/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/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:41:28,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:41:28,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:41:28,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:41:28,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:41:28,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:41:28,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:41:28,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:41:28,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:41:28,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:41:28,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:41:28,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:41:28,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:41:28,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:41:28,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:41:28,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:41:28,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:41:28,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:41:28,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:41:28,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:41:28,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:41:28,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:41:28,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:41:28,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:41:28,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:41:28,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:41:28,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:41:28,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:41:28,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:41:28,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:41:28,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:41:28,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:41:28,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:41:28,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:41:28,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:41:28,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:41:28,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:41:28,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:41:28,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:41:28,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:41:28,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:41:28,580 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:41:28,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:41:28,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:41:28,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:41:28,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:41:28,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:41:28,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:41:28,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:41:28,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:41:28,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:41:28,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:41:28,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:41:28,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:41:28,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:41:28,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:41:28,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:41:28,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:41:28,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:41:28,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:41:28,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:41:28,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:41:28,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:41:28,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:41:28,591 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:41:28,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:41:28,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:41:28,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:41:28,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:41:28,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:41:28,949 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:41:28,949 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-10-16 11:41:29,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92e3a8a55/5c049c67e3424be582b2bcb9dc422533/FLAG69b6d14d4 [2020-10-16 11:41:29,582 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:41:29,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-2.i [2020-10-16 11:41:29,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92e3a8a55/5c049c67e3424be582b2bcb9dc422533/FLAG69b6d14d4 [2020-10-16 11:41:29,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92e3a8a55/5c049c67e3424be582b2bcb9dc422533 [2020-10-16 11:41:29,890 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:41:29,892 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:41:29,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:29,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:41:29,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:41:29,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:29" (1/1) ... [2020-10-16 11:41:29,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c725171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:29, skipping insertion in model container [2020-10-16 11:41:29,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:29" (1/1) ... [2020-10-16 11:41:29,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:41:29,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:41:30,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:30,560 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:41:30,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:30,695 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:41:30,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30 WrapperNode [2020-10-16 11:41:30,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:30,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:30,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:41:30,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:41:30,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:30,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:41:30,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:41:30,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:41:30,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (1/1) ... [2020-10-16 11:41:30,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:41:30,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:41:30,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:41:30,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:41:30,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (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 11:41:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:41:30,858 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:41:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:41:30,858 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:41:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:41:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:41:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:41:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:41:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:41:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:41:30,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:41:30,862 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 11:41:31,280 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:41:31,281 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:41:31,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:31 BoogieIcfgContainer [2020-10-16 11:41:31,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:41:31,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:41:31,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:41:31,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:41:31,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:41:29" (1/3) ... [2020-10-16 11:41:31,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d258eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:31, skipping insertion in model container [2020-10-16 11:41:31,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:30" (2/3) ... [2020-10-16 11:41:31,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d258eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:31, skipping insertion in model container [2020-10-16 11:41:31,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:31" (3/3) ... [2020-10-16 11:41:31,295 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-10-16 11:41:31,308 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:41:31,308 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:41:31,319 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:41:31,320 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:41:31,354 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,355 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,355 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,357 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,357 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,357 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,358 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,359 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,360 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,362 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,362 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,362 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,362 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,363 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,368 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,369 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,369 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,386 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:31,390 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:41:31,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:41:31,439 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:41:31,439 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:41:31,439 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:41:31,440 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:41:31,440 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:41:31,440 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:41:31,440 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:41:31,440 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:41:31,458 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:41:31,459 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:31,463 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:31,466 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:31,516 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 11:41:31,516 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:41:31,523 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 11:41:31,526 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 11:41:32,691 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 11:41:32,691 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 11:41:32,698 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 11:41:32,709 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:41:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:41:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:41:32,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:32,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:41:32,720 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 11:41:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:32,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903685927] [2020-10-16 11:41:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:32,970 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 11:41:32,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903685927] [2020-10-16 11:41:32,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:32,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:41:32,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790382739] [2020-10-16 11:41:32,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:41:32,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:32,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:41:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:41:32,991 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:41:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:33,064 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 11:41:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:41:33,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:41:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:33,079 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:33,079 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 11:41:33,080 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 11:41:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 11:41:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 11:41:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 11:41:33,122 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 11:41:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:33,122 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 11:41:33,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:41:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 11:41:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:41:33,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:33,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:33,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:41:33,124 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 11:41:33,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:33,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332487023] [2020-10-16 11:41:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:33,210 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 11:41:33,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332487023] [2020-10-16 11:41:33,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:33,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:41:33,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568410912] [2020-10-16 11:41:33,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:41:33,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:41:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:33,214 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 11:41:33,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:33,246 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 11:41:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:41:33,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:41:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:33,248 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:33,248 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 11:41:33,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 11:41:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 11:41:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 11:41:33,257 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 11:41:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:33,258 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 11:41:33,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:41:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 11:41:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:33,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:33,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:33,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:41:33,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 