/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/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 22:34:09,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 22:34:09,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 22:34:09,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 22:34:09,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 22:34:09,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 22:34:09,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 22:34:09,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 22:34:09,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 22:34:09,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 22:34:09,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 22:34:09,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 22:34:09,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 22:34:09,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 22:34:09,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 22:34:09,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 22:34:09,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 22:34:09,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 22:34:09,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 22:34:09,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 22:34:09,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 22:34:09,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 22:34:09,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 22:34:09,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 22:34:09,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 22:34:09,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 22:34:09,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 22:34:09,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 22:34:09,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 22:34:09,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 22:34:09,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 22:34:09,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 22:34:09,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 22:34:09,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 22:34:09,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 22:34:09,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 22:34:09,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 22:34:09,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 22:34:09,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 22:34:09,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 22:34:09,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 22:34:09,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-21 22:34:09,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 22:34:09,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 22:34:09,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 22:34:09,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 22:34:09,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 22:34:09,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 22:34:09,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 22:34:09,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 22:34:09,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 22:34:09,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 22:34:09,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 22:34:09,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 22:34:09,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 22:34:09,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 22:34:09,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 22:34:09,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 22:34:09,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 22:34:09,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 22:34:09,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 22:34:09,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 22:34:09,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 22:34:09,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:34:09,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 22:34:09,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 22:34:09,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 22:34:09,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 22:34:09,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 22:34:09,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 22:34:09,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 22:34:10,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 22:34:10,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 22:34:10,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 22:34:10,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 22:34:10,094 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 22:34:10,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-21 22:34:10,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c17b4eb0/bb6655d7716843a498b3e7ab65050f00/FLAG5bc255959 [2020-10-21 22:34:10,693 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 22:34:10,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-21 22:34:10,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c17b4eb0/bb6655d7716843a498b3e7ab65050f00/FLAG5bc255959 [2020-10-21 22:34:11,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c17b4eb0/bb6655d7716843a498b3e7ab65050f00 [2020-10-21 22:34:11,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 22:34:11,057 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 22:34:11,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 22:34:11,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 22:34:11,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 22:34:11,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@721b7422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11, skipping insertion in model container [2020-10-21 22:34:11,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 22:34:11,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 22:34:11,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:34:11,597 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 22:34:11,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:34:11,718 INFO L208 MainTranslator]: Completed translation [2020-10-21 22:34:11,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11 WrapperNode [2020-10-21 22:34:11,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 22:34:11,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 22:34:11,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 22:34:11,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 22:34:11,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 22:34:11,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 22:34:11,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 22:34:11,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 22:34:11,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 22:34:11,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 22:34:11,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 22:34:11,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 22:34:11,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:34:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 22:34:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 22:34:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 22:34:11,894 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 22:34:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 22:34:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 22:34:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 22:34:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 22:34:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 22:34:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 22:34:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 22:34:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 22:34:11,897 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 22:34:12,268 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 22:34:12,269 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 22:34:12,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:34:12 BoogieIcfgContainer [2020-10-21 22:34:12,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 22:34:12,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 22:34:12,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 22:34:12,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 22:34:12,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 10:34:11" (1/3) ... [2020-10-21 22:34:12,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217508b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:34:12, skipping insertion in model container [2020-10-21 22:34:12,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (2/3) ... [2020-10-21 22:34:12,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217508b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:34:12, skipping insertion in model container [2020-10-21 22:34:12,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:34:12" (3/3) ... [2020-10-21 22:34:12,281 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-10-21 22:34:12,293 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 22:34:12,294 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 22:34:12,301 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 22:34:12,302 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 22:34:12,330 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,331 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,331 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,331 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,333 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,334 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,334 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,334 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,334 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,335 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,335 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,335 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,336 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,336 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,336 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,336 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,336 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,337 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,337 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,337 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,338 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,338 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,338 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,338 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,338 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,342 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,342 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,342 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,342 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,342 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,343 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,347 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,348 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,348 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,348 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,349 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,349 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,351 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 22:34:12,363 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 22:34:12,384 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 22:34:12,384 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 22:34:12,384 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 22:34:12,384 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 22:34:12,384 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 22:34:12,384 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 22:34:12,385 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 22:34:12,385 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 22:34:12,397 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 22:34:12,397 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,399 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,401 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,445 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-21 22:34:12,445 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 22:34:12,451 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-21 22:34:12,454 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-10-21 22:34:14,150 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-21 22:34:14,301 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-21 22:34:14,311 INFO L131 LiptonReduction]: Checked pairs total: 1215 [2020-10-21 22:34:14,312 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-10-21 22:34:14,319 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 22:34:14,331 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 22:34:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 22:34:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 22:34:14,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,341 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash -485169148, now seen corresponding path program 1 times [2020-10-21 22:34:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166713565] [2020-10-21 22:34:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:14,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166713565] [2020-10-21 22:34:14,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:14,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 22:34:14,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209988583] [2020-10-21 22:34:14,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 22:34:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 22:34:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 22:34:14,596 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 22:34:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:14,668 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-21 22:34:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 22:34:14,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 22:34:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:14,684 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:34:14,684 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 22:34:14,686 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 [2020-10-21 22:34:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 22:34:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-21 22:34:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 22:34:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-21 22:34:14,733 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-21 22:34:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:14,734 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-21 22:34:14,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 22:34:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-21 22:34:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:34:14,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 22:34:14,746 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1939234589, now seen corresponding path program 1 times [2020-10-21 22:34:14,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376468674] [2020-10-21 22:34:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:14,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376468674] [2020-10-21 22:34:14,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:14,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:34:14,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096349202] [2020-10-21 22:34:14,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:34:14,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:14,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:34:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:14,920 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-21 22:34:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:14,977 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-21 22:34:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:34:14,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:34:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:14,979 INFO L225 Difference]: With dead ends: 80 [2020-10-21 22:34:14,979 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 22:34:14,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 22:34:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 22:34:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-21 22:34:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 22:34:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-21 22:34:14,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-21 22:34:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:14,992 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-21 22:34:14,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:34:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-21 22:34:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:34:14,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 22:34:14,994 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1904484586, now seen corresponding path program 1 times [2020-10-21 22:34:14,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659007885] [2020-10-21 22:34:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659007885] [2020-10-21 22:34:15,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:15,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:34:15,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62481297] [2020-10-21 22:34:15,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:34:15,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:34:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:15,132 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-21 22:34:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:15,217 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-10-21 