:50:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:52,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:52,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:52,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595228028] [2020-10-16 10:50:52,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:52,039 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-10-16 10:50:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:52,712 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-10-16 10:50:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:50:52,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:52,714 INFO L225 Difference]: With dead ends: 314 [2020-10-16 10:50:52,714 INFO L226 Difference]: Without dead ends: 309 [2020-10-16 10:50:52,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:50:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-16 10:50:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-10-16 10:50:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:50:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-10-16 10:50:52,718 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-10-16 10:50:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:52,718 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-10-16 10:50:52,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-10-16 10:50:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:52,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:52,719 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:52,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:52,921 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:52,922 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-16 10:50:52,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:52,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343491529] [2020-10-16 10:50:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:53,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343491529] [2020-10-16 10:50:53,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772275327] [2020-10-16 10:50:53,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:53,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:53,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:53,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:53,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:53,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:53,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:53,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132292471] [2020-10-16 10:50:53,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:53,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:53,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:53,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:53,306 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 17 states. [2020-10-16 10:50:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:54,137 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-10-16 10:50:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:54,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:54,140 INFO L225 Difference]: With dead ends: 333 [2020-10-16 10:50:54,140 INFO L226 Difference]: Without dead ends: 328 [2020-10-16 10:50:54,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:50:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-16 10:50:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-10-16 10:50:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:50:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-10-16 10:50:54,163 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-10-16 10:50:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:54,164 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-10-16 10:50:54,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-10-16 10:50:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:54,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:54,165 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:54,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-16 10:50:54,369 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-16 10:50:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:54,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798637092] [2020-10-16 10:50:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798637092] [2020-10-16 10:50:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045677705] [2020-10-16 10:50:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:54,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:54,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:54,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:54,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:54,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:54,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:54,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462701315] [2020-10-16 10:50:54,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:54,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:54,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:54,783 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 17 states. [2020-10-16 10:50:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:55,278 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-16 10:50:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:50:55,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:55,280 INFO L225 Difference]: With dead ends: 350 [2020-10-16 10:50:55,280 INFO L226 Difference]: Without dead ends: 346 [2020-10-16 10:50:55,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-16 10:50:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 261. [2020-10-16 10:50:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-16 10:50:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-10-16 10:50:55,286 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-10-16 10:50:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:55,286 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-10-16 10:50:55,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-10-16 10:50:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:55,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:55,287 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:55,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:55,488 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-16 10:50:55,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:55,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2379228] [2020-10-16 10:50:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:55,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2379228] [2020-10-16 10:50:55,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244864639] [2020-10-16 10:50:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:55,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:55,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:55,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:55,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:55,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:55,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:55,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597463941] [2020-10-16 10:50:55,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:55,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:55,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:55,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:55,893 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-10-16 10:50:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:56,582 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-10-16 10:50:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:50:56,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:56,584 INFO L225 Difference]: With dead ends: 362 [2020-10-16 10:50:56,584 INFO L226 Difference]: Without dead ends: 358 [2020-10-16 10:50:56,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:50:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-16 10:50:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-10-16 10:50:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:50:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-10-16 10:50:56,589 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-10-16 10:50:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:56,589 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-10-16 10:50:56,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-10-16 10:50:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:56,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:56,590 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:56,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:56,790 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-16 10:50:56,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:56,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252749182] [2020-10-16 10:50:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:56,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252749182] [2020-10-16 10:50:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440593373] [2020-10-16 10:50:56,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:56,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:56,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:57,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:50:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:57,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:57,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:57,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932660972] [2020-10-16 10:50:57,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:57,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:57,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:57,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:57,199 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-10-16 10:50:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:57,988 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-10-16 10:50:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:50:57,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:57,990 INFO L225 Difference]: With dead ends: 322 [2020-10-16 10:50:57,990 INFO L226 Difference]: Without dead ends: 316 [2020-10-16 10:50:57,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:50:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-16 10:50:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-10-16 10:50:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:50:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-16 10:50:57,994 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-16 10:50:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:57,994 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-16 10:50:57,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-16 10:50:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:57,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:57,995 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:58,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:58,196 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-16 10:50:58,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:58,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518707399] [2020-10-16 10:50:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518707399] [2020-10-16 10:50:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582244966] [2020-10-16 