11:41:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:33,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988496461] [2020-10-16 11:41:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:33,328 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 11:41:33,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988496461] [2020-10-16 11:41:33,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:33,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:33,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538041976] [2020-10-16 11:41:33,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:33,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:33,331 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 11:41:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:33,427 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 11:41:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:33,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:33,430 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:33,430 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:33,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 11:41:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:33,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 11:41:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:33,441 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:33,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:33,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:33,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:33,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:41:33,443 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:33,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 11:41:33,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:33,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371971148] [2020-10-16 11:41:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:33,501 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 11:41:33,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371971148] [2020-10-16 11:41:33,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:33,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:33,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50251054] [2020-10-16 11:41:33,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:33,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:33,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:33,504 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 11:41:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:33,573 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:33,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:33,575 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:33,575 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:33,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 11:41:33,581 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 11:41:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:33,582 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 11:41:33,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 11:41:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:33,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:33,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:33,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:41:33,583 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 11:41:33,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:33,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655879448] [2020-10-16 11:41:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:33,656 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 11:41:33,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655879448] [2020-10-16 11:41:33,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:33,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:33,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179201981] [2020-10-16 11:41:33,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:33,659 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 11:41:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:33,742 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 11:41:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:33,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:33,744 INFO L225 Difference]: With dead ends: 57 [2020-10-16 11:41:33,744 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 11:41:33,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 11:41:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 11:41:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:33,751 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 11:41:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:33,751 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:33,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:33,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:33,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:33,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 11:41:33,753 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 11:41:33,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:33,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786374452] [2020-10-16 11:41:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:33,817 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 11:41:33,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786374452] [2020-10-16 11:41:33,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040468373] [2020-10-16 11:41:33,818 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 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 11:41:33,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:33,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:33,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:33,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:33,944 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 11:41:33,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:33,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:33,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365860777] [2020-10-16 11:41:33,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:33,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:33,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:33,946 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 11:41:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:34,083 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 11:41:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:34,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:34,084 INFO L225 Difference]: With dead ends: 48 [2020-10-16 11:41:34,085 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:34,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 11:41:34,096 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 11:41:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:34,097 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 11:41:34,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 11:41:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:34,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:34,099 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:34,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:41:34,300 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:34,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 11:41:34,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:34,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421905631] [2020-10-16 11:41:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:34,366 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 11:41:34,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421905631] [2020-10-16 11:41:34,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258755987] [2020-10-16 11:41:34,367 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 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 11:41:34,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:34,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:34,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:34,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:34,462 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 11:41:34,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:34,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:34,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564833276] [2020-10-16 11:41:34,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:34,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:34,464 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 11:41:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:34,551 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:34,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:34,552 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:34,552 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:34,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 11:41:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 11:41:34,559 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 11:41:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:34,562 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 11:41:34,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 11:41:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:34,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:34,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:34,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:34,770 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:34,771 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 11:41:34,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:34,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991748146] [2020-10-16 11:41:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:34,881 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 11:41:34,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991748146] [2020-10-16 11:41:34,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376737064] [2020-10-16 11:41:34,883 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 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 11:41:34,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:34,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:34,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:34,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:34,975 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 11:41:34,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:34,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:34,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029751513] [2020-10-16 11:41:34,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:34,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:34,977 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 11:41:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,097 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 11:41:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:41:35,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,099 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:41:35,099 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 11:41:35,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 11:41:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 11:41:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:35,105 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 11:41:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,106 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:35,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:35,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,107 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:35,319 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 11:41:35,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839898783] [2020-10-16 11:41:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,400 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 11:41:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839898783] [2020-10-16 11:41:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387958802] [2020-10-16 11:41:35,401 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 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 11:41:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:35,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:35,469 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 11:41:35,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:35,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:35,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836399461] [2020-10-16 11:41:35,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:35,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:35,471 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 11:41:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,633 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:35,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,636 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:35,636 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:35,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 11:41:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 11:41:35,643 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 11:41:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,643 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 11:41:35,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 11:41:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:35,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,647 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:35,848 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 11:41:35,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629738152] [2020-10-16 11:41:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,906 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 11:41:35,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629738152] [2020-10-16 11:41:35,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007224726] [2020-10-16 11:41:35,907 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 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 11:41:35,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:35,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:35,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:35,991 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 11:41:35,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:35,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:35,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381364713] [2020-10-16 11:41:35,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:35,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:35,993 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 11:41:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,190 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 11:41:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:36,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,192 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:36,193 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:36,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:41:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 11:41:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 11:41:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 11:41:36,198 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 11:41:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,198 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 11:41:36,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 11:41:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:36,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 