22:34:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:34:15,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:34:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:15,219 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:34:15,219 INFO L226 Difference]: Without dead ends: 77 [2020-10-21 22:34:15,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 22:34:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-21 22:34:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-21 22:34:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 22:34:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-21 22:34:15,230 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-21 22:34:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:15,232 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-21 22:34:15,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:34:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-21 22:34:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 22:34:15,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:15,235 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:15,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 22:34:15,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:15,235 INFO L82 PathProgramCache]: Analyzing trace with hash 13298082, now seen corresponding path program 2 times [2020-10-21 22:34:15,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:15,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056137113] [2020-10-21 22:34:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056137113] [2020-10-21 22:34:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088664275] [2020-10-21 22:34:15,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:15,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:15,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:34:15,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:15,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:15,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-21 22:34:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599319389] [2020-10-21 22:34:15,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:34:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:34:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:34:15,543 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-21 22:34:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:15,629 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-21 22:34:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:15,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-21 22:34:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:15,631 INFO L225 Difference]: With dead ends: 101 [2020-10-21 22:34:15,631 INFO L226 Difference]: Without dead ends: 96 [2020-10-21 22:34:15,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-21 22:34:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-21 22:34:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 22:34:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-21 22:34:15,644 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-21 22:34:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:15,645 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-21 22:34:15,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:34:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-21 22:34:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 22:34:15,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:15,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:15,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:15,866 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1090495625, now seen corresponding path program 2 times [2020-10-21 22:34:15,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:15,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234864846] [2020-10-21 22:34:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234864846] [2020-10-21 22:34:15,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298292153] [2020-10-21 22:34:15,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:16,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:16,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:34:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:16,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:16,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-21 22:34:16,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901712946] [2020-10-21 22:34:16,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:34:16,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:34:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,139 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-21 22:34:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,276 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 22:34:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,276 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-21 22:34:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,278 INFO L225 Difference]: With dead ends: 96 [2020-10-21 22:34:16,278 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 22:34:16,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:34:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 22:34:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 22:34:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 22:34:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-21 22:34:16,302 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-21 22:34:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,302 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-21 22:34:16,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:34:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-21 22:34:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:16,520 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash 402914365, now seen corresponding path program 1 times [2020-10-21 22:34:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213097264] [2020-10-21 22:34:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213097264] [2020-10-21 22:34:16,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:16,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:34:16,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374462561] [2020-10-21 22:34:16,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:34:16,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:34:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:34:16,584 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-21 22:34:16,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,686 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 22:34:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:34:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,689 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:34:16,690 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:34:16,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:34:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-21 22:34:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 22:34:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-21 22:34:16,707 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-10-21 22:34:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,708 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-21 22:34:16,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:34:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-21 22:34:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-21 22:34:16,709 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 403029685, now seen corresponding path program 2 times [2020-10-21 22:34:16,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432785704] [2020-10-21 22:34:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432785704] [2020-10-21 22:34:16,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:16,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:34:16,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727676895] [2020-10-21 22:34:16,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:34:16,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:34:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:34:16,768 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 6 states. [2020-10-21 22:34:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,846 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 22:34:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:34:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,848 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:34:16,848 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:34:16,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:34:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 22:34:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 22:34:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-21 22:34:16,856 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-21 22:34:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,857 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-21 22:34:16,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:34:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-21 22:34:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,858 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-21 22:34:16,859 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash 412268739, now seen corresponding path program 3 times [2020-10-21 22:34:16,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617142257] [2020-10-21 22:34:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617142257] [2020-10-21 22:34:16,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406213877] [2020-10-21 22:34:16,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:17,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:17,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:17,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:17,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:17,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-21 22:34:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625195903] [2020-10-21 22:34:17,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:34:17,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:34:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:34:17,152 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-21 22:34:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:17,251 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-21 22:34:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:17,252 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-21 22:34:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:17,253 INFO L225 Difference]: With dead ends: 122 [2020-10-21 22:34:17,253 INFO L226 Difference]: Without dead ends: 117 [2020-10-21 22:34:17,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:34:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-21 22:34:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-21 22:34:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 22:34:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-21 22:34:17,268 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-21 22:34:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:17,269 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-21 22:34:17,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:34:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-21 22:34:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:17,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:17,270 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:17,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,488 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:17,488 INFO L82 PathProgramCache]: Analyzing trace with hash 554398346, now seen corresponding path program 3 times [2020-10-21 22:34:17,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:17,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744289281] [2020-10-21 22:34:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744289281] [2020-10-21 22:34:17,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332390857] [2020-10-21 22:34:17,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:17,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:17,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:17,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:17,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:17,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708595606] [2020-10-21 22:34:17,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:17,709 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-21 22:34:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:17,851 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-10-21 22:34:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:17,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-21 22:34:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:17,853 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:34:17,853 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 22:34:17,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:34:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 22:34:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-21 22:34:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:34:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 22:34:17,863 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-21 22:34:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:17,863 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 22:34:17,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 22:34:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:17,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:17,865 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:18,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:18,067 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash -394647540, now seen corresponding path program 3 times [2020-10-21 22:34:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:18,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536103497] [2020-10-21 22:34:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536103497] [2020-10-21 22:34:18,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074235587] [2020-10-21 22:34:18,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:34:18,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:18,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:18,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:18,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:18,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:18,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965303683] [2020-10-21 22:34:18,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:18,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:18,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:18,335 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 22:34:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:18,525 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-21 22:34:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:18,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:18,526 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:34:18,527 INFO L226 Difference]: Without dead ends: 116 [2020-10-21 22:34:18,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-21 22:34:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-21 22:34:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:34:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 22:34:18,533 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-10-21 22:34:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:18,534 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 22:34:18,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 22:34:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:18,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:18,535 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:18,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 22:34:18,748 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -394532220, now seen corresponding path program 4 times [2020-10-21 22:34:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:18,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759438802] [2020-10-21 22:34:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759438802] [2020-10-21 22:34:18,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533586023] [2020-10-21 22:34:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:18,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:18,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:18,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:18,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:18,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441154706] [2020-10-21 22:34:18,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:18,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:18,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:18,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:18,921 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 22:34:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:19,151 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-10-21 22:34:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:19,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:19,153 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:34:19,153 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 22:34:19,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:34:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 22:34:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-10-21 22:34:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:34:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-21 22:34:19,161 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-10-21 22:34:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:19,161 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-21 22:34:19,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-21 22:34:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:19,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:19,162 