10:50:58,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:58,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:58,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:58,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:00,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:00,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:00,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:51:00,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655003926] [2020-10-16 10:51:00,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:51:00,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:00,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:51:00,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:51:00,604 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-16 10:51:04,923 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-16 10:51:05,163 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-16 10:51:09,331 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-16 10:51:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:11,412 INFO L93 Difference]: Finished difference Result 395 states and 997 transitions. [2020-10-16 10:51:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:51:11,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:51:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:11,414 INFO L225 Difference]: With dead ends: 395 [2020-10-16 10:51:11,414 INFO L226 Difference]: Without dead ends: 386 [2020-10-16 10:51:11,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-16 10:51:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-16 10:51:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-10-16 10:51:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:51:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-16 10:51:11,420 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-16 10:51:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:11,421 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-16 10:51:11,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:51:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-16 10:51:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:11,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:11,422 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:11,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:11,632 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-16 10:51:11,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:11,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759997195] [2020-10-16 10:51:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759997195] [2020-10-16 10:51:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380411843] [2020-10-16 10:51:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:11,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:11,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:12,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:12,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:12,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:51:12,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381732810] [2020-10-16 10:51:12,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:51:12,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:51:12,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:12,042 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-16 10:51:12,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:13,000 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-10-16 10:51:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:51:13,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:51:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:13,001 INFO L225 Difference]: With dead ends: 358 [2020-10-16 10:51:13,002 INFO L226 Difference]: Without dead ends: 353 [2020-10-16 10:51:13,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:51:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-16 10:51:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-10-16 10:51:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:51:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-16 10:51:13,007 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-16 10:51:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:13,007 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-16 10:51:13,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:51:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-16 10:51:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:13,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:13,007 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:13,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:13,208 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-16 10:51:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:13,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198145952] [2020-10-16 10:51:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:13,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198145952] [2020-10-16 10:51:13,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57701977] [2020-10-16 10:51:13,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:13,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:13,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:13,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:13,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:13,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:51:13,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476743505] [2020-10-16 10:51:13,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:51:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:51:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:13,650 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-16 10:51:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:14,191 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-10-16 10:51:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:14,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:51:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:14,192 INFO L225 Difference]: With dead ends: 350 [2020-10-16 10:51:14,192 INFO L226 Difference]: Without dead ends: 347 [2020-10-16 10:51:14,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-16 10:51:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-10-16 10:51:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:51:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-10-16 10:51:14,196 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-10-16 10:51:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:14,196 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-10-16 10:51:14,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:51:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-10-16 10:51:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:14,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:14,197 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:14,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:14,398 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-16 10:51:14,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:14,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962452505] [2020-10-16 10:51:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:14,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962452505] [2020-10-16 10:51:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239023987] [2020-10-16 10:51:14,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:14,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:14,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:14,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-10-16 10:51:18,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 10:51:18,186 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 10:51:18,190 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 10:51:18,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 10:51:18 BasicIcfg [2020-10-16 10:51:18,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 10:51:18,192 INFO L168 Benchmark]: Toolchain (without parser) took 277481.72 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 101.3 MB in the beginning and 87.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 74.1 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:18,192 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-16 10:51:18,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.64 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 101.3 MB in the beginning and 166.4 MB in the end (delta: -65.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:18,193 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.07 ms. Allocated memory is still 205.5 MB. Free memory was 166.4 MB in the beginning and 164.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:18,193 INFO L168 Benchmark]: Boogie Preprocessor took 27.41 ms. Allocated memory is still 205.5 MB. Free memory was 164.1 MB in the beginning and 162.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:18,193 INFO L168 Benchmark]: RCFGBuilder took 491.68 ms. Allocated memory is still 205.5 MB. Free memory was 162.2 MB in the beginning and 142.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:18,193 INFO L168 Benchmark]: TraceAbstraction took 276239.41 ms. Allocated memory was 205.5 MB in the beginning and 201.3 MB in the end (delta: -4.2 MB). Free memory was 141.1 MB in the beginning and 87.5 MB in the end (delta: 53.6 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:18,195 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 659.64 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 101.3 MB in the beginning and 166.4 MB in the end (delta: -65.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.07 ms. Allocated memory is still 205.5 MB. Free memory was 166.4 MB in the beginning and 164.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.41 ms. Allocated memory is still 205.5 MB. Free memory was 164.1 MB in the beginning and 162.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.68 ms. Allocated memory is still 205.5 MB. Free memory was 162.2 MB in the beginning and 142.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 276239.41 ms. Allocated memory was 205.5 MB in the beginning and 201.3 MB in the end (delta: -4.2 MB). Free memory was 141.1 MB in the beginning and 87.5 MB in the end (delta: 53.6 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 276.0s, OverallIterations: 190, TraceHistogramMax: 6, AutomataDifference: 157.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 2509 SDtfs, 16835 SDslu, 16736 SDs, 0 SdLazy, 11902 SolverSat, 4311 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 59.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4774 GetRequests, 908 SyntacticMatches, 162 SemanticMatches, 3704 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19152 ImplicationChecksByTransitivity, 151.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 189 MinimizatonAttempts, 8988 StatesRemovedByMinimization, 188 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 65.1s InterpolantComputationTime, 4652 NumberOfCodeBlocks, 4650 NumberOfCodeBlocksAsserted, 572 NumberOfCheckSat, 4282 ConstructedInterpolants, 11 QuantifiedInterpolants, 448983 SizeOfPredicates, 179 NumberOfNonLiveVariables, 15771 ConjunctsInSsa, 1769 ConjunctsInUnsatCore, 370 InterpolantComputations, 10 PerfectInterpolantSequences, 30/1778 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