11:41:36,411 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 11:41:36,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027175287] [2020-10-16 11:41:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,501 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 11:41:36,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027175287] [2020-10-16 11:41:36,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152938977] [2020-10-16 11:41:36,502 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 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 11:41:36,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:41:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:36,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:36,584 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 11:41:36,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:36,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:36,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980911962] [2020-10-16 11:41:36,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:36,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:36,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:36,586 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 11:41:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,703 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 11:41:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:36,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,704 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:41:36,705 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 11:41:36,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 11:41:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 11:41:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:41:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 11:41:36,710 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 11:41:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,710 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 11:41:36,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 11:41:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:36,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:36,923 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 11:41:36,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815925706] [2020-10-16 11:41:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,029 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 11:41:37,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815925706] [2020-10-16 11:41:37,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805987363] [2020-10-16 11:41:37,030 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 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 11:41:37,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:37,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:37,126 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 11:41:37,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:37,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:37,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675864117] [2020-10-16 11:41:37,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:37,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:37,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:37,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:37,128 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 11:41:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:37,367 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 11:41:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:37,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:37,369 INFO L225 Difference]: With dead ends: 61 [2020-10-16 11:41:37,369 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:37,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 11:41:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:37,373 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 11:41:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:37,374 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:37,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:37,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:37,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:37,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,588 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 11:41:37,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:37,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077876968] [2020-10-16 11:41:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,673 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 11:41:37,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077876968] [2020-10-16 11:41:37,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883040741] [2020-10-16 11:41:37,674 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 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 11:41:37,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:37,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:37,774 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 11:41:37,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:37,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151386238] [2020-10-16 11:41:37,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:37,778 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 11:41:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:37,952 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:37,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:37,953 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:37,953 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:37,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:41:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 11:41:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 11:41:37,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 11:41:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:37,963 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 11:41:37,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 11:41:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:37,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:37,964 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:41:38,165 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 11:41:38,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991657165] [2020-10-16 11:41:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,225 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 11:41:38,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991657165] [2020-10-16 11:41:38,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130307348] [2020-10-16 11:41:38,226 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 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 11:41:38,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:38,308 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 11:41:38,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:38,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:38,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692803651] [2020-10-16 11:41:38,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:38,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:38,310 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 11:41:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:38,492 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-16 11:41:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:38,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:38,494 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:38,494 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:38,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-16 11:41:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 11:41:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 11:41:38,499 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 11:41:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:38,499 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 11:41:38,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 11:41:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:38,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:38,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,712 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 11:41:38,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572101885] [2020-10-16 11:41:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,783 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 11:41:38,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572101885] [2020-10-16 11:41:38,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620425799] [2020-10-16 11:41:38,785 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 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 11:41:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:38,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:38,867 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 11:41:38,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:38,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:38,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852581174] [2020-10-16 11:41:38,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:38,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:38,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:38,871 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 11:41:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,092 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 11:41:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:39,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,099 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:39,099 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:39,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 11:41:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:39,103 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 11:41:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,103 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:39,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:39,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,104 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:39,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:41:39,307 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-16 11:41:39,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:39,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667923774] [2020-10-16 11:41:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:39,381 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 11:41:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667923774] [2020-10-16 11:41:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516969900] [2020-10-16 11:41:39,383 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 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 11:41:39,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:39,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:39,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:39,468 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 11:41:39,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:39,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:39,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868181845] [2020-10-16 11:41:39,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:39,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:39,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:39,471 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 11:41:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,683 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 11:41:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:39,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,684 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:39,684 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 11:41:39,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 11:41:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 11:41:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 11:41:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 11:41:39,688 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 11:41:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,688 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 11:41:39,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 11:41:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:39,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,692 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:39,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:41:39,902 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 11:41:39,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:39,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720636095] [2020-10-16 11:41:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:39,986 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 11:41:39,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720636095] [2020-10-16 11:41:39,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780485044] [2020-10-16 11:41:39,987 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 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 11:41:40,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:40,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:40,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:40,051 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 11:41:40,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:40,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:40,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039373374] [2020-10-16 11:41:40,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:40,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:40,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:40,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:40,053 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 11:41:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:40,185 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 11:41:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:40,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:40,186 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:40,187 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:40,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:41:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 11:41:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 11:41:40,190 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 11:41:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:40,191 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 11:41:40,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 11:41:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:40,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:40,192 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:40,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:41:40,403 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,403 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 11:41:40,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981339632] [2020-10-16 11:41:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,477 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 11:41:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981339632] [2020-10-16 11:41:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384489701] [2020-10-16 11:41:40,478 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 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 11:41:40,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:40,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:40,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:40,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:40,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048232144] [2020-10-16 