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:19,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,375 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash -394528376, now seen corresponding path program 5 times [2020-10-21 22:34:19,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:19,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526895655] [2020-10-21 22:34:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526895655] [2020-10-21 22:34:19,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056569423] [2020-10-21 22:34:19,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:19,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:19,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:19,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:19,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509362080] [2020-10-21 22:34:19,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:19,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:19,575 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 11 states. [2020-10-21 22:34:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:19,708 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-10-21 22:34:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:19,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:19,710 INFO L225 Difference]: With dead ends: 126 [2020-10-21 22:34:19,711 INFO L226 Difference]: Without dead ends: 121 [2020-10-21 22:34:19,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-21 22:34:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-21 22:34:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:34:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-10-21 22:34:19,716 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-10-21 22:34:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:19,716 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-10-21 22:34:19,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-10-21 22:34:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:19,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:19,717 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:19,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,929 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash -390957300, now seen corresponding path program 6 times [2020-10-21 22:34:19,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:19,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791560677] [2020-10-21 22:34:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791560677] [2020-10-21 22:34:20,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351269117] [2020-10-21 22:34:20,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:20,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:20,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:20,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:20,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209304972] [2020-10-21 22:34:20,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:20,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:20,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:20,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:20,118 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 11 states. [2020-10-21 22:34:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:20,276 INFO L93 Difference]: Finished difference Result 127 states and 304 transitions. [2020-10-21 22:34:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:20,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:20,277 INFO L225 Difference]: With dead ends: 127 [2020-10-21 22:34:20,277 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 22:34:20,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 22:34:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-21 22:34:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 22:34:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-10-21 22:34:20,282 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-10-21 22:34:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:20,282 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-10-21 22:34:20,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-10-21 22:34:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:20,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:20,283 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:20,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 22:34:20,485 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash -390953456, now seen corresponding path program 7 times [2020-10-21 22:34:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:20,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491485020] [2020-10-21 22:34:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491485020] [2020-10-21 22:34:20,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520413354] [2020-10-21 22:34:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:20,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:20,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:20,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:20,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587273788] [2020-10-21 22:34:20,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:20,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:20,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:20,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:20,671 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand 11 states. [2020-10-21 22:34:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:20,889 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-10-21 22:34:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:20,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:20,891 INFO L225 Difference]: With dead ends: 141 [2020-10-21 22:34:20,891 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 22:34:20,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:34:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 22:34:20,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-10-21 22:34:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 22:34:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-10-21 22:34:20,896 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-10-21 22:34:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:20,896 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-10-21 22:34:20,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-10-21 22:34:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:20,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:20,897 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:21,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:21,103 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash -390838136, now seen corresponding path program 8 times [2020-10-21 22:34:21,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:21,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597748431] [2020-10-21 22:34:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597748431] [2020-10-21 22:34:21,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809253526] [2020-10-21 22:34:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:21,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:21,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:21,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:21,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879966831] [2020-10-21 22:34:21,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:21,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:21,332 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand 11 states. [2020-10-21 22:34:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:21,518 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-21 22:34:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:21,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:21,519 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:34:21,519 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 22:34:21,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 22:34:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-10-21 22:34:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 22:34:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-21 22:34:21,527 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-21 22:34:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:21,527 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-21 22:34:21,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-21 22:34:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:21,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:21,528 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:21,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 22:34:21,739 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash -104542782, now seen corresponding path program 4 times [2020-10-21 22:34:21,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:21,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174703225] [2020-10-21 22:34:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174703225] [2020-10-21 22:34:21,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564406865] [2020-10-21 22:34:21,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:21,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:21,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:21,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:21,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:21,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 22:34:21,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004534297] [2020-10-21 22:34:21,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:34:21,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:21,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:34:21,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:34:21,961 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-21 22:34:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:22,088 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-21 22:34:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:22,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-21 22:34:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:22,089 INFO L225 Difference]: With dead ends: 143 [2020-10-21 22:34:22,089 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 22:34:22,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:34:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 22:34:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-21 22:34:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 22:34:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 22:34:22,094 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-21 22:34:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 22:34:22,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:34:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 22:34:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:22,095 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:22,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 22:34:22,296 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 6503895, now seen corresponding path program 4 times [2020-10-21 22:34:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:22,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182007693] [2020-10-21 22:34:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182007693] [2020-10-21 22:34:22,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861152526] [2020-10-21 22:34:22,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:22,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:22,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:22,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:22,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:22,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084744786] [2020-10-21 22:34:22,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:22,549 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-21 22:34:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:22,679 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-10-21 22:34:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:22,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-21 22:34:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:22,681 INFO L225 Difference]: With dead ends: 147 [2020-10-21 22:34:22,681 INFO L226 Difference]: Without dead ends: 141 [2020-10-21 22:34:22,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:34:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-21 22:34:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-21 22:34:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 22:34:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 22:34:22,686 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-21 22:34:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:22,687 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 22:34:22,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 22:34:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:22,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:22,688 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:22,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 22:34:22,899 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash 650737181, now seen corresponding path program 9 times [2020-10-21 22:34:22,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:22,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213450639] [2020-10-21 22:34:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213450639] [2020-10-21 22:34:22,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250457868] [2020-10-21 22:34:22,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:23,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:23,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:23,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:23,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:23,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:23,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:23,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867459327] [2020-10-21 22:34:23,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:23,122 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-21 22:34:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:23,358 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-10-21 22:34:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:23,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:23,360 INFO L225 Difference]: With dead ends: 152 [2020-10-21 22:34:23,360 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 22:34:23,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 22:34:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-21 22:34:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-10-21 22:34:23,366 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-10-21 22:34:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:23,366 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-10-21 22:34:23,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-10-21 22:34:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:23,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:23,367 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:23,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 22:34:23,581 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash 650852501, now seen corresponding path program 10 times [2020-10-21 22:34:23,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:23,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336374373] [2020-10-21 22:34:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:23,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336374373] [2020-10-21 22:34:23,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616565805] [2020-10-21 22:34:23,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:23,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:23,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:24,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:24,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 22:34:24,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065856273] [2020-10-21 22:34:24,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:34:24,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:24,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:34:24,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=125, Unknown=1, NotChecked=0, Total=182 [2020-10-21 22:34:24,910 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 14 states. [2020-10-21 22:34:27,111 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-10-21 22:34:29,387 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-21 22:34:33,576 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-21 22:34:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:48,335 INFO L93 Difference]: Finished difference Result 168 states and 398 transitions. [2020-10-21 22:34:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-21 22:34:48,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-10-21 22:34:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:48,341 INFO L225 Difference]: With dead ends: 168 [2020-10-21 22:34:48,341 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 22:34:48,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=195, Invalid=403, Unknown=2, NotChecked=0, Total=600 [2020-10-21 22:34:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 22:34:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 112. [2020-10-21 22:34:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-10-21 22:34:48,350 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-10-21 22:34:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:48,351 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-10-21 22:34:48,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:34:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-10-21 22:34:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:48,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:48,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:48,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:48,554 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash 650856345, now seen corresponding path program 11 times [2020-10-21 22:34:48,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:48,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308978879] [2020-10-21 22:34:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:48,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308978879] [2020-10-21 22:34:48,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212152052] [2020-10-21 22:34:48,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:48,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:48,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:48,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:48,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:48,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753762241] [2020-10-21 22:34:48,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:48,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:48,769 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 13 states. [2020-10-21 22:34:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:49,054 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-10-21 22:34:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:49,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:49,056 INFO L225 Difference]: With dead ends: 148 [2020-10-21 22:34:49,056 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 22:34:49,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 22:34:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-21 22:34:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-21 22:34:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-10-21 22:34:49,061 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-10-21 22:34:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:49,061 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-10-21 22:34:49,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-10-21 22:34:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:49,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:49,063 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:49,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:49,274 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:49,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:49,274 INFO L82 PathProgramCache]: Analyzing trace with hash 654427421, now seen corresponding path program 12 times [2020-10-21 22:34:49,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:49,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896486454] [2020-10-21 22:34:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:49,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896486454] [2020-10-21 22:34:49,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667820196] [2020-10-21 22:34:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:49,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:49,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:49,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:49,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:49,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:49,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387615878] [2020-10-21 22:34:49,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:49,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:49,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:49,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:49,499 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 13 states. [2020-10-21 22:34:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:49,875 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-10-21 22:34:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:49,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:49,882 INFO L225 Difference]: With dead ends: 167 [2020-10-21 22:34:49,882 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 22:34:49,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:34:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 22:34:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-10-21 22:34:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-10-21 22:34:49,888 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-10-21 22:34:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:49,888 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-10-21 22:34:49,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-10-21 22:34:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:49,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:49,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:50,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:50,100 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 654431265, now seen corresponding path program 13 times [2020-10-21 22:34:50,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:50,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416638728] [2020-10-21 22:34:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:50,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416638728] [2020-10-21 22:34:50,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092144451] [2020-10-21 22:34:50,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:50,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:50,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:50,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:50,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:50,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:50,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859071114] [2020-10-21 22:34:50,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:50,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:50,343 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 13 states. [2020-10-21 22:34:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:50,712 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-10-21 22:34:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:34:50,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:50,714 INFO L225 Difference]: With dead ends: 177 [2020-10-21 22:34:50,714 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 22:34:50,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:34:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 22:34:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-10-21 22:34:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-10-21 22:34:50,726 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-10-21 22:34:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:50,726 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-10-21 22:34:50,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-10-21 22:34:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:50,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:50,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:50,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 22:34:50,943 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash 654546585, now seen corresponding path program 14 times [2020-10-21 22:34:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:50,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888257879] [2020-10-21 22:34:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:51,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888257879] [2020-10-21 22:34:51,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56704249] [2020-10-21 22:34:51,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:51,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:51,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:51,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:51,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:51,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:51,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462471257] [2020-10-21 22:34:51,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:51,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:51,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:51,269 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand 13 states. [2020-10-21 22:34:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:51,640 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-10-21 22:34:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:51,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:51,643 INFO L225 Difference]: With dead ends: 165 [2020-10-21 22:34:51,644 INFO L226 Difference]: Without dead ends: 160 [2020-10-21 22:34:51,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-21 22:34:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-10-21 22:34:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-21 22:34:51,651 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-10-21 22:34:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:51,651 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-21 22:34:51,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-21 22:34:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:51,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:51,652 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:51,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 22:34:51,868 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:51,868 INFO L82 PathProgramCache]: Analyzing trace with hash 765249941, now seen corresponding path program 15 times [2020-10-21 22:34:51,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:51,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225759877] [2020-10-21 22:34:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:51,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225759877] [2020-10-21 22:34:51,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744308273] [2020-10-21 22:34:51,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:52,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:52,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:52,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:52,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:52,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:52,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:52,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519202193] [2020-10-21 22:34:52,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:52,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:52,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:52,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:52,127 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-21 22:34:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:52,379 INFO L93 Difference]: Finished difference Result 158 states and 378 transitions. [2020-10-21 22:34:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:52,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:52,381 INFO L225 Difference]: With dead ends: 158 [2020-10-21 22:34:52,381 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 22:34:52,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 22:34:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2020-10-21 22:34:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-21 22:34:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-10-21 22:34:52,387 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-10-21 22:34:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:52,387 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-10-21 22:34:52,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-10-21 22:34:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:52,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:52,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:52,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 22:34:52,599 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash 765253785, now seen corresponding path program 16 times [2020-10-21 22:34:52,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:52,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315020777] [2020-10-21 22:34:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:52,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315020777] [2020-10-21 22:34:52,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377890184] [2020-10-21 22:34:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:52,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:52,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:52,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:52,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:52,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:52,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:52,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916317413] [2020-10-21 22:34:52,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:52,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:52,826 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand 13 states. [2020-10-21 22:34:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:53,176 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2020-10-21 22:34:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:53,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:53,178 INFO L225 Difference]: With dead ends: 185 [2020-10-21 22:34:53,178 INFO L226 Difference]: Without dead ends: 177 [2020-10-21 22:34:53,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:53,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-21 22:34:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2020-10-21 22:34:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 22:34:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-10-21 22:34:53,183 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-10-21 22:34:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:53,185 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-10-21 22:34:53,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-10-21 22:34:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:53,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:53,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:53,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 22:34:53,399 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:53,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:53,399 INFO L82 PathProgramCache]: Analyzing trace with hash 765369105, now seen corresponding path program 17 times [2020-10-21 22:34:53,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:53,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860178268] [2020-10-21 22:34:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:53,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860178268] [2020-10-21 22:34:53,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928001993] [2020-10-21 22:34:53,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:53,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:53,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:53,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:53,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:53,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:53,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493842170] [2020-10-21 22:34:53,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:53,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:53,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:53,620 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand 13 states. [2020-10-21 22:34:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:54,028 INFO L93 Difference]: Finished difference Result 194 states and 459 transitions. [2020-10-21 22:34:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:34:54,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:54,030 INFO L225 Difference]: With dead ends: 194 [2020-10-21 22:34:54,030 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 22:34:54,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:34:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 22:34:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2020-10-21 22:34:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-21 22:34:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-10-21 22:34:54,036 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-10-21 22:34:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:54,037 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-10-21 22:34:54,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-10-21 22:34:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:54,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:54,038 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:54,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 22:34:54,251 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:54,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:54,251 INFO L82 PathProgramCache]: Analyzing trace with hash 765372949, now seen corresponding path program 18 times [2020-10-21 22:34:54,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:54,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963444984] [2020-10-21 22:34:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963444984] [2020-10-21 22:34:54,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289852394] [2020-10-21 22:34:54,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:54,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:54,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:54,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:54,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:54,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731109596] [2020-10-21 22:34:54,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:54,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:54,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:54,504 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 13 states. [2020-10-21 22:34:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:54,856 INFO L93 Difference]: Finished difference Result 172 states and 404 transitions. [2020-10-21 22:34:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:54,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:54,858 INFO L225 Difference]: With dead ends: 172 [2020-10-21 22:34:54,858 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 