11:41:40,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:40,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:40,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:40,579 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 11:41:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:40,722 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 11:41:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:40,722 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:40,723 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:40,724 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:40,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 11:41:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:40,729 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 11:41:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:40,730 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:40,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:40,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:40,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:40,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:41:40,939 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 11:41:40,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840681396] [2020-10-16 11:41:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,051 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 11:41:41,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840681396] [2020-10-16 11:41:41,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320180653] [2020-10-16 11:41:41,052 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 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 11:41:41,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:41,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:41,154 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 11:41:41,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:41,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:41,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000263367] [2020-10-16 11:41:41,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:41,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:41,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:41,156 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 11:41:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:41,319 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 11:41:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:41,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:41,321 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:41,321 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:41,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 11:41:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 11:41:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 11:41:41,328 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 11:41:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:41,329 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 11:41:41,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 11:41:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:41,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,330 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:41,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:41,539 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:41,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:41,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 11:41:41,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:41,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163453254] [2020-10-16 11:41:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,606 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 11:41:41,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163453254] [2020-10-16 11:41:41,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122700746] [2020-10-16 11:41:41,607 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 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 11:41:41,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:41,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:41,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:41,710 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 11:41:41,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:41,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:41,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867024835] [2020-10-16 11:41:41,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:41,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:41,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:41,718 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 11:41:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:41,980 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 11:41:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:41,980 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:41,981 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:41,981 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:41,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 11:41:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:41,984 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 11:41:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:41,984 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:41,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:41,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,988 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:42,189 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 11:41:42,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518846828] [2020-10-16 11:41:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,247 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 11:41:42,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518846828] [2020-10-16 11:41:42,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834646156] [2020-10-16 11:41:42,248 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 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 11:41:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:42,314 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 11:41:42,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:42,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868415681] [2020-10-16 11:41:42,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:42,316 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 11:41:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,528 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:41:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:42,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,532 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:41:42,532 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:41:42,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:41:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 11:41:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 11:41:42,551 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 11:41:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,551 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 11:41:42,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 11:41:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:42,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,552 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:42,765 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 11:41:42,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858583418] [2020-10-16 11:41:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,842 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 11:41:42,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858583418] [2020-10-16 11:41:42,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258914351] [2020-10-16 11:41:42,843 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 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 11:41:42,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:42,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:42,938 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 11:41:42,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:42,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:42,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047884691] [2020-10-16 11:41:42,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:42,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:42,940 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 11:41:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,227 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 11:41:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:43,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,230 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:43,230 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:43,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 11:41:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:41:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 11:41:43,235 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 11:41:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,235 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 11:41:43,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 11:41:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:43,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:41:43,448 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 11:41:43,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585967653] [2020-10-16 11:41:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,529 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 11:41:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585967653] [2020-10-16 11:41:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001520612] [2020-10-16 11:41:43,530 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 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 11:41:43,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:43,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,608 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 11:41:43,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49147888] [2020-10-16 11:41:43,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:43,610 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 11:41:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,758 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 11:41:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:43,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,760 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:43,760 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:43,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 11:41:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:43,765 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,765 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:43,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:43,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,766 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:41:43,977 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,978 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 11:41:43,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089972314] [2020-10-16 11:41:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,057 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 11:41:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089972314] [2020-10-16 11:41:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655158375] [2020-10-16 11:41:44,058 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 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 11:41:44,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:44,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:44,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:44,156 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 11:41:44,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:44,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537007904] [2020-10-16 11:41:44,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:44,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:44,158 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,391 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 11:41:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:44,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,393 INFO L225 Difference]: With dead ends: 71 [2020-10-16 11:41:44,393 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 11:41:44,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 11:41:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 11:41:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:44,397 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,408 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:44,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:44,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,409 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:41:44,619 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 11:41:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628052461] [2020-10-16 11:41:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,694 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 11:41:44,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628052461] [2020-10-16 11:41:44,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154863834] [2020-10-16 11:41:44,695 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 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 11:41:44,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:44,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,775 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 11:41:44,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:44,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257941758] [2020-10-16 11:41:44,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:44,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:44,777 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,953 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 11:41:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:44,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,954 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:44,954 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:41:44,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:41:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 11:41:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:44,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,958 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:44,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:44,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:41:45,166 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 11:41:45,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020387894] [2020-10-16 11:41:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,261 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 11:41:45,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020387894] [2020-10-16 11:41:45,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932296315] [2020-10-16 11:41:45,262 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 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 11:41:45,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:45,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:45,345 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 11:41:45,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283069995] [2020-10-16 