22:34:54,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:34:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 22:34:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-10-21 22:34:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-21 22:34:54,863 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-21 22:34:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:54,863 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-21 22:34:54,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-21 22:34:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:54,864 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:55,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:55,075 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1054169251, now seen corresponding path program 5 times [2020-10-21 22:34:55,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:55,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211095596] [2020-10-21 22:34:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:55,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211095596] [2020-10-21 22:34:55,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437162967] [2020-10-21 22:34:55,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:55,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:34:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:55,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:55,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:55,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:55,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:34:55,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143103098] [2020-10-21 22:34:55,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:34:55,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:55,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:34:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:34:55,433 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-21 22:34:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:55,649 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-21 22:34:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:55,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-21 22:34:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:55,651 INFO L225 Difference]: With dead ends: 164 [2020-10-21 22:34:55,652 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 22:34:55,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:34:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 22:34:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-21 22:34:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-21 22:34:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-21 22:34:55,657 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-21 22:34:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:55,658 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-21 22:34:55,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:34:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-21 22:34:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:55,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:55,659 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:55,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 22:34:55,872 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash 201645098, now seen corresponding path program 5 times [2020-10-21 22:34:55,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:55,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194471380] [2020-10-21 22:34:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:55,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194471380] [2020-10-21 22:34:55,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698876848] [2020-10-21 22:34:55,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:34:56,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:34:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:56,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:56,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:56,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:56,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:56,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:34:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030557275] [2020-10-21 22:34:56,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:34:56,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:34:56,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:34:56,163 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-21 22:34:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:56,363 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-10-21 22:34:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:56,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-21 22:34:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:56,365 INFO L225 Difference]: With dead ends: 173 [2020-10-21 22:34:56,365 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 22:34:56,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 22:34:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-10-21 22:34:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:34:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:34:56,375 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-21 22:34:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:56,375 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:34:56,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:34:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:34:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:34:56,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:56,376 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:56,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 22:34:56,588 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1302074836, now seen corresponding path program 19 times [2020-10-21 22:34:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:56,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555228739] [2020-10-21 22:34:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:56,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555228739] [2020-10-21 22:34:56,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056990256] [2020-10-21 22:34:56,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:56,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:56,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:56,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:56,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:56,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:34:56,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000570982] [2020-10-21 22:34:56,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:34:56,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:56,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:34:56,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:34:56,857 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:34:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:57,190 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 22:34:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:57,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:34:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:57,193 INFO L225 Difference]: With dead ends: 183 [2020-10-21 22:34:57,193 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 22:34:57,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 22:34:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 22:34:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:34:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 22:34:57,198 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 22:34:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:57,199 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 22:34:57,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:34:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 22:34:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:34:57,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:57,199 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:57,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:57,410 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:57,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1301959516, now seen corresponding path program 20 times [2020-10-21 22:34:57,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:57,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170833324] [2020-10-21 22:34:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:57,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170833324] [2020-10-21 22:34:57,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18323660] [2020-10-21 22:34:57,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:57,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:57,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:57,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:57,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:57,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:58,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:58,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:34:58,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122527993] [2020-10-21 22:34:58,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:34:58,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:34:58,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:34:58,861 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 22:35:03,063 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 22:35:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:18,005 INFO L93 Difference]: Finished difference Result 204 states and 484 transitions. [2020-10-21 22:35:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 22:35:18,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:35:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:18,040 INFO L225 Difference]: With dead ends: 204 [2020-10-21 22:35:18,040 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 22:35:18,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=260, Invalid=550, Unknown=2, NotChecked=0, Total=812 [2020-10-21 22:35:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 22:35:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2020-10-21 22:35:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:35:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-10-21 22:35:18,045 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-10-21 22:35:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:18,046 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-10-21 22:35:18,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:35:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-10-21 22:35:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:18,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:18,049 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:18,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:18,263 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1301955672, now seen corresponding path program 21 times [2020-10-21 22:35:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:18,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23126893] [2020-10-21 22:35:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:18,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23126893] [2020-10-21 22:35:18,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885942774] [2020-10-21 22:35:18,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:18,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:35:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:18,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:18,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:18,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373242799] [2020-10-21 22:35:18,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:18,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:18,529 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 15 states. [2020-10-21 22:35:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:18,860 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-10-21 22:35:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:35:18,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:35:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:18,862 INFO L225 Difference]: With dead ends: 184 [2020-10-21 22:35:18,862 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 22:35:18,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:35:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 22:35:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-21 22:35:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 22:35:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-10-21 22:35:18,867 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-10-21 22:35:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:18,867 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-10-21 22:35:18,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-10-21 22:35:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:18,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:18,868 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:19,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 22:35:19,070 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:19,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1298384596, now seen corresponding path program 22 times [2020-10-21 22:35:19,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:19,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945516646] [2020-10-21 22:35:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:19,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945516646] [2020-10-21 22:35:19,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586560477] [2020-10-21 22:35:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:19,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:35:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:19,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:35:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:19,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:19,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:19,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980916472] [2020-10-21 22:35:19,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:19,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:19,385 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 15 states. [2020-10-21 22:35:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:19,968 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-10-21 22:35:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:35:19,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:35:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:19,971 INFO L225 Difference]: With dead ends: 207 [2020-10-21 22:35:19,971 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 22:35:19,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:35:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 22:35:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-10-21 22:35:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:35:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:35:19,976 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:35:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:19,976 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:35:19,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:35:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:19,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:19,977 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:20,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:20,191 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1298380752, now seen corresponding path program 23 times [2020-10-21 22:35:20,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:20,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657041891] [2020-10-21 22:35:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:20,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657041891] [2020-10-21 22:35:20,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522524267] [2020-10-21 22:35:20,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:20,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:35:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:22,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:28,725 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2020-10-21 22:35:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:28,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:28,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:35:28,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245246986] [2020-10-21 22:35:28,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:35:28,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:28,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:35:28,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=168, Unknown=2, NotChecked=0, Total=240 [2020-10-21 22:35:28,728 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 16 states. [2020-10-21 22:35:32,858 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-21 22:35:37,083 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-21 22:35:51,884 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 22:36:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:21,170 INFO L93 Difference]: Finished difference Result 229 states and 545 transitions. [2020-10-21 22:36:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:36:21,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:36:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:21,206 INFO L225 Difference]: With dead ends: 229 [2020-10-21 22:36:21,206 INFO L226 Difference]: Without dead ends: 219 [2020-10-21 22:36:21,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=318, Invalid=732, Unknown=6, NotChecked=0, Total=1056 [2020-10-21 22:36:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-21 22:36:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 131. [2020-10-21 22:36:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:36:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 22:36:21,211 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 22:36:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:21,211 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 22:36:21,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:36:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 22:36:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:21,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:21,212 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:21,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 22:36:21,423 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1298265432, now seen corresponding path program 24 times [2020-10-21 22:36:21,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:21,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259847920] [2020-10-21 22:36:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259847920] [2020-10-21 22:36:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446734740] [2020-10-21 22:36:21,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:21,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:36:21,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:21,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:36:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:21,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:21,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:21,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128353448] [2020-10-21 22:36:21,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:21,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:21,759 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 15 states. [2020-10-21 22:36:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:22,319 INFO L93 Difference]: Finished difference Result 204 states and 491 transitions. [2020-10-21 22:36:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:36:22,320 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:22,321 INFO L225 Difference]: With dead ends: 204 [2020-10-21 22:36:22,321 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 22:36:22,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-21 22:36:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 22:36:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2020-10-21 22:36:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-21 22:36:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 316 transitions. [2020-10-21 22:36:22,326 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 316 transitions. Word has length 13 [2020-10-21 22:36:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:22,327 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 316 transitions. [2020-10-21 22:36:22,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 316 transitions. [2020-10-21 22:36:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:22,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:22,328 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:22,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:22,538 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:22,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1187562076, now seen corresponding path program 25 times [2020-10-21 22:36:22,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:22,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517719546] [2020-10-21 22:36:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:22,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517719546] [2020-10-21 22:36:22,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117845235] [2020-10-21 22:36:22,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:22,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:22,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:36:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:22,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:22,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:22,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995506493] [2020-10-21 22:36:22,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:22,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:22,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:22,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:22,775 INFO L87 Difference]: Start difference. First operand 128 states and 316 transitions. Second operand 15 states. [2020-10-21 22:36:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:23,315 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-10-21 22:36:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:36:23,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:23,316 INFO L225 Difference]: With dead ends: 203 [2020-10-21 22:36:23,316 INFO L226 Difference]: Without dead ends: 198 [2020-10-21 22:36:23,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-21 22:36:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-21 22:36:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2020-10-21 22:36:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 22:36:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 337 transitions. [2020-10-21 22:36:23,321 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 337 transitions. Word has length 13 [2020-10-21 22:36:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:23,321 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 337 transitions. [2020-10-21 22:36:23,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 337 transitions. [2020-10-21 22:36:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:23,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:23,322 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:23,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 22:36:23,523 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1187558232, now seen corresponding path program 26 times [2020-10-21 22:36:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:23,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904801173] [2020-10-21 22:36:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904801173] [2020-10-21 22:36:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202083646] [2020-10-21 22:36:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:23,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:36:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:23,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:23,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:36:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:23,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:23,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:23,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262483596] [2020-10-21 22:36:23,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:23,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:23,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:23,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:23,835 INFO L87 Difference]: Start difference. First operand 133 states and 337 transitions. Second operand 15 states. [2020-10-21 22:36:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:24,484 INFO L93 Difference]: Finished difference Result 204 states and 494 transitions. [2020-10-21 22:36:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:36:24,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:24,487 INFO L225 Difference]: With dead ends: 204 [2020-10-21 22:36:24,487 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 22:36:24,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:36:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 22:36:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 132. [2020-10-21 22:36:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:36:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:36:24,492 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:36:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:24,492 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:36:24,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:36:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:24,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:24,493 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:24,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 22:36:24,699 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1187442912, now seen corresponding path program 27 times [2020-10-21 22:36:24,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:24,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856378496] [2020-10-21 22:36:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:24,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856378496] [2020-10-21 22:36:24,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224764055] [2020-10-21 22:36:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:24,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 22:36:24,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:24,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:24,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:36:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:24,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:24,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:24,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386235251] [2020-10-21 22:36:24,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:24,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:24,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:24,932 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:36:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:25,547 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2020-10-21 22:36:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:36:25,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:25,550 INFO L225 Difference]: With dead ends: 221 [2020-10-21 22:36:25,550 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 22:36:25,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:36:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 22:36:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-10-21 22:36:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:36:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-10-21 22:36:25,555 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 13 [2020-10-21 22:36:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:25,555 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-10-21 22:36:25,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-10-21 22:36:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:25,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:25,556 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:25,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 22:36:25,767 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1187439068, now seen corresponding path program 28 times [2020-10-21 22:36:25,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:25,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268976477] [2020-10-21 22:36:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268976477] [2020-10-21 22:36:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273129356] [2020-10-21 22:36:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:25,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:36:25,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:25,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:25,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:36:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:25,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:25,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970603674] [2020-10-21 22:36:25,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:26,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:26,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:26,000 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 15 states. [2020-10-21 22:36:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:26,542 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2020-10-21 22:36:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:36:26,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:26,545 INFO L225 Difference]: With dead ends: 211 [2020-10-21 22:36:26,545 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 22:36:26,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:36:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 22:36:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-10-21 22:36:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:36:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:36:26,552 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:36:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:26,553 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:36:26,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:36:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:26,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:26,554 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:26,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 22:36:26,755 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1183864148, now seen corresponding path program 29 times [2020-10-21 22:36:26,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:26,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822218870] [2020-10-21 22:36:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:26,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822218870] [2020-10-21 22:36:26,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203277205] [2020-10-21 22:36:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:26,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:36:26,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:26,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:26,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:36:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:27,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:27,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:27,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866841685] [2020-10-21 22:36:27,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:27,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:27,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:27,042 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:36:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:27,764 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-10-21 22:36:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:36:27,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:27,766 INFO L225 Difference]: With dead ends: 210 [2020-10-21 22:36:27,766 INFO L226 Difference]: Without dead ends: 205 [2020-10-21 22:36:27,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:36:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-21 22:36:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2020-10-21 22:36:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 22:36:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-10-21 22:36:27,770 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-10-21 22:36:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:27,770 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-10-21 22:36:27,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-10-21 22:36:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:27,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:27,771 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:27,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 22:36:27,972 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2047031252, now seen corresponding path program 30 times [2020-10-21 22:36:27,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:27,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206717131] [2020-10-21 22:36:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:28,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206717131] [2020-10-21 22:36:28,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783009247] [2020-10-21 22:36:28,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:28,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:36:28,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:28,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:28,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:36:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:28,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:28,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:28,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308072883] [2020-10-21 22:36:28,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:28,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:28,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:28,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:28,208 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 15 states. [2020-10-21 22:36:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:28,533 INFO L93 Difference]: Finished difference Result 189 states and 452 transitions. [2020-10-21 22:36:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:36:28,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:28,536 INFO L225 Difference]: With dead ends: 189 [2020-10-21 22:36:28,536 INFO L226 Difference]: Without dead ends: 184 [2020-10-21 22:36:28,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:36:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-21 22:36:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2020-10-21 22:36:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 22:36:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 22:36:28,540 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 22:36:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:28,540 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 22:36:28,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 22:36:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:28,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:28,541 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:28,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 22:36:28,752 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:28,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2047027408, now seen corresponding path program 31 times [2020-10-21 