11:41:45,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:45,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:45,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:45,347 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:45,652 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 11:41:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:45,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:45,653 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:45,654 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:45,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 11:41:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:45,657 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:45,658 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:45,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:45,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:41:45,859 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 11:41:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135282436] [2020-10-16 11:41:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,926 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 11:41:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135282436] [2020-10-16 11:41:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924060433] [2020-10-16 11:41:45,927 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 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 11:41:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,999 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 11:41:46,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:46,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232824595] [2020-10-16 11:41:46,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:46,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:46,001 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,265 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:41:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:46,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,266 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:41:46,266 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:41:46,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:41:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 11:41:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:41:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 11:41:46,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 11:41:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,270 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 11:41:46,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 11:41:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:46,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:46,480 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 11:41:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848865478] [2020-10-16 11:41:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,545 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 11:41:46,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848865478] [2020-10-16 11:41:46,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096025463] [2020-10-16 11:41:46,546 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 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 11:41:46,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:46,631 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 11:41:46,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:46,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217256981] [2020-10-16 11:41:46,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:46,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:46,634 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 11:41:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,960 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-16 11:41:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:46,960 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,961 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:41:46,961 INFO L226 Difference]: Without dead ends: 56 [2020-10-16 11:41:46,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-16 11:41:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-16 11:41:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 11:41:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 11:41:46,965 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 11:41:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,965 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 11:41:46,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 11:41:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:46,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:41:47,167 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 11:41:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180217000] [2020-10-16 11:41:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,230 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 11:41:47,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180217000] [2020-10-16 11:41:47,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967339153] [2020-10-16 11:41:47,230 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 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 11:41:47,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:47,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:47,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:47,312 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 11:41:47,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:47,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:47,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419517003] [2020-10-16 11:41:47,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:47,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:47,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:47,314 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 11:41:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,608 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 11:41:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:47,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,609 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:47,609 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:47,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 11:41:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:47,613 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 11:41:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,613 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:47,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:47,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,614 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:41:47,823 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 11:41:47,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588885016] [2020-10-16 11:41:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588885016] [2020-10-16 11:41:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337201205] [2020-10-16 11:41:47,907 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 11:41:47,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:47,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:48,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886790298] [2020-10-16 11:41:48,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:48,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:48,026 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 11:41:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,367 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 11:41:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:48,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,369 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:48,369 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:48,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:48,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 11:41:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 11:41:48,373 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 11:41:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,373 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 11:41:48,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 11:41:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:48,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,374 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:48,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:48,583 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:48,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 11:41:48,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:48,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846736885] [2020-10-16 11:41:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846736885] [2020-10-16 11:41:48,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705985579] [2020-10-16 11:41:48,670 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 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 11:41:48,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:48,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568865996] [2020-10-16 11:41:48,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:48,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:48,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:48,756 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 11:41:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,912 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 11:41:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:48,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,914 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:48,914 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:48,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 11:41:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 11:41:48,920 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 11:41:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,920 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 11:41:48,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 11:41:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:48,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,924 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:49,125 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 11:41:49,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347490460] [2020-10-16 11:41:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347490460] [2020-10-16 11:41:49,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334724057] [2020-10-16 11:41:49,259 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 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 11:41:49,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:49,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:49,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513407919] [2020-10-16 11:41:49,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:49,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:49,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:49,381 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 11:41:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,638 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 11:41:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:49,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,639 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:49,640 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:49,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 11:41:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 11:41:49,643 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 11:41:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,643 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 11:41:49,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 11:41:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:49,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,645 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 11:41:49,854 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 11:41:49,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695234901] [2020-10-16 11:41:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695234901] [2020-10-16 11:41:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534956357] [2020-10-16 11:41:49,975 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 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 11:41:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:50,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350038043] [2020-10-16 11:41:50,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:50,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:50,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:50,062 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 11:41:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,286 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 11:41:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:50,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,287 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:50,288 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:50,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 11:41:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:50,293 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 11:41:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,294 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:50,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:50,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,297 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:50,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:50,506 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 11:41:50,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:50,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718878096] [2020-10-16 11:41:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718878096] [2020-10-16 11:41:50,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089809178] [2020-10-16 11:41:50,593 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 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 11:41:50,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:50,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:50,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:50,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071021672] [2020-10-16 11:41:50,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:50,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:50,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:50,681 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 11:41:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,948 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 11:41:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:50,953 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,954 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:50,954 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:50,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 11:41:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:50,958 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 11:41:50,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,958 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:50,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:50,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,959 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:41:51,168 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 11:41:51,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58873830] [2020-10-16 11:41:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58873830] [2020-10-16 11:41:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91251802] [2020-10-16 11:41:51,307 