22:36:28,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:28,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61806259] [2020-10-21 22:36:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:28,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61806259] [2020-10-21 22:36:28,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118611767] [2020-10-21 22:36:28,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:29,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:36:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:29,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:29,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:36:29,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144401956] [2020-10-21 22:36:29,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:36:29,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:36:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:36:29,054 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 22:36:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:29,729 INFO L93 Difference]: Finished difference Result 218 states and 521 transitions. [2020-10-21 22:36:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:36:29,730 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:36:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:29,732 INFO L225 Difference]: With dead ends: 218 [2020-10-21 22:36:29,732 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 22:36:29,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-21 22:36:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 22:36:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 134. [2020-10-21 22:36:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 22:36:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-10-21 22:36:29,737 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-10-21 22:36:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:29,737 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-10-21 22:36:29,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:36:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-10-21 22:36:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:29,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:29,738 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:29,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 22:36:29,950 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:29,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2046912088, now seen corresponding path program 32 times [2020-10-21 22:36:29,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:29,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014846122] [2020-10-21 22:36:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:30,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014846122] [2020-10-21 22:36:30,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067875516] [2020-10-21 22:36:30,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:30,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:36:30,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:30,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:30,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:30,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:36:33,698 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-21 22:36:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:33,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:33,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:36:33,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934933514] [2020-10-21 22:36:33,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:36:33,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:36:33,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:36:33,700 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 16 states. [2020-10-21 22:36:35,461 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-21 22:37:13,890 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-21 22:37:54,445 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-21 22:38:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:02,574 INFO L93 Difference]: Finished difference Result 256 states and 606 transitions. [2020-10-21 22:38:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 22:38:02,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:38:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:02,612 INFO L225 Difference]: With dead ends: 256 [2020-10-21 22:38:02,613 INFO L226 Difference]: Without dead ends: 248 [2020-10-21 22:38:02,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=401, Invalid=985, Unknown=20, NotChecked=0, Total=1406 [2020-10-21 22:38:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-21 22:38:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 137. [2020-10-21 22:38:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-21 22:38:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-10-21 22:38:02,616 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 13 [2020-10-21 22:38:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:02,617 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-10-21 22:38:02,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:38:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-10-21 22:38:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:02,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:02,618 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:02,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:02,820 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:02,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2046908244, now seen corresponding path program 33 times [2020-10-21 22:38:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:02,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154884567] [2020-10-21 22:38:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:02,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154884567] [2020-10-21 22:38:02,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124342587] [2020-10-21 22:38:02,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:02,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 22:38:02,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:03,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:03,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:03,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:03,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163252791] [2020-10-21 22:38:03,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:03,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:03,096 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 15 states. [2020-10-21 22:38:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:03,853 INFO L93 Difference]: Finished difference Result 234 states and 555 transitions. [2020-10-21 22:38:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:03,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:03,860 INFO L225 Difference]: With dead ends: 234 [2020-10-21 22:38:03,860 INFO L226 Difference]: Without dead ends: 226 [2020-10-21 22:38:03,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 22:38:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-21 22:38:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 135. [2020-10-21 22:38:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 22:38:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-21 22:38:03,866 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-21 22:38:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:03,866 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-21 22:38:03,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-21 22:38:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:03,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:03,867 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:04,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 22:38:04,073 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2043337168, now seen corresponding path program 34 times [2020-10-21 22:38:04,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:04,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053332991] [2020-10-21 22:38:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:04,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053332991] [2020-10-21 22:38:04,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682480135] [2020-10-21 22:38:04,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:04,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:38:04,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:04,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:04,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:04,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:04,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929779512] [2020-10-21 22:38:04,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:04,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:04,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:04,319 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-21 22:38:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:04,978 INFO L93 Difference]: Finished difference Result 238 states and 569 transitions. [2020-10-21 22:38:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:04,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:04,979 INFO L225 Difference]: With dead ends: 238 [2020-10-21 22:38:04,980 INFO L226 Difference]: Without dead ends: 230 [2020-10-21 22:38:04,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-21 22:38:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2020-10-21 22:38:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 22:38:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 22:38:04,984 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 22:38:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:04,984 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 22:38:04,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 22:38:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:04,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:04,985 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:05,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:05,186 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -2043333324, now seen corresponding path program 35 times [2020-10-21 22:38:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:05,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115762923] [2020-10-21 22:38:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:05,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115762923] [2020-10-21 22:38:05,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197797168] [2020-10-21 22:38:05,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:05,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:38:05,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:05,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:05,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:05,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:05,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:05,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611409096] [2020-10-21 22:38:05,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:05,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:05,445 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 22:38:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:06,071 INFO L93 Difference]: Finished difference Result 239 states and 572 transitions. [2020-10-21 22:38:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:06,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:06,073 INFO L225 Difference]: With dead ends: 239 [2020-10-21 22:38:06,073 INFO L226 Difference]: Without dead ends: 231 [2020-10-21 22:38:06,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-21 22:38:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 132. [2020-10-21 22:38:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:38:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 326 transitions. [2020-10-21 22:38:06,079 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 326 transitions. Word has length 13 [2020-10-21 22:38:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:06,080 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 326 transitions. [2020-10-21 22:38:06,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 326 transitions. [2020-10-21 22:38:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:06,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:06,081 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:06,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 22:38:06,293 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2043218004, now seen corresponding path program 36 times [2020-10-21 22:38:06,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:06,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935283995] [2020-10-21 22:38:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:06,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935283995] [2020-10-21 22:38:06,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033464798] [2020-10-21 22:38:06,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:06,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:38:06,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:06,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:06,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:06,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:06,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513657793] [2020-10-21 22:38:06,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:06,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:06,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:06,608 INFO L87 Difference]: Start difference. First operand 132 states and 326 transitions. Second operand 15 states. [2020-10-21 22:38:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:07,236 INFO L93 Difference]: Finished difference Result 228 states and 537 transitions. [2020-10-21 22:38:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:38:07,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:07,238 INFO L225 Difference]: With dead ends: 228 [2020-10-21 22:38:07,238 INFO L226 Difference]: Without dead ends: 220 [2020-10-21 22:38:07,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:38:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-21 22:38:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 130. [2020-10-21 22:38:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-21 22:38:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-21 22:38:07,244 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-21 22:38:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:07,245 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-21 22:38:07,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-21 22:38:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:07,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:07,246 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:07,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:07,456 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:07,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:07,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1680463390, now seen corresponding path program 6 times [2020-10-21 22:38:07,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:07,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374206802] [2020-10-21 22:38:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:07,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374206802] [2020-10-21 22:38:07,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894783626] [2020-10-21 22:38:07,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:07,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 22:38:07,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:07,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:07,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:07,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:07,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-21 22:38:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914605419] [2020-10-21 22:38:07,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:38:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:38:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:38:07,807 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-21 22:38:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:08,037 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-21 22:38:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:38:08,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-21 22:38:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:08,040 INFO L225 Difference]: With dead ends: 185 [2020-10-21 22:38:08,040 INFO L226 Difference]: Without dead ends: 180 [2020-10-21 22:38:08,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:38:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-21 22:38:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-21 22:38:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-21 22:38:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-21 22:38:08,045 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-21 22:38:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:08,045 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-21 22:38:08,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:38:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-21 22:38:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:08,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:08,046 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:08,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 22:38:08,258 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:08,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1956055095, now seen corresponding path program 6 times [2020-10-21 22:38:08,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:08,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339629177] [2020-10-21 22:38:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:08,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339629177] [2020-10-21 