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 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 11:41:51,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:51,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:51,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957886950] [2020-10-16 11:41:51,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:51,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:51,432 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 11:41:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:51,786 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 11:41:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:51,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:51,788 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:51,788 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:51,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 11:41:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:41:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 11:41:51,793 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 11:41:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:51,793 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 11:41:51,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 11:41:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:51,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:51,795 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:52,006 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 11:41:52,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832128322] [2020-10-16 11:41:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832128322] [2020-10-16 11:41:52,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246052256] [2020-10-16 11:41:52,142 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 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 11:41:52,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:52,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:52,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:52,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351553175] [2020-10-16 11:41:52,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:52,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:52,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:52,234 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 11:41:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,559 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 11:41:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:52,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,560 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:41:52,560 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:41:52,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:41:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 11:41:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:52,564 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 11:41:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,564 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:52,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:52,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,565 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:41:52,774 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 11:41:52,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775532106] [2020-10-16 11:41:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775532106] [2020-10-16 11:41:52,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862073738] [2020-10-16 11:41:52,847 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 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 11:41:52,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:52,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:52,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423615270] [2020-10-16 11:41:52,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:52,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:52,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:52,918 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 11:41:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,201 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 11:41:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:41:53,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,206 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:41:53,206 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:41:53,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:41:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 11:41:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:41:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 11:41:53,211 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 11:41:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,211 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 11:41:53,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 11:41:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:53,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,212 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:53,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:41:53,422 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 11:41:53,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:53,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611738876] [2020-10-16 11:41:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611738876] [2020-10-16 11:41:53,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401688008] [2020-10-16 11:41:53,491 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 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 11:41:53,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:53,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:53,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396241766] [2020-10-16 11:41:53,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:53,581 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 11:41:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,950 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 11:41:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:53,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,951 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:53,952 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:53,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 11:41:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:41:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 11:41:53,955 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 11:41:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,955 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 11:41:53,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 11:41:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:53,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:41:54,157 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 11:41:54,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258176616] [2020-10-16 11:41:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258176616] [2020-10-16 11:41:54,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724652817] [2020-10-16 11:41:54,308 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 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 11:41:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554246096] [2020-10-16 11:41:54,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:54,429 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 11:41:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:54,742 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:41:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:54,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:54,744 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:41:54,744 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:41:54,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:41:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 11:41:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:54,748 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:54,749 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:54,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:54,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:54,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:41:54,961 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 11:41:54,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985064229] [2020-10-16 11:41:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985064229] [2020-10-16 11:41:55,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913762309] [2020-10-16 11:41:55,102 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 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 11:41:55,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:55,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:55,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:55,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965995066] [2020-10-16 11:41:55,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:55,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:55,185 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,452 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 11:41:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:55,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:55,454 INFO L225 Difference]: With dead ends: 81 [2020-10-16 11:41:55,454 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:41:55,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:41:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 11:41:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:55,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:55,459 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:55,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:55,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:55,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:55,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:41:55,670 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:55,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:55,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 11:41:55,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:55,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68184560] [2020-10-16 11:41:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68184560] [2020-10-16 11:41:55,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389547299] [2020-10-16 11:41:55,759 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 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 11:41:55,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:55,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:55,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:55,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284679320] [2020-10-16 11:41:55,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:55,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:55,832 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:56,089 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:56,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,091 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:56,091 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:56,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 11:41:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:56,095 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,095 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:56,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:56,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 11:41:56,304 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 11:41:56,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832004502] [2020-10-16 11:41:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832004502] [2020-10-16 11:41:56,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145182749] [2020-10-16 11:41:56,396 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 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 11:41:56,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:56,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:56,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:56,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:56,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722447547] [2020-10-16 11:41:56,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:56,495 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:56,862 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:56,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,864 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:56,864 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:56,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 11:41:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:56,868 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,868 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:56,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:56,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,869 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:57,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:41:57,078 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 11:41:57,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:57,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369282053] [2020-10-16 11:41:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369282053] [2020-10-16 11:41:57,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944094072] [2020-10-16 11:41:57,159 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 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 11:41:57,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:57,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:57,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596126927] [2020-10-16 11:41:57,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:57,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:57,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:57,260 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:57,596 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 11:41:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:57,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:57,598 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:57,598 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:57,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 11:41:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:57,604 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:57,606 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:57,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:57,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:57,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:57,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:57,819 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 11:41:57,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:57,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661472996] [2020-10-16 11:41:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661472996] [2020-10-16 11:41:57,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651965272] [2020-10-16 11:41:57,930 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 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 11:41:58,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:58,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087144464] [2020-10-16 11:41:58,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:58,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:58,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:58,041 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,416 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 11:41:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:58,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,422 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:41:58,423 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:41:58,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:41:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:41:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 11:41:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:58,426 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,426 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:58,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:58,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:41:58,638 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 11:41:58,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132591380] [2020-10-16 11:41:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132591380] [2020-10-16 11:41:58,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338373333] [2020-10-16 11:41:58,728 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 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 11:41:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:58,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280368713] [2020-10-16 11:41:58,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:58,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:58,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:58,798 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:59,154 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:41:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:41:59,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:59,156 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:41:59,156 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:41:59,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:41:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 11:41:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:41:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 11:41:59,160 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 11:41:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:59,160 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 11:41:59,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 11:41:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:59,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:59,161 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:59,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:59,371 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:59,371 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 11:41:59,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:59,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647671407] [2020-10-16 11:41:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647671407] [2020-10-16 11:41:59,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231963412] [2020-10-16 11:41:59,446 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 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 11:41:59,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:59,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:59,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:59,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309894888] [2020-10-16 11:41:59,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:59,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:59,538 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 11:41:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:59,937 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-16 11:41:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:59,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:59,939 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:59,939 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:59,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:41:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-16 11:41:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:41:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 11:41:59,942 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 11:41:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:59,943 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 11:41:59,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 11:41:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:59,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:59,943 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:00,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:42:00,153 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 11:42:00,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:00,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004191275] [2020-10-16 11:42:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004191275] [2020-10-16 11:42:00,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857153014] [2020-10-16 11:42:00,230 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 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 11:42:00,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:42:00,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:00,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:00,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:00,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735626813] [2020-10-16 11:42:00,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:00,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:00,335 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 11:42:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,758 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 11:42:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:00,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,760 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:00,760 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:42:00,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:42:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 11:42:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:00,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 11:42:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,765 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:00,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:00,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,765 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:00,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:00,975 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 11:42:00,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:00,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830445131] [2020-10-16 11:42:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830445131] [2020-10-16 11:42:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857216148] [2020-10-16 11:42:01,064 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 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 11:42:01,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:01,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:01,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:01,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:01,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385112717] [2020-10-16 11:42:01,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:01,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:01,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:01,157 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 11:42:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:01,620 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 11:42:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:01,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:01,621 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:42:01,621 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:42:01,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:42:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 11:42:01,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:42:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 11:42:01,624 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 11:42:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:01,625 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 11:42:01,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 11:42:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:01,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:01,626 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 11:42:01,834 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 11:42:01,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447516431] [2020-10-16 11:42:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447516431] [2020-10-16 11:42:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246224158] [2020-10-16 11:42:01,951 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 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 11:42:02,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:02,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:02,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460290264] [2020-10-16 11:42:02,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:02,017 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 11:42:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,220 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 11:42:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:42:02,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,222 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:02,222 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 11:42:02,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:42:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 11:42:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 11:42:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 11:42:02,225 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 11:42:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,225 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 11:42:02,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 11:42:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:02,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,226 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:02,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:42:02,435 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:02,435 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 11:42:02,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:02,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111933965] [2020-10-16 11:42:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111933965] [2020-10-16 11:42:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288762438] [2020-10-16 11:42:02,545 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 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 11:42:02,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:02,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:02,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:02,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002451105] [2020-10-16 11:42:02,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:02,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:02,655 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 11:42:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,945 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 11:42:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:42:02,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,947 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:02,947 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 11:42:02,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:42:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 11:42:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 11:42:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:42:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 11:42:02,952 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 11:42:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,952 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 11:42:02,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 11:42:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:02,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,954 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:42:03,154 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 11:42:03,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293199714] [2020-10-16 11:42:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293199714] [2020-10-16 11:42:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844774524] [2020-10-16 11:42:03,267 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 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 11:42:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:03,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:03,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:03,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457362862] [2020-10-16 11:42:03,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:03,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:03,350 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 11:42:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:03,624 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 11:42:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:03,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:03,626 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:03,626 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:03,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 11:42:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:42:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 11:42:03,629 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 11:42:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:03,630 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 11:42:03,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 11:42:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:03,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:03,630 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 11:42:03,841 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 11:42:03,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282486440] [2020-10-16 11:42:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282486440] [2020-10-16 11:42:03,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877237383] [2020-10-16 11:42:03,962 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 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 11:42:04,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:04,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:04,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667895568] [2020-10-16 11:42:04,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:04,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:04,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:04,060 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 11:42:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:04,386 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 11:42:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:04,390 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:04,391 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:04,391 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:04,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 11:42:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 11:42:04,394 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 11:42:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:04,394 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 11:42:04,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 11:42:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:04,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:04,395 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:04,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:04,603 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 11:42:04,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:04,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889495406] [2020-10-16 11:42:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889495406] [2020-10-16 11:42:04,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362971106] [2020-10-16 11:42:04,710 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 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 11:42:04,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:04,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:04,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64634494] [2020-10-16 11:42:04,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:04,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:04,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:04,781 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 11:42:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:05,108 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 11:42:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:05,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:05,110 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:05,110 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:05,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 11:42:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:05,114 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 11:42:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:05,114 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:05,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:05,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:05,115 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:05,316 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 11:42:05,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471268703] [2020-10-16 11:42:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471268703] [2020-10-16 11:42:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309031693] [2020-10-16 11:42:05,429 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 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 11:42:05,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:05,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:05,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:05,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:05,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:05,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123750504] [2020-10-16 11:42:05,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:05,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:05,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:05,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:05,573 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 11:42:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:05,948 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 11:42:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:05,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:05,949 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:05,949 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:05,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 11:42:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:05,952 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 11:42:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:05,952 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:05,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:05,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:05,953 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:06,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:42:06,156 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 11:42:06,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:06,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014175472] [2020-10-16 11:42:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014175472] [2020-10-16 11:42:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480978512] [2020-10-16 11:42:06,245 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 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 11:42:06,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:06,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:06,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:06,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838792427] [2020-10-16 11:42:06,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:06,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:06,326 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 11:42:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:06,696 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 11:42:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:06,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:06,699 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:06,699 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:06,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 11:42:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 11:42:06,702 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 11:42:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:06,702 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 11:42:06,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 11:42:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:06,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:06,703 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:06,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:06,904 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:06,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 11:42:06,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:06,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426666016] [2020-10-16 11:42:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426666016] [2020-10-16 11:42:06,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563650751] [2020-10-16 11:42:06,991 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 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 11:42:07,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:07,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:07,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:07,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117720955] [2020-10-16 11:42:07,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:07,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:07,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:07,126 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 11:42:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:07,572 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 11:42:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:07,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:07,574 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:07,574 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:07,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 11:42:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:07,578 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 11:42:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:07,578 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:07,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:07,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:07,579 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:07,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:42:07,786 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 11:42:07,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:07,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472821377] [2020-10-16 11:42:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472821377] [2020-10-16 11:42:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303360300] [2020-10-16 11:42:07,907 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 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 11:42:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:08,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:08,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295407128] [2020-10-16 11:42:08,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:08,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:08,018 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 11:42:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:08,470 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:42:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:08,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:08,472 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:08,472 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:08,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 11:42:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 11:42:08,475 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 11:42:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:08,476 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 11:42:08,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 11:42:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:08,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:08,477 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:08,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:42:08,687 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 11:42:08,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:08,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987477983] [2020-10-16 11:42:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987477983] [2020-10-16 11:42:08,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700052811] [2020-10-16 11:42:08,783 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 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 11:42:08,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:08,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:08,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:08,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:08,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266282482] [2020-10-16 11:42:08,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:08,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:08,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:08,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:08,877 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 11:42:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,398 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 11:42:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:09,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,400 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:09,400 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:09,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 11:42:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 11:42:09,403 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 11:42:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,403 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 11:42:09,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 11:42:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:09,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:09,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:42:09,608 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 11:42:09,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:09,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445065704] [2020-10-16 11:42:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:42:09,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:42:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:42:09,628 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:42:09,653 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:42:09,654 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:42:09,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-16 11:42:09,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:42:09 BasicIcfg [2020-10-16 11:42:09,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:42:09,752 INFO L168 Benchmark]: Toolchain (without parser) took 39860.31 ms. Allocated memory was 147.8 MB in the beginning and 400.6 MB in the end (delta: 252.7 MB). Free memory was 101.6 MB in the beginning and 160.1 MB in the end (delta: -58.6 MB). Peak memory consumption was 194.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:42:09,753 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-10-16 11:42:09,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 803.57 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 101.4 MB in the beginning and 164.7 MB in the end (delta: -63.3 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:42:09,754 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.31 ms. Allocated memory is still 204.5 MB. Free memory was 164.7 MB in the beginning and 162.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:42:09,754 INFO L168 Benchmark]: Boogie Preprocessor took 34.28 ms. Allocated memory is still 204.5 MB. Free memory was 162.7 MB in the beginning and 161.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:42:09,755 INFO L168 Benchmark]: RCFGBuilder took 501.85 ms. Allocated memory is still 204.5 MB. Free memory was 161.4 MB in the beginning and 141.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:42:09,755 INFO L168 Benchmark]: TraceAbstraction took 38463.90 ms. Allocated memory was 204.5 MB in the beginning and 400.6 MB in the end (delta: 196.1 MB). Free memory was 140.5 MB in the beginning and 160.1 MB in the end (delta: -19.7 MB). Peak memory consumption was 176.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:42:09,759 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 803.57 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 101.4 MB in the beginning and 164.7 MB in the end (delta: -63.3 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.31 ms. Allocated memory is still 204.5 MB. Free memory was 164.7 MB in the beginning and 162.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.28 ms. Allocated memory is still 204.5 MB. Free memory was 162.7 MB in the beginning and 161.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 501.85 ms. Allocated memory is still 204.5 MB. Free memory was 161.4 MB in the beginning and 141.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 38463.90 ms. Allocated memory was 204.5 MB in the beginning and 400.6 MB in the end (delta: 196.1 MB). Free memory was 140.5 MB in the beginning and 160.1 MB in the end (delta: -19.7 MB). Peak memory consumption was 176.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 488 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 38.2s, OverallIterations: 59, TraceHistogramMax: 5, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 899 SDtfs, 2552 SDslu, 3350 SDs, 0 SdLazy, 3704 SolverSat, 1672 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1776 GetRequests, 634 SyntacticMatches, 53 SemanticMatches, 1089 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 950 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1602 NumberOfCodeBlocks, 1602 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 86797 SizeOfPredicates, 346 NumberOfNonLiveVariables, 5122 ConjunctsInSsa, 562 ConjunctsInUnsatCore, 111 InterpolantComputations, 5 PerfectInterpolantSequences, 0/900 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 proved your program to be incorrect! Received shutdown request...