22:38:08,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717736586] [2020-10-21 22:38:08,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:08,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 22:38:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:08,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:08,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 22:38:08,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528293310] [2020-10-21 22:38:08,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:38:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:38:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:38:08,621 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-21 22:38:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:08,893 INFO L93 Difference]: Finished difference Result 199 states and 474 transitions. [2020-10-21 22:38:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:38:08,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-21 22:38:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:08,895 INFO L225 Difference]: With dead ends: 199 [2020-10-21 22:38:08,896 INFO L226 Difference]: Without dead ends: 193 [2020-10-21 22:38:08,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-21 22:38:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-21 22:38:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2020-10-21 22:38:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-21 22:38:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-21 22:38:08,900 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-21 22:38:08,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:08,900 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-21 22:38:08,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:38:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-21 22:38:08,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:08,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:08,901 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:09,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 22:38:09,102 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1709705219, now seen corresponding path program 37 times [2020-10-21 22:38:09,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:09,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464679104] [2020-10-21 22:38:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:09,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464679104] [2020-10-21 22:38:09,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995507589] [2020-10-21 22:38:09,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:09,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:09,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:09,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:09,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 22:38:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751004845] [2020-10-21 22:38:09,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:38:09,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:38:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:38:09,426 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-21 22:38:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:09,900 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-10-21 22:38:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:38:09,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-21 22:38:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:09,902 INFO L225 Difference]: With dead ends: 214 [2020-10-21 22:38:09,902 INFO L226 Difference]: Without dead ends: 209 [2020-10-21 22:38:09,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-21 22:38:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-21 22:38:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 150. [2020-10-21 22:38:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-21 22:38:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 377 transitions. [2020-10-21 22:38:09,908 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 377 transitions. Word has length 14 [2020-10-21 22:38:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:09,908 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 377 transitions. [2020-10-21 22:38:09,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:38:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 377 transitions. [2020-10-21 22:38:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:09,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:09,909 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:10,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 22:38:10,123 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1709589899, now seen corresponding path program 38 times [2020-10-21 22:38:10,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:10,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166020462] [2020-10-21 22:38:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:10,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166020462] [2020-10-21 22:38:10,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482799759] [2020-10-21 22:38:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:10,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:38:10,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:10,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:10,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:10,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:14,553 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-10-21 22:38:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:14,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:14,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-21 22:38:14,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699169704] [2020-10-21 22:38:14,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 22:38:14,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:14,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 22:38:14,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-21 22:38:14,556 INFO L87 Difference]: Start difference. First operand 150 states and 377 transitions. Second operand 18 states. [2020-10-21 22:38:18,451 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 22:38:25,055 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-21 22:38:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:40,818 INFO L93 Difference]: Finished difference Result 243 states and 576 transitions. [2020-10-21 22:38:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:38:40,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-21 22:38:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:40,825 INFO L225 Difference]: With dead ends: 243 [2020-10-21 22:38:40,825 INFO L226 Difference]: Without dead ends: 238 [2020-10-21 22:38:40,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=352, Invalid=768, Unknown=2, NotChecked=0, Total=1122 [2020-10-21 22:38:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-21 22:38:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 150. [2020-10-21 22:38:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-21 22:38:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 379 transitions. [2020-10-21 22:38:40,831 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 379 transitions. Word has length 14 [2020-10-21 22:38:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:40,831 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 379 transitions. [2020-10-21 22:38:40,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 22:38:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 379 transitions. [2020-10-21 22:38:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:40,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:40,832 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:41,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 22:38:41,033 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:41,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1709586055, now seen corresponding path program 39 times [2020-10-21 22:38:41,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:41,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039179298] [2020-10-21 22:38:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039179298] [2020-10-21 22:38:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102719026] [2020-10-21 22:38:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:41,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 22:38:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:41,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:41,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:41,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 22:38:41,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734464497] [2020-10-21 22:38:41,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:38:41,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:38:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:38:41,365 INFO L87 Difference]: Start difference. First operand 150 states and 379 transitions. Second operand 17 states. [2020-10-21 22:38:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:41,852 INFO L93 Difference]: Finished difference Result 220 states and 527 transitions. [2020-10-21 22:38:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 22:38:41,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-21 22:38:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:41,855 INFO L225 Difference]: With dead ends: 220 [2020-10-21 22:38:41,855 INFO L226 Difference]: Without dead ends: 215 [2020-10-21 22:38:41,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-21 22:38:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-21 22:38:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 148. [2020-10-21 22:38:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-21 22:38:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 369 transitions. [2020-10-21 22:38:41,859 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 369 transitions. Word has length 14 [2020-10-21 22:38:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:41,859 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 369 transitions. [2020-10-21 22:38:41,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:38:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 369 transitions. [2020-10-21 22:38:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:41,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:41,860 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:42,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:42,061 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1706014979, now seen corresponding path program 40 times [2020-10-21 22:38:42,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:42,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391801776] [2020-10-21 22:38:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:42,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391801776] [2020-10-21 22:38:42,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47033617] [2020-10-21 22:38:42,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 22:38:42,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:38:42,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:42,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:42,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:42,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:42,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:42,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 22:38:42,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776555992] [2020-10-21 22:38:42,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 22:38:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:42,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 22:38:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:38:42,441 INFO L87 Difference]: Start difference. First operand 148 states and 369 transitions. Second operand 17 states. [2020-10-21 22:38:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:43,260 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-21 22:38:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:38:43,261 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-21 22:38:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:43,263 INFO L225 Difference]: With dead ends: 248 [2020-10-21 22:38:43,263 INFO L226 Difference]: Without dead ends: 243 [2020-10-21 22:38:43,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-21 22:38:43,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2020-10-21 22:38:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-21 22:38:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-21 22:38:43,268 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 14 [2020-10-21 22:38:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:43,268 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-21 22:38:43,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 22:38:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-21 22:38:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 22:38:43,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:43,269 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:43,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:43,481 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1706011135, now seen corresponding path program 41 times [2020-10-21 22:38:43,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:43,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971859751] [2020-10-21 22:38:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:43,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971859751] [2020-10-21 22:38:43,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000758137] [2020-10-21 22:38:43,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:43,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:38:43,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 22:38:43,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:45,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts Received shutdown request... [2020-10-21 22:38:50,068 WARN L210 SmtUtils]: Removed 3 from assertion stack [2020-10-21 22:38:50,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-21 22:38:50,270 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 22:38:50,275 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 22:38:50,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 10:38:50 BasicIcfg [2020-10-21 22:38:50,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 22:38:50,276 INFO L168 Benchmark]: Toolchain (without parser) took 279225.37 ms. Allocated memory was 142.1 MB in the beginning and 321.4 MB in the end (delta: 179.3 MB). Free memory was 104.2 MB in the beginning and 256.2 MB in the end (delta: -152.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:50,277 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-21 22:38:50,277 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.68 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 103.4 MB in the beginning and 159.9 MB in the end (delta: -56.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:50,277 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.60 ms. Allocated memory is still 203.4 MB. Free memory was 159.9 MB in the beginning and 157.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:50,278 INFO L168 Benchmark]: Boogie Preprocessor took 33.87 ms. Allocated memory is still 203.4 MB. Free memory was 157.9 MB in the beginning and 156.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:50,278 INFO L168 Benchmark]: RCFGBuilder took 462.68 ms. Allocated memory is still 203.4 MB. Free memory was 156.0 MB in the beginning and 134.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:50,278 INFO L168 Benchmark]: TraceAbstraction took 278002.34 ms. Allocated memory was 203.4 MB in the beginning and 321.4 MB in the end (delta: 118.0 MB). Free memory was 133.4 MB in the beginning and 256.2 MB in the end (delta: -122.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-21 22:38:50,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 661.68 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 103.4 MB in the beginning and 159.9 MB in the end (delta: -56.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.60 ms. Allocated memory is still 203.4 MB. Free memory was 159.9 MB in the beginning and 157.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.87 ms. Allocated memory is still 203.4 MB. Free memory was 157.9 MB in the beginning and 156.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 462.68 ms. Allocated memory is still 203.4 MB. Free memory was 156.0 MB in the beginning and 134.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278002.34 ms. Allocated memory was 203.4 MB in the beginning and 321.4 MB in the end (delta: 118.0 MB). Free memory was 133.4 MB in the beginning and 256.2 MB in the end (delta: -122.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 713 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 17 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 63 TotalNumberOfCompositions, 1215 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 44 for 2044ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 277.8s, OverallIterations: 54, TraceHistogramMax: 6, AutomataDifference: 226.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 689 SDtfs, 5888 SDslu, 4927 SDs, 0 SdLazy, 3567 SolverSat, 1039 SolverUnsat, 59 SolverUnknown, 0 SolverNotchecked, 112.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1436 GetRequests, 230 SyntacticMatches, 43 SemanticMatches, 1163 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6494 ImplicationChecksByTransitivity, 136.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 53 MinimizatonAttempts, 2711 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 28.0s InterpolantComputationTime, 1214 NumberOfCodeBlocks, 1214 NumberOfCodeBlocksAsserted, 156 NumberOfCheckSat, 1113 ConstructedInterpolants, 7 QuantifiedInterpolants, 105927 SizeOfPredicates, 48 NumberOfNonLiveVariables, 4744 ConjunctsInSsa, 452 ConjunctsInUnsatCore, 101 InterpolantComputations, 5 PerfectInterpolantSequences, 0/440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown