/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-14 12:51:12,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-14 12:51:12,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-14 12:51:12,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-14 12:51:12,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-14 12:51:12,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-14 12:51:12,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-14 12:51:12,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-14 12:51:12,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-14 12:51:12,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-14 12:51:12,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-14 12:51:12,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-14 12:51:12,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-14 12:51:12,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-14 12:51:12,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-14 12:51:12,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-14 12:51:12,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-14 12:51:12,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-14 12:51:12,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-14 12:51:12,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-14 12:51:12,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-14 12:51:12,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-14 12:51:12,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-14 12:51:12,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-14 12:51:12,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-14 12:51:12,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-14 12:51:12,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-14 12:51:12,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-14 12:51:12,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-14 12:51:12,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-14 12:51:12,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-14 12:51:12,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-14 12:51:12,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-14 12:51:12,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-14 12:51:12,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-14 12:51:12,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-14 12:51:12,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-14 12:51:12,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-14 12:51:12,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-14 12:51:12,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-14 12:51:12,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-14 12:51:13,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-14 12:51:13,032 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-14 12:51:13,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-14 12:51:13,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-14 12:51:13,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-14 12:51:13,034 INFO L138 SettingsManager]: * Use SBE=true [2020-09-14 12:51:13,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-14 12:51:13,035 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-14 12:51:13,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-14 12:51:13,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-14 12:51:13,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-14 12:51:13,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-14 12:51:13,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-14 12:51:13,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-14 12:51:13,037 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-14 12:51:13,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-14 12:51:13,037 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-14 12:51:13,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-14 12:51:13,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-14 12:51:13,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-14 12:51:13,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-14 12:51:13,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-14 12:51:13,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-14 12:51:13,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-14 12:51:13,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-14 12:51:13,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-14 12:51:13,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-14 12:51:13,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-14 12:51:13,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-14 12:51:13,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-14 12:51:13,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-14 12:51:13,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-14 12:51:13,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-14 12:51:13,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-14 12:51:13,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-14 12:51:13,587 INFO L275 PluginConnector]: CDTParser initialized [2020-09-14 12:51:13,588 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-14 12:51:13,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc8465003/21220f1c19fa4cc483d26c6c915548ff/FLAGa98769c4c [2020-09-14 12:51:14,467 INFO L306 CDTParser]: Found 1 translation units. [2020-09-14 12:51:14,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-14 12:51:14,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc8465003/21220f1c19fa4cc483d26c6c915548ff/FLAGa98769c4c [2020-09-14 12:51:14,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc8465003/21220f1c19fa4cc483d26c6c915548ff [2020-09-14 12:51:14,682 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-14 12:51:14,688 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-14 12:51:14,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:14,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-14 12:51:14,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-14 12:51:14,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:14" (1/1) ... [2020-09-14 12:51:14,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0dedf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:14, skipping insertion in model container [2020-09-14 12:51:14,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:14" (1/1) ... [2020-09-14 12:51:14,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-14 12:51:14,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-14 12:51:15,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:15,513 INFO L203 MainTranslator]: Completed pre-run [2020-09-14 12:51:15,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:15,691 INFO L208 MainTranslator]: Completed translation [2020-09-14 12:51:15,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15 WrapperNode [2020-09-14 12:51:15,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:15,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:15,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-14 12:51:15,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-14 12:51:15,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:15,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-14 12:51:15,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-14 12:51:15,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-14 12:51:15,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... [2020-09-14 12:51:15,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-14 12:51:15,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-14 12:51:15,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-14 12:51:15,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-14 12:51:15,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-14 12:51:15,900 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-14 12:51:15,901 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-14 12:51:15,901 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-14 12:51:15,901 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-14 12:51:15,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-14 12:51:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-14 12:51:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-14 12:51:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-14 12:51:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-14 12:51:15,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-14 12:51:15,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-14 12:51:15,905 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-14 12:51:16,344 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-14 12:51:16,344 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-14 12:51:16,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:16 BoogieIcfgContainer [2020-09-14 12:51:16,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-14 12:51:16,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-14 12:51:16,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-14 12:51:16,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-14 12:51:16,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 12:51:14" (1/3) ... [2020-09-14 12:51:16,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ca839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:16, skipping insertion in model container [2020-09-14 12:51:16,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:15" (2/3) ... [2020-09-14 12:51:16,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ca839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:16, skipping insertion in model container [2020-09-14 12:51:16,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:16" (3/3) ... [2020-09-14 12:51:16,362 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-09-14 12:51:16,373 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-14 12:51:16,373 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-14 12:51:16,384 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-14 12:51:16,385 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-14 12:51:16,415 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,415 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,415 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,415 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,416 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,416 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,416 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,417 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,417 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,418 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,418 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,418 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,418 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,419 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,419 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,419 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,420 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,420 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,420 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,420 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,420 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,421 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,422 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,436 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,436 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,437 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,437 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,437 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,437 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:16,462 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-14 12:51:16,489 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-14 12:51:16,489 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-14 12:51:16,489 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-14 12:51:16,489 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-14 12:51:16,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-14 12:51:16,490 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-14 12:51:16,490 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-14 12:51:16,490 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-14 12:51:16,510 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:16,512 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:16,561 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:16,562 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:16,570 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-14 12:51:16,573 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:16,594 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:16,595 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:16,597 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-14 12:51:16,599 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-14 12:51:16,601 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-14 12:51:18,015 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-14 12:51:18,278 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-14 12:51:18,278 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-14 12:51:18,284 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-14 12:51:18,300 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-14 12:51:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-14 12:51:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-14 12:51:18,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:18,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,318 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-14 12:51:18,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180414349] [2020-09-14 12:51:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180414349] [2020-09-14 12:51:18,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:18,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-14 12:51:18,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739946676] [2020-09-14 12:51:18,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-14 12:51:18,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-14 12:51:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-14 12:51:18,706 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-14 12:51:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:18,796 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-14 12:51:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:51:18,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-14 12:51:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:18,817 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:18,817 INFO L226 Difference]: Without dead ends: 42 [2020-09-14 12:51:18,820 INFO L675 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 [2020-09-14 12:51:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-14 12:51:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-14 12:51:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-14 12:51:18,884 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-14 12:51:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:18,885 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-14 12:51:18,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-14 12:51:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-14 12:51:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:51:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:18,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-14 12:51:18,888 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-14 12:51:18,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868947698] [2020-09-14 12:51:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868947698] [2020-09-14 12:51:19,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:19,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:51:19,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440868632] [2020-09-14 12:51:19,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:51:19,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:51:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:51:19,037 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-14 12:51:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,085 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-14 12:51:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-14 12:51:19,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:51:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,087 INFO L225 Difference]: With dead ends: 56 [2020-09-14 12:51:19,087 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:19,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-14 12:51:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-14 12:51:19,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-14 12:51:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,100 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-14 12:51:19,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:51:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-14 12:51:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:19,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-14 12:51:19,103 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-14 12:51:19,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296939515] [2020-09-14 12:51:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296939515] [2020-09-14 12:51:19,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:19,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:19,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769604734] [2020-09-14 12:51:19,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:19,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:19,215 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-14 12:51:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,336 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-14 12:51:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:19,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,338 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:19,339 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:19,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-14 12:51:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:19,350 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-14 12:51:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,350 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:19,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:19,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-14 12:51:19,352 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-14 12:51:19,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317610288] [2020-09-14 12:51:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317610288] [2020-09-14 12:51:19,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:19,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:19,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773644439] [2020-09-14 12:51:19,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:19,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:19,443 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-14 12:51:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,537 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:19,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,539 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:19,539 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:19,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-14 12:51:19,546 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-14 12:51:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,546 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-14 12:51:19,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-14 12:51:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:19,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-14 12:51:19,548 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-14 12:51:19,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350522472] [2020-09-14 12:51:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350522472] [2020-09-14 12:51:19,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:19,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:19,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734710118] [2020-09-14 12:51:19,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:19,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:19,642 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-14 12:51:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,765 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-14 12:51:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:19,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,767 INFO L225 Difference]: With dead ends: 57 [2020-09-14 12:51:19,767 INFO L226 Difference]: Without dead ends: 51 [2020-09-14 12:51:19,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-14 12:51:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-14 12:51:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:19,782 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-14 12:51:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,782 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:19,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:19,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,785 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-14 12:51:19,786 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-14 12:51:19,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077446378] [2020-09-14 12:51:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077446378] [2020-09-14 12:51:19,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863622117] [2020-09-14 12:51:19,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:19,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:19,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:20,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673464279] [2020-09-14 12:51:20,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:20,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:20,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:20,078 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-14 12:51:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:20,258 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-14 12:51:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:20,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:20,259 INFO L225 Difference]: With dead ends: 48 [2020-09-14 12:51:20,260 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:20,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-14 12:51:20,266 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-14 12:51:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:20,267 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-14 12:51:20,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-14 12:51:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:20,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:20,269 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:20,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-14 12:51:20,470 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-14 12:51:20,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:20,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042693420] [2020-09-14 12:51:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042693420] [2020-09-14 12:51:20,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120769218] [2020-09-14 12:51:20,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:20,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:20,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:20,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:20,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182347962] [2020-09-14 12:51:20,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:20,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:20,688 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-14 12:51:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:20,767 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:20,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:20,770 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:20,770 INFO L226 Difference]: Without dead ends: 48 [2020-09-14 12:51:20,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-14 12:51:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-14 12:51:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-14 12:51:20,777 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-14 12:51:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:20,777 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-14 12:51:20,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-14 12:51:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:20,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:20,778 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:20,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:20,981 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:20,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:20,982 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-14 12:51:20,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:20,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634003298] [2020-09-14 12:51:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634003298] [2020-09-14 12:51:21,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439113827] [2020-09-14 12:51:21,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:21,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:21,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:21,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:21,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516646428] [2020-09-14 12:51:21,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:21,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:21,230 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-14 12:51:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:21,371 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-14 12:51:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:51:21,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:21,373 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:21,373 INFO L226 Difference]: Without dead ends: 52 [2020-09-14 12:51:21,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-14 12:51:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-14 12:51:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:21,380 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-14 12:51:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:21,380 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:21,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:21,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:21,382 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:21,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,597 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-14 12:51:21,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:21,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290933171] [2020-09-14 12:51:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290933171] [2020-09-14 12:51:21,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432831358] [2020-09-14 12:51:21,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:21,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:21,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386719952] [2020-09-14 12:51:21,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:21,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:21,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:21,758 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-14 12:51:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:21,928 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:21,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:21,931 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:21,933 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:21,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-14 12:51:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-14 12:51:21,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-14 12:51:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:21,957 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-14 12:51:21,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-14 12:51:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:21,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:21,959 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:22,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:22,174 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:22,175 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-14 12:51:22,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:22,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99419746] [2020-09-14 12:51:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99419746] [2020-09-14 12:51:22,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901273253] [2020-09-14 12:51:22,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:22,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:22,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:22,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460350542] [2020-09-14 12:51:22,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:22,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:22,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:22,367 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-14 12:51:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:22,548 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-14 12:51:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:22,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:22,549 INFO L225 Difference]: With dead ends: 62 [2020-09-14 12:51:22,549 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:22,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-14 12:51:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-14 12:51:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-14 12:51:22,555 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-14 12:51:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:22,556 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-14 12:51:22,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-14 12:51:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:22,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:22,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:22,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-14 12:51:22,769 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-14 12:51:22,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:22,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694456210] [2020-09-14 12:51:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694456210] [2020-09-14 12:51:22,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50036435] [2020-09-14 12:51:22,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:22,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:51:22,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:22,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:22,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:22,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223920361] [2020-09-14 12:51:22,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:22,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:22,949 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-14 12:51:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,104 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-14 12:51:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:23,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,106 INFO L225 Difference]: With dead ends: 64 [2020-09-14 12:51:23,107 INFO L226 Difference]: Without dead ends: 58 [2020-09-14 12:51:23,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-14 12:51:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-14 12:51:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-14 12:51:23,113 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-14 12:51:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,114 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-14 12:51:23,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-14 12:51:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:23,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:23,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:23,330 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-14 12:51:23,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:23,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176061688] [2020-09-14 12:51:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176061688] [2020-09-14 12:51:23,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013555860] [2020-09-14 12:51:23,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:23,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:23,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:23,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:23,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:23,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:23,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717850563] [2020-09-14 12:51:23,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:23,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:23,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:23,618 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-14 12:51:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,810 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-14 12:51:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:23,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,811 INFO L225 Difference]: With dead ends: 61 [2020-09-14 12:51:23,812 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:23,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:51:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-14 12:51:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:23,827 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-14 12:51:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,828 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:23,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:23,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:24,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,047 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-14 12:51:24,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:24,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943294857] [2020-09-14 12:51:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943294857] [2020-09-14 12:51:24,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891094436] [2020-09-14 12:51:24,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:24,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:24,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:24,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:24,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271505519] [2020-09-14 12:51:24,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:24,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:24,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:24,258 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-14 12:51:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:24,411 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:24,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:24,413 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:24,413 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:24,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-14 12:51:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-14 12:51:24,427 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-14 12:51:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:24,428 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-14 12:51:24,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-14 12:51:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:24,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:24,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:24,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-14 12:51:24,642 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-14 12:51:24,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:24,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574537769] [2020-09-14 12:51:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574537769] [2020-09-14 12:51:24,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322440453] [2020-09-14 12:51:24,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:24,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:24,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:24,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:24,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400866678] [2020-09-14 12:51:24,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:24,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:24,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:24,818 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-14 12:51:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:25,105 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-14 12:51:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:25,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:25,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:25,108 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:25,108 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:25,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-14 12:51:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-14 12:51:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-14 12:51:25,114 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-14 12:51:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:25,115 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-14 12:51:25,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-14 12:51:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:25,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:25,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:25,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:25,318 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-14 12:51:25,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:25,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311202763] [2020-09-14 12:51:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311202763] [2020-09-14 12:51:25,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834380841] [2020-09-14 12:51:25,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:25,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:25,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:25,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:25,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605914537] [2020-09-14 12:51:25,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:25,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:25,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:25,519 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-14 12:51:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:25,738 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-14 12:51:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:25,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:25,740 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:25,740 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:25,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-14 12:51:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:25,745 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-14 12:51:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:25,746 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:25,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:25,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:25,747 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:25,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-14 12:51:25,957 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-14 12:51:25,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:25,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696804969] [2020-09-14 12:51:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696804969] [2020-09-14 12:51:26,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780220287] [2020-09-14 12:51:26,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:26,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:26,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:26,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409106568] [2020-09-14 12:51:26,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:26,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:26,192 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-14 12:51:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:26,409 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-14 12:51:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:26,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:26,411 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:26,411 INFO L226 Difference]: Without dead ends: 49 [2020-09-14 12:51:26,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-14 12:51:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-14 12:51:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-14 12:51:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-14 12:51:26,418 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-14 12:51:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:26,419 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-14 12:51:26,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-14 12:51:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:26,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:26,420 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:26,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-14 12:51:26,621 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-14 12:51:26,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:26,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037566982] [2020-09-14 12:51:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037566982] [2020-09-14 12:51:26,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840990879] [2020-09-14 12:51:26,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:26,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:26,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:26,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:26,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759919758] [2020-09-14 12:51:26,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:26,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:26,807 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-14 12:51:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:26,948 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-14 12:51:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:26,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:26,955 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:26,955 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:26,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-14 12:51:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-14 12:51:26,961 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-14 12:51:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:26,962 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-14 12:51:26,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-14 12:51:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:26,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:26,963 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-14 12:51:27,173 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,174 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-14 12:51:27,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989945521] [2020-09-14 12:51:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989945521] [2020-09-14 12:51:27,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344978722] [2020-09-14 12:51:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:27,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:27,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:27,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:27,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:27,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289713431] [2020-09-14 12:51:27,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:27,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:27,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:27,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:27,390 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-14 12:51:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:27,552 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-14 12:51:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:27,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:27,554 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:27,554 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:27,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:51:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-14 12:51:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:27,558 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-14 12:51:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:27,559 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:27,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:27,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:27,560 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-14 12:51:27,769 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-14 12:51:27,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166846301] [2020-09-14 12:51:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166846301] [2020-09-14 12:51:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123989493] [2020-09-14 12:51:27,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:27,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:27,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:27,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:27,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:27,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:27,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021988016] [2020-09-14 12:51:27,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:27,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:27,974 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-14 12:51:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:28,213 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-14 12:51:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:28,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:28,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:28,214 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:28,215 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:28,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:51:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-14 12:51:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-14 12:51:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-14 12:51:28,218 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-14 12:51:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:28,219 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-14 12:51:28,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-14 12:51:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:28,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:28,220 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:28,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:28,429 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-14 12:51:28,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:28,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115167851] [2020-09-14 12:51:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115167851] [2020-09-14 12:51:28,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339784254] [2020-09-14 12:51:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:28,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:28,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:28,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:28,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:28,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:28,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159027915] [2020-09-14 12:51:28,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:28,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:28,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:28,633 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-14 12:51:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:28,898 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-14 12:51:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:28,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:28,900 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:28,900 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:28,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-14 12:51:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:28,904 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-14 12:51:28,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:28,904 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:28,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:28,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:28,905 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:29,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:29,115 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-14 12:51:29,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:29,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496392557] [2020-09-14 12:51:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496392557] [2020-09-14 12:51:29,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738809007] [2020-09-14 12:51:29,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:29,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:29,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437866584] [2020-09-14 12:51:29,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:29,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:29,288 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-14 12:51:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:29,536 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-14 12:51:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:29,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:29,537 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:51:29,537 INFO L226 Difference]: Without dead ends: 82 [2020-09-14 12:51:29,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-14 12:51:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-14 12:51:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-14 12:51:29,544 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-14 12:51:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:29,544 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-14 12:51:29,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-14 12:51:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:29,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:29,545 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:29,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:29,758 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-14 12:51:29,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:29,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894898271] [2020-09-14 12:51:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894898271] [2020-09-14 12:51:29,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023284517] [2020-09-14 12:51:29,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-14 12:51:29,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:29,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:29,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:29,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:29,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834126524] [2020-09-14 12:51:29,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:29,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:29,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:29,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:29,952 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-14 12:51:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:30,291 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-14 12:51:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:30,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:30,299 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:30,313 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:30,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-14 12:51:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-14 12:51:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-14 12:51:30,317 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-14 12:51:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:30,317 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-14 12:51:30,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-14 12:51:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:30,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:30,318 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:30,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-14 12:51:30,519 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-14 12:51:30,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:30,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50700044] [2020-09-14 12:51:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50700044] [2020-09-14 12:51:30,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960682168] [2020-09-14 12:51:30,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:30,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:30,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:30,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:30,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:30,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96686465] [2020-09-14 12:51:30,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:30,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:30,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:30,750 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-14 12:51:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:30,929 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-14 12:51:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:30,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:30,930 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:30,930 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:30,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:51:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-14 12:51:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:30,935 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:30,935 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:30,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:30,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:30,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:31,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-14 12:51:31,148 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:31,149 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-14 12:51:31,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:31,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036529804] [2020-09-14 12:51:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036529804] [2020-09-14 12:51:31,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775270203] [2020-09-14 12:51:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:31,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:31,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:31,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:31,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:31,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:31,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674849124] [2020-09-14 12:51:31,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:31,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:31,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:31,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:31,372 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:31,624 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-14 12:51:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:31,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:31,625 INFO L225 Difference]: With dead ends: 71 [2020-09-14 12:51:31,626 INFO L226 Difference]: Without dead ends: 65 [2020-09-14 12:51:31,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-14 12:51:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-14 12:51:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:31,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:31,631 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:31,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:31,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:31,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:31,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-14 12:51:31,843 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-14 12:51:31,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:31,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926790007] [2020-09-14 12:51:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926790007] [2020-09-14 12:51:31,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78167500] [2020-09-14 12:51:31,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:32,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001291049] [2020-09-14 12:51:32,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:32,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:32,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:32,056 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:32,322 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-14 12:51:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:32,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:32,324 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:32,324 INFO L226 Difference]: Without dead ends: 62 [2020-09-14 12:51:32,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-14 12:51:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-14 12:51:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:32,330 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:32,331 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:32,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:32,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:32,331 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:32,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-14 12:51:32,542 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:32,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-14 12:51:32,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:32,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586133646] [2020-09-14 12:51:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586133646] [2020-09-14 12:51:32,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051319602] [2020-09-14 12:51:32,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:32,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:32,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:32,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694815043] [2020-09-14 12:51:32,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:32,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:32,778 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,149 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-14 12:51:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:33,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,151 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:33,151 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:33,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-14 12:51:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:33,155 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,155 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:33,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:33,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:33,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-14 12:51:33,358 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:33,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-14 12:51:33,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:33,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377667609] [2020-09-14 12:51:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377667609] [2020-09-14 12:51:33,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428316161] [2020-09-14 12:51:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:33,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:33,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090705975] [2020-09-14 12:51:33,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:33,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:33,545 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,851 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-14 12:51:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:33,852 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,854 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:33,854 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:33,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-14 12:51:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-14 12:51:33,858 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-14 12:51:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,859 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-14 12:51:33,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-14 12:51:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:33,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:34,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,071 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:34,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-14 12:51:34,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:34,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391545591] [2020-09-14 12:51:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391545591] [2020-09-14 12:51:34,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588817400] [2020-09-14 12:51:34,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:34,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:34,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:34,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:34,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:34,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485840580] [2020-09-14 12:51:34,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:34,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:34,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:34,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:34,305 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-14 12:51:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:34,629 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-14 12:51:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:34,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:34,631 INFO L225 Difference]: With dead ends: 62 [2020-09-14 12:51:34,631 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:34,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-14 12:51:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-14 12:51:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-14 12:51:34,636 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-14 12:51:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:34,637 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-14 12:51:34,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-14 12:51:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:34,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:34,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:34,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-14 12:51:34,849 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:34,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-14 12:51:34,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:34,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480406370] [2020-09-14 12:51:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480406370] [2020-09-14 12:51:34,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981761990] [2020-09-14 12:51:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:35,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:35,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:35,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:35,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790885466] [2020-09-14 12:51:35,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:35,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:35,046 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-14 12:51:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:35,448 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-14 12:51:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:35,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:35,450 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:35,450 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:35,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-14 12:51:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:35,456 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-14 12:51:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:35,456 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:35,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:35,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:35,457 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:35,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-14 12:51:35,669 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-14 12:51:35,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:35,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852415531] [2020-09-14 12:51:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852415531] [2020-09-14 12:51:35,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792498867] [2020-09-14 12:51:35,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:35,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:35,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:35,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:35,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:35,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:35,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773273655] [2020-09-14 12:51:35,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:35,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:35,875 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-14 12:51:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:36,270 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-14 12:51:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:36,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:36,272 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:36,272 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:36,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-14 12:51:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-14 12:51:36,276 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-14 12:51:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:36,276 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-14 12:51:36,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-14 12:51:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:36,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:36,277 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:36,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:36,483 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:36,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-14 12:51:36,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:36,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92049827] [2020-09-14 12:51:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92049827] [2020-09-14 12:51:36,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923011810] [2020-09-14 12:51:36,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:36,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:36,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:36,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:36,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093647070] [2020-09-14 12:51:36,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:36,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:36,710 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-14 12:51:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:36,887 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-14 12:51:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:36,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:36,888 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:36,888 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:36,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-14 12:51:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-14 12:51:36,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-14 12:51:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:36,892 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-14 12:51:36,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-14 12:51:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:36,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:36,893 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:37,101 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,102 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-14 12:51:37,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934704623] [2020-09-14 12:51:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934704623] [2020-09-14 12:51:37,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332387969] [2020-09-14 12:51:37,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:37,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:37,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:37,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:37,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:37,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:37,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195314926] [2020-09-14 12:51:37,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:37,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:37,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:37,350 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-14 12:51:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:37,629 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-14 12:51:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:37,630 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:37,631 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:37,631 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:37,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-14 12:51:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-14 12:51:37,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-14 12:51:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:37,637 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-14 12:51:37,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-14 12:51:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:37,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:37,639 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-14 12:51:37,840 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-14 12:51:37,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843952887] [2020-09-14 12:51:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843952887] [2020-09-14 12:51:38,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065524428] [2020-09-14 12:51:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:38,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:38,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:38,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315724179] [2020-09-14 12:51:38,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:38,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:38,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:38,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:38,146 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-14 12:51:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:38,449 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-14 12:51:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:38,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:38,451 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:38,451 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:38,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-14 12:51:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:38,459 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-14 12:51:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:38,459 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:38,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:38,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:38,460 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:38,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:38,671 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-14 12:51:38,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:38,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510410368] [2020-09-14 12:51:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510410368] [2020-09-14 12:51:38,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319826683] [2020-09-14 12:51:38,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:38,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:38,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:38,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:38,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649929914] [2020-09-14 12:51:38,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:38,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:38,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:38,881 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-14 12:51:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:39,214 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-14 12:51:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:39,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:39,215 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:39,216 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:39,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:51:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-14 12:51:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:39,219 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-14 12:51:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:39,219 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:39,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:39,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:39,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:39,220 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:39,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-14 12:51:39,421 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:39,422 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-14 12:51:39,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:39,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739898703] [2020-09-14 12:51:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739898703] [2020-09-14 12:51:39,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904551474] [2020-09-14 12:51:39,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:39,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:39,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:39,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:39,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640351480] [2020-09-14 12:51:39,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:39,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:39,661 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-14 12:51:39,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:39,961 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-14 12:51:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:39,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:39,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:39,963 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:39,963 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:39,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-14 12:51:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-14 12:51:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-14 12:51:39,966 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-14 12:51:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:39,967 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-14 12:51:39,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-14 12:51:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:39,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:39,968 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:40,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,169 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-14 12:51:40,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:40,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393231798] [2020-09-14 12:51:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393231798] [2020-09-14 12:51:40,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686346854] [2020-09-14 12:51:40,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:40,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:40,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:40,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:40,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330866469] [2020-09-14 12:51:40,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:40,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:40,394 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-14 12:51:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:40,777 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-14 12:51:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:40,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:40,779 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:40,780 INFO L226 Difference]: Without dead ends: 70 [2020-09-14 12:51:40,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-14 12:51:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-14 12:51:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:40,782 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-14 12:51:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:40,783 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:40,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:40,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:40,783 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:40,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-14 12:51:40,984 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-14 12:51:40,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:40,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428566527] [2020-09-14 12:51:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428566527] [2020-09-14 12:51:41,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888824293] [2020-09-14 12:51:41,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:41,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:41,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:41,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:41,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:41,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986476110] [2020-09-14 12:51:41,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:41,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:41,172 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-14 12:51:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:41,548 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-14 12:51:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:41,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:41,550 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:51:41,550 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:51:41,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:51:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:51:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-14 12:51:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-14 12:51:41,555 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-14 12:51:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:41,555 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-14 12:51:41,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-14 12:51:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:41,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:41,557 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:41,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-14 12:51:41,770 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-14 12:51:41,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:41,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118604292] [2020-09-14 12:51:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118604292] [2020-09-14 12:51:41,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396889467] [2020-09-14 12:51:41,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-14 12:51:41,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:41,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:41,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949323569] [2020-09-14 12:51:41,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:41,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:41,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:41,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:41,989 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-14 12:51:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:42,491 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-14 12:51:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:42,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:42,493 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:42,493 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:42,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-14 12:51:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-14 12:51:42,498 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-14 12:51:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:42,498 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-14 12:51:42,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-14 12:51:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:42,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:42,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:42,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-14 12:51:42,712 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-14 12:51:42,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:42,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478235768] [2020-09-14 12:51:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478235768] [2020-09-14 12:51:42,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535598708] [2020-09-14 12:51:42,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:42,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:42,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017852138] [2020-09-14 12:51:42,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:42,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:42,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:42,964 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-14 12:51:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:43,273 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-14 12:51:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:43,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:43,275 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:43,275 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:43,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-14 12:51:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:43,281 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:43,281 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:43,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:43,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:43,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:43,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-14 12:51:43,494 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-14 12:51:43,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:43,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546386004] [2020-09-14 12:51:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546386004] [2020-09-14 12:51:43,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630660813] [2020-09-14 12:51:43,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-14 12:51:43,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:43,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:43,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:43,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:43,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719964838] [2020-09-14 12:51:43,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:43,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:43,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:43,756 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:44,100 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-14 12:51:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:44,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:44,101 INFO L225 Difference]: With dead ends: 81 [2020-09-14 12:51:44,101 INFO L226 Difference]: Without dead ends: 75 [2020-09-14 12:51:44,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-14 12:51:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-14 12:51:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:44,105 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:44,105 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:44,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:44,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:44,106 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:44,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-14 12:51:44,314 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-14 12:51:44,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:44,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51021138] [2020-09-14 12:51:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51021138] [2020-09-14 12:51:44,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167739285] [2020-09-14 12:51:44,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:44,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:44,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:44,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591346756] [2020-09-14 12:51:44,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:44,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:44,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:44,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:44,523 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:44,819 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:44,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:44,821 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:44,822 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:44,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:51:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-14 12:51:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:44,825 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:44,825 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:44,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:44,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:44,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:45,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-14 12:51:45,029 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-14 12:51:45,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:45,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689373117] [2020-09-14 12:51:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689373117] [2020-09-14 12:51:45,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961141910] [2020-09-14 12:51:45,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:45,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:45,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:45,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:45,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406778636] [2020-09-14 12:51:45,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:45,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:45,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:45,262 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:45,690 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:45,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:45,692 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:45,692 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:45,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:51:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-14 12:51:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:45,701 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:45,701 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:45,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:45,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:45,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:45,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-14 12:51:45,917 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-14 12:51:45,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:45,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096395669] [2020-09-14 12:51:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096395669] [2020-09-14 12:51:46,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998924282] [2020-09-14 12:51:46,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:46,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:46,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:46,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660265624] [2020-09-14 12:51:46,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:46,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:46,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:46,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:46,146 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:46,501 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-14 12:51:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:46,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:46,503 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:46,503 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:46,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-14 12:51:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:46,507 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:46,512 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:46,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:46,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:46,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:46,724 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-14 12:51:46,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:46,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315181945] [2020-09-14 12:51:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315181945] [2020-09-14 12:51:46,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050375806] [2020-09-14 12:51:46,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:46,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:46,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:46,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:46,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:46,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:47,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:47,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581021330] [2020-09-14 12:51:47,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:47,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:47,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:47,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:47,021 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:47,548 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-14 12:51:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:47,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:47,550 INFO L225 Difference]: With dead ends: 73 [2020-09-14 12:51:47,550 INFO L226 Difference]: Without dead ends: 67 [2020-09-14 12:51:47,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-14 12:51:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-14 12:51:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:47,556 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:47,557 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:47,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:47,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:47,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:47,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-14 12:51:47,769 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-14 12:51:47,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:47,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894108456] [2020-09-14 12:51:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894108456] [2020-09-14 12:51:47,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746860363] [2020-09-14 12:51:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:47,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:47,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101146134] [2020-09-14 12:51:47,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:47,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:47,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:47,955 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:48,320 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-14 12:51:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:48,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:48,322 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:48,322 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:48,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-14 12:51:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:51:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-14 12:51:48,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-14 12:51:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:48,327 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-14 12:51:48,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-14 12:51:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:48,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:48,328 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:48,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,536 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-14 12:51:48,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:48,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943227244] [2020-09-14 12:51:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943227244] [2020-09-14 12:51:48,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667501681] [2020-09-14 12:51:48,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:48,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:48,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:48,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:48,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649985495] [2020-09-14 12:51:48,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:48,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:48,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:48,762 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-14 12:51:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:49,276 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-14 12:51:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:49,277 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:49,278 INFO L225 Difference]: With dead ends: 70 [2020-09-14 12:51:49,278 INFO L226 Difference]: Without dead ends: 62 [2020-09-14 12:51:49,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-14 12:51:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-14 12:51:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-14 12:51:49,282 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-14 12:51:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:49,282 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-14 12:51:49,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-14 12:51:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:49,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:49,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:49,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-14 12:51:49,492 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-14 12:51:49,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:49,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763172641] [2020-09-14 12:51:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763172641] [2020-09-14 12:51:49,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491371287] [2020-09-14 12:51:49,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:49,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:49,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:49,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:49,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70157611] [2020-09-14 12:51:49,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:49,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:49,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:49,684 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-14 12:51:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:50,176 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-14 12:51:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:50,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:50,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:50,178 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:50,178 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:50,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-14 12:51:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:50,182 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-14 12:51:50,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:50,182 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:50,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:50,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:50,183 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:50,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:50,394 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-14 12:51:50,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:50,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170509023] [2020-09-14 12:51:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170509023] [2020-09-14 12:51:50,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887607842] [2020-09-14 12:51:50,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:50,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:50,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:50,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:50,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:50,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403361761] [2020-09-14 12:51:50,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:50,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:50,609 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-14 12:51:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:51,130 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-14 12:51:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:51,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:51,131 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:51,132 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:51,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-14 12:51:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-14 12:51:51,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-14 12:51:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:51,135 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-14 12:51:51,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-14 12:51:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:51,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:51,136 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:51,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-14 12:51:51,344 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-14 12:51:51,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:51,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045160820] [2020-09-14 12:51:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045160820] [2020-09-14 12:51:51,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750377164] [2020-09-14 12:51:51,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:51,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:51,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:51,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:51,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952240738] [2020-09-14 12:51:51,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:51,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:51,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:51,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:51,587 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-14 12:51:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:51,774 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-14 12:51:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:51,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:51,775 INFO L225 Difference]: With dead ends: 72 [2020-09-14 12:51:51,776 INFO L226 Difference]: Without dead ends: 66 [2020-09-14 12:51:51,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-14 12:51:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-14 12:51:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-14 12:51:51,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-14 12:51:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:51,780 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-14 12:51:51,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-14 12:51:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:51,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:51,781 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:51,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-14 12:51:51,986 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-14 12:51:51,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:51,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516499302] [2020-09-14 12:51:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516499302] [2020-09-14 12:51:52,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712425876] [2020-09-14 12:51:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:52,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:52,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:52,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:52,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:52,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265392787] [2020-09-14 12:51:52,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:52,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:52,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:52,211 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-14 12:51:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:52,500 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-14 12:51:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:52,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:52,502 INFO L225 Difference]: With dead ends: 82 [2020-09-14 12:51:52,502 INFO L226 Difference]: Without dead ends: 76 [2020-09-14 12:51:52,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-14 12:51:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-14 12:51:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-14 12:51:52,504 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-14 12:51:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:52,504 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-14 12:51:52,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-14 12:51:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:52,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:52,505 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:52,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-14 12:51:52,707 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:52,708 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-14 12:51:52,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:52,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437705383] [2020-09-14 12:51:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437705383] [2020-09-14 12:51:52,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428453539] [2020-09-14 12:51:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:52,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:52,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319217959] [2020-09-14 12:51:52,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:52,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:52,945 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-14 12:51:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:53,240 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-14 12:51:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:53,241 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:53,242 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:53,242 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:53,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-14 12:51:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-14 12:51:53,246 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-14 12:51:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:53,246 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-14 12:51:53,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-14 12:51:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:53,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:53,247 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:53,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-14 12:51:53,450 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:53,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-14 12:51:53,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:53,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268840206] [2020-09-14 12:51:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268840206] [2020-09-14 12:51:53,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739963214] [2020-09-14 12:51:53,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:53,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:53,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:53,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:53,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:53,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:53,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601352656] [2020-09-14 12:51:53,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:53,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:53,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:53,687 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-14 12:51:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:54,037 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-14 12:51:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:54,041 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:54,042 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:54,042 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:54,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-14 12:51:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-14 12:51:54,046 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-14 12:51:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:54,046 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-14 12:51:54,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-14 12:51:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:54,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:54,047 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:54,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:54,256 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-14 12:51:54,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:54,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586500976] [2020-09-14 12:51:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:54,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586500976] [2020-09-14 12:51:54,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101646781] [2020-09-14 12:51:54,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:54,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:54,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:54,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:54,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:54,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208400749] [2020-09-14 12:51:54,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:54,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:54,480 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-14 12:51:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:54,861 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-14 12:51:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:54,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:54,863 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:54,863 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:54,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-14 12:51:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:54,868 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-14 12:51:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:54,868 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:54,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:54,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:54,869 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:55,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:55,070 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-14 12:51:55,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:55,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127132708] [2020-09-14 12:51:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127132708] [2020-09-14 12:51:55,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32630746] [2020-09-14 12:51:55,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:55,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:55,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:55,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:55,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:55,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760163609] [2020-09-14 12:51:55,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:55,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:55,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:55,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:55,318 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-14 12:51:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:55,773 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-14 12:51:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:55,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:55,775 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:51:55,775 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:51:55,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:51:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:51:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-14 12:51:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:55,779 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-14 12:51:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:55,779 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:55,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:55,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:55,780 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:55,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-14 12:51:55,987 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:55,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:55,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-14 12:51:55,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:55,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574598809] [2020-09-14 12:51:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574598809] [2020-09-14 12:51:56,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829242276] [2020-09-14 12:51:56,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:56,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:56,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:56,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:56,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:56,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:56,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233157582] [2020-09-14 12:51:56,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:56,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:56,189 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-14 12:51:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:56,595 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-14 12:51:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:51:56,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:56,597 INFO L225 Difference]: With dead ends: 87 [2020-09-14 12:51:56,597 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:51:56,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:51:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-14 12:51:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-14 12:51:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-14 12:51:56,600 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-14 12:51:56,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:56,601 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-14 12:51:56,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-14 12:51:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:56,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:56,601 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:56,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:56,807 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:56,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-14 12:51:56,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:56,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514655877] [2020-09-14 12:51:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514655877] [2020-09-14 12:51:56,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487679647] [2020-09-14 12:51:56,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:56,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:56,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:56,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:56,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:57,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:57,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381297321] [2020-09-14 12:51:57,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:57,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:57,005 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-14 12:51:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:57,523 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-14 12:51:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:57,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:57,524 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:57,524 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:57,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-14 12:51:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:57,528 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-14 12:51:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:57,528 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:57,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:57,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:57,529 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:57,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-14 12:51:57,730 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-14 12:51:57,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:57,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443134940] [2020-09-14 12:51:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:57,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443134940] [2020-09-14 12:51:57,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398516700] [2020-09-14 12:51:57,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:57,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:57,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:57,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:57,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389794717] [2020-09-14 12:51:57,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:57,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:57,929 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-14 12:51:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:58,403 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-14 12:51:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:51:58,403 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:58,404 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:51:58,404 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:51:58,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:51:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:51:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-14 12:51:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:51:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-14 12:51:58,407 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-14 12:51:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:58,407 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-14 12:51:58,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-14 12:51:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:58,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:58,408 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:58,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-14 12:51:58,609 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-14 12:51:58,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:58,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573291589] [2020-09-14 12:51:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:58,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573291589] [2020-09-14 12:51:58,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523430617] [2020-09-14 12:51:58,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:58,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:58,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:58,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:58,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:58,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130076989] [2020-09-14 12:51:58,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:58,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:58,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:58,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:58,841 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-14 12:51:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:59,438 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-14 12:51:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:51:59,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:59,439 INFO L225 Difference]: With dead ends: 85 [2020-09-14 12:51:59,439 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:59,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:51:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-14 12:51:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:51:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-14 12:51:59,442 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-14 12:51:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:59,443 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-14 12:51:59,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-14 12:51:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:59,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:59,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:59,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-14 12:51:59,644 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-14 12:51:59,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:59,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734557960] [2020-09-14 12:51:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:59,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734557960] [2020-09-14 12:51:59,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967650494] [2020-09-14 12:51:59,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:59,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:59,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:59,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:59,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448065974] [2020-09-14 12:51:59,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:59,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:59,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:59,910 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-14 12:52:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:00,184 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-14 12:52:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:52:00,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:00,186 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:52:00,186 INFO L226 Difference]: Without dead ends: 88 [2020-09-14 12:52:00,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:52:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-14 12:52:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-14 12:52:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:52:00,188 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:52:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:00,188 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:52:00,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:52:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:00,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:00,190 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:00,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-14 12:52:00,391 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-14 12:52:00,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:00,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316581290] [2020-09-14 12:52:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:00,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316581290] [2020-09-14 12:52:00,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144229963] [2020-09-14 12:52:00,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:00,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:00,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:00,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:00,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:00,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:00,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:00,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290595322] [2020-09-14 12:52:00,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:00,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:00,684 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:52:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:01,081 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-14 12:52:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:52:01,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:01,083 INFO L225 Difference]: With dead ends: 91 [2020-09-14 12:52:01,084 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:52:01,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:52:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:52:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-14 12:52:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:01,087 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:52:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:01,088 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:01,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:01,089 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:01,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-14 12:52:01,299 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:01,300 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-14 12:52:01,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:01,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770787379] [2020-09-14 12:52:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:01,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770787379] [2020-09-14 12:52:01,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949676160] [2020-09-14 12:52:01,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:01,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:52:01,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:01,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:01,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:52:01,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543305269] [2020-09-14 12:52:01,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:52:01,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:01,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:52:01,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:52:01,507 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:52:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:01,838 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-14 12:52:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:52:01,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:01,840 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:52:01,840 INFO L226 Difference]: Without dead ends: 82 [2020-09-14 12:52:01,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:52:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-14 12:52:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-14 12:52:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:52:01,843 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:52:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:01,843 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:52:01,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:52:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:01,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:01,843 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:02,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:02,045 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-14 12:52:02,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:02,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900460723] [2020-09-14 12:52:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:02,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900460723] [2020-09-14 12:52:02,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466438604] [2020-09-14 12:52:02,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:02,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:52:02,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:02,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:02,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:02,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:02,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656540610] [2020-09-14 12:52:02,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:02,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:02,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:02,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:02,296 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:52:02,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:02,771 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-14 12:52:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:52:02,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:02,773 INFO L225 Difference]: With dead ends: 87 [2020-09-14 12:52:02,773 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:52:02,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:52:02,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:52:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-14 12:52:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:02,776 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:52:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:02,776 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:02,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:02,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:02,777 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:02,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:02,978 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-14 12:52:02,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:02,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654751669] [2020-09-14 12:52:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:03,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654751669] [2020-09-14 12:52:03,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494136430] [2020-09-14 12:52:03,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:03,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:03,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:03,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:52:03,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376864708] [2020-09-14 12:52:03,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:52:03,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:03,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:52:03,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:52:03,220 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:52:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:03,604 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-14 12:52:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:52:03,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:03,605 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:52:03,606 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:52:03,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:52:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:52:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-14 12:52:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:52:03,608 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:52:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:03,608 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:52:03,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:52:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:03,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:03,609 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:03,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-14 12:52:03,816 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-14 12:52:03,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:03,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019733995] [2020-09-14 12:52:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:03,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019733995] [2020-09-14 12:52:03,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100178121] [2020-09-14 12:52:03,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:04,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:04,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:04,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:04,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:04,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:04,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:04,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:04,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13850199] [2020-09-14 12:52:04,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:04,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:04,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:04,070 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:52:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:04,596 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-14 12:52:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:04,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:04,597 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:52:04,598 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:52:04,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:52:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:52:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-14 12:52:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:04,603 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:52:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:04,603 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:04,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:04,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:04,604 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:04,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:04,812 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-14 12:52:04,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:04,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734889694] [2020-09-14 12:52:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:04,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734889694] [2020-09-14 12:52:04,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667174347] [2020-09-14 12:52:04,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:05,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:52:05,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:05,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:05,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:05,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:52:05,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253795109] [2020-09-14 12:52:05,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:52:05,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:05,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:52:05,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:52:05,047 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:52:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:05,505 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-14 12:52:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:05,506 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:05,506 INFO L225 Difference]: With dead ends: 80 [2020-09-14 12:52:05,507 INFO L226 Difference]: Without dead ends: 74 [2020-09-14 12:52:05,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:52:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-14 12:52:05,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-14 12:52:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:52:05,509 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:52:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:05,510 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:52:05,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:52:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:05,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:05,510 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:05,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-14 12:52:05,711 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:05,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:05,712 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-14 12:52:05,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:05,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469065849] [2020-09-14 12:52:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:05,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469065849] [2020-09-14 12:52:05,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814069724] [2020-09-14 12:52:05,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:05,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:05,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:05,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:05,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:05,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:05,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116137103] [2020-09-14 12:52:05,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:05,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:05,959 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:52:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:06,577 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-14 12:52:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:06,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:06,579 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:52:06,579 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:52:06,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:52:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:52:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-14 12:52:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:06,583 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:52:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:06,583 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:06,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:06,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:06,584 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:06,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:06,789 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-14 12:52:06,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:06,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198637385] [2020-09-14 12:52:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:06,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198637385] [2020-09-14 12:52:06,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257510757] [2020-09-14 12:52:06,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:06,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:52:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:07,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:07,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:52:07,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598666896] [2020-09-14 12:52:07,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:52:07,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:07,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:52:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:52:07,015 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:52:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:07,519 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-14 12:52:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:07,520 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:07,521 INFO L225 Difference]: With dead ends: 95 [2020-09-14 12:52:07,521 INFO L226 Difference]: Without dead ends: 89 [2020-09-14 12:52:07,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-14 12:52:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-14 12:52:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:52:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-14 12:52:07,524 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-14 12:52:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:07,524 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-14 12:52:07,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-14 12:52:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:07,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:07,525 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:07,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-14 12:52:07,729 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-14 12:52:07,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:07,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625904463] [2020-09-14 12:52:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:07,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625904463] [2020-09-14 12:52:07,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821655487] [2020-09-14 12:52:07,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:07,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:52:07,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:07,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:07,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:07,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:07,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:07,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803470756] [2020-09-14 12:52:07,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:07,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:07,948 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-14 12:52:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:08,619 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-14 12:52:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:08,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:08,621 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:52:08,621 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:52:08,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:52:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-14 12:52:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-14 12:52:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-14 12:52:08,624 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-14 12:52:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:08,624 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-14 12:52:08,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-14 12:52:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:08,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:08,625 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:08,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:08,833 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:08,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-14 12:52:08,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:08,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590219537] [2020-09-14 12:52:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:08,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590219537] [2020-09-14 12:52:08,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704574034] [2020-09-14 12:52:08,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:09,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:09,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:09,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:09,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:09,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922046462] [2020-09-14 12:52:09,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:09,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:09,065 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-14 12:52:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:09,673 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-14 12:52:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:09,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:09,675 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:52:09,675 INFO L226 Difference]: Without dead ends: 79 [2020-09-14 12:52:09,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-14 12:52:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-14 12:52:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:52:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-14 12:52:09,678 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-14 12:52:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:09,678 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-14 12:52:09,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-14 12:52:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:09,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:09,679 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:09,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-14 12:52:09,880 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-14 12:52:09,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:09,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069166426] [2020-09-14 12:52:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:10,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069166426] [2020-09-14 12:52:10,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55642351] [2020-09-14 12:52:10,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:10,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:10,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:10,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:10,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:10,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:10,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:10,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:10,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584810632] [2020-09-14 12:52:10,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:10,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:10,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:10,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:10,136 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-14 12:52:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:10,797 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-14 12:52:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:10,798 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:10,799 INFO L225 Difference]: With dead ends: 72 [2020-09-14 12:52:10,799 INFO L226 Difference]: Without dead ends: 67 [2020-09-14 12:52:10,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:10,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-14 12:52:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-14 12:52:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:52:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-14 12:52:10,803 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-14 12:52:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:10,803 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-14 12:52:10,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-14 12:52:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:10,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:10,804 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:11,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-14 12:52:11,009 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-14 12:52:11,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:11,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078826104] [2020-09-14 12:52:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:11,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078826104] [2020-09-14 12:52:11,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591056871] [2020-09-14 12:52:11,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:11,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:11,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:11,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:11,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:11,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:11,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095620935] [2020-09-14 12:52:11,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:11,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:11,278 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-14 12:52:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:11,575 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-14 12:52:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:52:11,576 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:11,577 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:52:11,577 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:52:11,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:52:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:52:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-14 12:52:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:52:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-14 12:52:11,580 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-14 12:52:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:11,580 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-14 12:52:11,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-14 12:52:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:11,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:11,581 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:11,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:11,788 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-14 12:52:11,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:11,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412056247] [2020-09-14 12:52:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:11,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412056247] [2020-09-14 12:52:11,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199605613] [2020-09-14 12:52:11,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:12,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:12,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:12,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:12,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:12,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:12,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:12,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81774840] [2020-09-14 12:52:12,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:12,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:12,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:12,096 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-14 12:52:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:12,458 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-14 12:52:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:52:12,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:12,459 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:52:12,459 INFO L226 Difference]: Without dead ends: 84 [2020-09-14 12:52:12,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:52:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-14 12:52:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-14 12:52:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:52:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-14 12:52:12,463 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-14 12:52:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:12,463 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-14 12:52:12,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-14 12:52:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:12,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:12,464 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:12,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:12,672 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-14 12:52:12,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:12,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116053764] [2020-09-14 12:52:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:12,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116053764] [2020-09-14 12:52:12,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220926601] [2020-09-14 12:52:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:12,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:12,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:12,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:12,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:12,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:12,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404588365] [2020-09-14 12:52:12,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:12,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:12,921 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-14 12:52:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:13,254 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-14 12:52:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:52:13,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:13,255 INFO L225 Difference]: With dead ends: 91 [2020-09-14 12:52:13,256 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:52:13,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:52:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:52:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-14 12:52:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-14 12:52:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-14 12:52:13,258 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-14 12:52:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:13,259 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-14 12:52:13,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-14 12:52:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:13,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:13,260 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:13,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:13,469 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-14 12:52:13,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:13,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44500232] [2020-09-14 12:52:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:13,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44500232] [2020-09-14 12:52:13,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966679743] [2020-09-14 12:52:13,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:13,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:13,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:13,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:13,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:13,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:13,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:13,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645575444] [2020-09-14 12:52:13,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:13,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:13,744 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-14 12:52:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:14,170 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-14 12:52:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:52:14,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:14,172 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:52:14,172 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:14,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:52:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-14 12:52:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:52:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-14 12:52:14,176 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-14 12:52:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:14,177 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-14 12:52:14,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-14 12:52:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:14,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:14,178 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:14,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:14,389 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:14,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:14,390 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-14 12:52:14,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:14,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25131694] [2020-09-14 12:52:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:14,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25131694] [2020-09-14 12:52:14,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812910418] [2020-09-14 12:52:14,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:14,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:14,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:14,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030749272] [2020-09-14 12:52:14,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:14,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:14,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:14,699 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-14 12:52:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:15,138 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-14 12:52:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:15,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:15,140 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:52:15,140 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:15,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:52:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-14 12:52:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:52:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-14 12:52:15,143 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-14 12:52:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:15,144 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-14 12:52:15,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-14 12:52:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:15,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:15,145 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:15,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-14 12:52:15,354 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-14 12:52:15,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:15,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952623358] [2020-09-14 12:52:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:15,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952623358] [2020-09-14 12:52:15,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255987129] [2020-09-14 12:52:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:15,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:15,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:15,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:15,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:15,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:15,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:15,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411554640] [2020-09-14 12:52:15,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:15,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:15,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:15,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:15,634 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-14 12:52:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:16,171 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-14 12:52:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:16,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:16,173 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:52:16,173 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:52:16,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:52:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-14 12:52:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:52:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-14 12:52:16,176 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-14 12:52:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:16,176 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-14 12:52:16,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-14 12:52:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:16,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:16,177 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:16,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:16,377 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-14 12:52:16,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:16,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365373620] [2020-09-14 12:52:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:16,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365373620] [2020-09-14 12:52:16,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972883762] [2020-09-14 12:52:16,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:16,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:16,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:16,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:16,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:16,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253846554] [2020-09-14 12:52:16,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:16,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:16,606 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-14 12:52:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:17,115 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-14 12:52:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:17,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:17,117 INFO L225 Difference]: With dead ends: 97 [2020-09-14 12:52:17,117 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:52:17,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:52:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:52:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-14 12:52:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:52:17,121 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-14 12:52:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:17,121 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:52:17,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:52:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:17,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:17,122 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:17,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-14 12:52:17,332 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-14 12:52:17,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:17,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010974065] [2020-09-14 12:52:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:17,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010974065] [2020-09-14 12:52:17,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176823581] [2020-09-14 12:52:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:17,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:17,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:17,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:17,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:17,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:17,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:17,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:17,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406895406] [2020-09-14 12:52:17,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:17,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:17,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:17,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:17,613 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-14 12:52:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:18,306 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-14 12:52:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:18,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:18,309 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:52:18,309 INFO L226 Difference]: Without dead ends: 88 [2020-09-14 12:52:18,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-14 12:52:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-14 12:52:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:18,313 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-14 12:52:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:18,314 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:18,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:18,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:18,315 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:18,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:18,516 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-14 12:52:18,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:18,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409878598] [2020-09-14 12:52:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:18,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409878598] [2020-09-14 12:52:18,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375735255] [2020-09-14 12:52:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:18,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:18,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:18,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:18,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:18,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938178645] [2020-09-14 12:52:18,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:18,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:18,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:18,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:18,749 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-14 12:52:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:19,275 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-14 12:52:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:52:19,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:19,276 INFO L225 Difference]: With dead ends: 95 [2020-09-14 12:52:19,277 INFO L226 Difference]: Without dead ends: 89 [2020-09-14 12:52:19,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-14 12:52:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-14 12:52:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-14 12:52:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-14 12:52:19,280 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-14 12:52:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:19,280 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-14 12:52:19,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-14 12:52:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:19,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:19,281 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:19,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-14 12:52:19,484 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-14 12:52:19,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:19,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732670918] [2020-09-14 12:52:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:19,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732670918] [2020-09-14 12:52:19,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603233687] [2020-09-14 12:52:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:19,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:19,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:19,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:19,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:19,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:19,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:19,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204511749] [2020-09-14 12:52:19,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:19,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:19,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:19,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:19,753 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-14 12:52:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:20,468 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-14 12:52:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:20,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:20,470 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:52:20,470 INFO L226 Difference]: Without dead ends: 86 [2020-09-14 12:52:20,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-14 12:52:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-14 12:52:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:52:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-14 12:52:20,472 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-14 12:52:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:20,473 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-14 12:52:20,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-14 12:52:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:20,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:20,474 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:20,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:20,682 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:20,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-14 12:52:20,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:20,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870854960] [2020-09-14 12:52:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:20,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870854960] [2020-09-14 12:52:20,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218388208] [2020-09-14 12:52:20,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:20,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:20,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:20,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542202101] [2020-09-14 12:52:20,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:20,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:20,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:20,926 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-14 12:52:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:21,520 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-14 12:52:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:21,525 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:21,525 INFO L225 Difference]: With dead ends: 112 [2020-09-14 12:52:21,525 INFO L226 Difference]: Without dead ends: 106 [2020-09-14 12:52:21,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-14 12:52:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-14 12:52:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:52:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-14 12:52:21,528 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-14 12:52:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:21,529 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-14 12:52:21,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-14 12:52:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:21,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:21,530 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:21,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:21,739 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-14 12:52:21,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:21,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552508548] [2020-09-14 12:52:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:21,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552508548] [2020-09-14 12:52:21,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466511136] [2020-09-14 12:52:21,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:21,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:21,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:21,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:21,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:21,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:21,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354079438] [2020-09-14 12:52:21,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:21,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:21,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:21,977 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-14 12:52:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:22,655 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-14 12:52:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:52:22,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:22,656 INFO L225 Difference]: With dead ends: 93 [2020-09-14 12:52:22,657 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:52:22,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:52:22,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:52:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-14 12:52:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-14 12:52:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-14 12:52:22,659 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-14 12:52:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:22,659 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-14 12:52:22,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-14 12:52:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:22,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:22,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:22,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:22,868 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:22,869 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-14 12:52:22,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:22,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381544658] [2020-09-14 12:52:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:23,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381544658] [2020-09-14 12:52:23,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797403808] [2020-09-14 12:52:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:23,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:23,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:23,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:23,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:23,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908210775] [2020-09-14 12:52:23,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:23,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:23,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:23,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:23,172 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-14 12:52:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:23,558 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-14 12:52:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:52:23,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:23,560 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:52:23,560 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:52:23,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:52:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:52:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-14 12:52:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:23,563 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:23,564 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:23,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:23,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:23,565 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:23,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:23,775 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-14 12:52:23,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:23,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401446877] [2020-09-14 12:52:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:23,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401446877] [2020-09-14 12:52:23,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121774382] [2020-09-14 12:52:23,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:24,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:24,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:24,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:24,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:24,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:24,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039579936] [2020-09-14 12:52:24,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:24,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:24,086 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:24,575 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-14 12:52:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:52:24,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:24,577 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:52:24,577 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:52:24,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:52:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:52:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-14 12:52:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:24,580 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:24,580 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:24,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:24,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:24,580 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:24,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:24,782 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-14 12:52:24,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:24,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91318155] [2020-09-14 12:52:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:24,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91318155] [2020-09-14 12:52:24,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374688902] [2020-09-14 12:52:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:25,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:25,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:25,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:25,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113037959] [2020-09-14 12:52:25,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:25,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:25,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:25,073 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:25,513 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-14 12:52:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:52:25,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:25,515 INFO L225 Difference]: With dead ends: 98 [2020-09-14 12:52:25,515 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:52:25,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:52:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:52:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-14 12:52:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:25,518 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:25,518 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:25,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:25,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:25,519 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:25,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:25,726 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-14 12:52:25,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:25,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943311947] [2020-09-14 12:52:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:25,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943311947] [2020-09-14 12:52:25,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441237995] [2020-09-14 12:52:25,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:25,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:25,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:25,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:26,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:26,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:26,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841297216] [2020-09-14 12:52:26,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:26,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:26,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:26,012 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:26,574 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-14 12:52:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:26,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:26,575 INFO L225 Difference]: With dead ends: 97 [2020-09-14 12:52:26,575 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:52:26,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:52:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:52:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-14 12:52:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:26,579 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:26,579 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:26,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:26,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:26,580 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:26,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:26,787 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-14 12:52:26,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:26,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911306511] [2020-09-14 12:52:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:26,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911306511] [2020-09-14 12:52:26,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054913381] [2020-09-14 12:52:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:27,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:27,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:27,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:27,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301484483] [2020-09-14 12:52:27,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:27,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:27,082 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:27,581 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-14 12:52:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:27,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:27,583 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:52:27,583 INFO L226 Difference]: Without dead ends: 88 [2020-09-14 12:52:27,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-14 12:52:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-14 12:52:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:27,585 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:27,586 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:27,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:27,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:27,586 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:27,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-14 12:52:27,787 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-14 12:52:27,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:27,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180436570] [2020-09-14 12:52:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:27,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180436570] [2020-09-14 12:52:27,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584965967] [2020-09-14 12:52:27,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:28,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:28,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:28,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:28,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:28,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:28,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713453628] [2020-09-14 12:52:28,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:28,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:28,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:28,075 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:28,729 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-14 12:52:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:28,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:28,731 INFO L225 Difference]: With dead ends: 93 [2020-09-14 12:52:28,732 INFO L226 Difference]: Without dead ends: 87 [2020-09-14 12:52:28,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-14 12:52:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-14 12:52:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:28,735 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:28,735 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:28,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:28,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:28,735 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:28,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:28,936 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-14 12:52:28,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:28,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317079321] [2020-09-14 12:52:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:29,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317079321] [2020-09-14 12:52:29,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609113737] [2020-09-14 12:52:29,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:29,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:29,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:29,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:29,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:29,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:29,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239577515] [2020-09-14 12:52:29,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:29,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:29,206 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:29,761 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-14 12:52:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:29,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:29,763 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:52:29,764 INFO L226 Difference]: Without dead ends: 84 [2020-09-14 12:52:29,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-14 12:52:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-14 12:52:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:29,767 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:29,767 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:29,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:29,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:29,768 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:29,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-14 12:52:29,969 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:29,969 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-14 12:52:29,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:29,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704695544] [2020-09-14 12:52:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:30,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704695544] [2020-09-14 12:52:30,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675450409] [2020-09-14 12:52:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:30,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:30,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:30,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:30,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:30,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:30,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:30,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:30,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330622581] [2020-09-14 12:52:30,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:30,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:30,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:30,248 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:30,957 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-14 12:52:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:30,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:30,959 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:52:30,959 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:52:30,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:52:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-14 12:52:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:30,962 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:30,962 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:30,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:30,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:30,963 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:31,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:31,164 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-14 12:52:31,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:31,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666954214] [2020-09-14 12:52:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:31,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666954214] [2020-09-14 12:52:31,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757989303] [2020-09-14 12:52:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:31,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:31,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:31,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:31,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:31,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:31,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:31,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742597039] [2020-09-14 12:52:31,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:31,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:31,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:31,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:31,418 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:31,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:31,992 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-14 12:52:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:52:31,993 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:31,994 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:52:31,994 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:52:31,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:52:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-14 12:52:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:31,998 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:31,998 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:31,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:31,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:31,999 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:32,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:32,207 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-14 12:52:32,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:32,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849895408] [2020-09-14 12:52:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:32,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849895408] [2020-09-14 12:52:32,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128613191] [2020-09-14 12:52:32,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:32,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:32,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:32,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:32,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:32,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:32,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:32,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340702842] [2020-09-14 12:52:32,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:32,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:32,490 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:33,295 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-14 12:52:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:52:33,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:33,297 INFO L225 Difference]: With dead ends: 85 [2020-09-14 12:52:33,297 INFO L226 Difference]: Without dead ends: 79 [2020-09-14 12:52:33,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:52:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-14 12:52:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-14 12:52:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:33,300 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:33,300 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:33,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:33,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:33,300 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:33,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:33,501 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-14 12:52:33,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:33,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700070784] [2020-09-14 12:52:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:33,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700070784] [2020-09-14 12:52:33,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990682922] [2020-09-14 12:52:33,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:33,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:33,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:33,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260952299] [2020-09-14 12:52:33,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:33,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:33,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:33,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:33,762 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:34,423 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-14 12:52:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:34,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:34,424 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:52:34,425 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:52:34,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:52:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:52:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-14 12:52:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:52:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-14 12:52:34,431 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-14 12:52:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:34,431 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-14 12:52:34,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-14 12:52:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:34,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:34,432 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:34,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:34,641 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-14 12:52:34,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:34,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868837964] [2020-09-14 12:52:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:34,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868837964] [2020-09-14 12:52:34,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271805150] [2020-09-14 12:52:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:34,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:34,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:34,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:34,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:34,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:34,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:34,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277432932] [2020-09-14 12:52:34,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:34,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:34,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:34,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:34,917 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-14 12:52:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:35,761 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-14 12:52:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:52:35,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:35,763 INFO L225 Difference]: With dead ends: 82 [2020-09-14 12:52:35,763 INFO L226 Difference]: Without dead ends: 74 [2020-09-14 12:52:35,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:52:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-14 12:52:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-14 12:52:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-14 12:52:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-14 12:52:35,766 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-14 12:52:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:35,766 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-14 12:52:35,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-14 12:52:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:35,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:35,767 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:35,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:35,975 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-14 12:52:35,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:35,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691515044] [2020-09-14 12:52:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:36,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691515044] [2020-09-14 12:52:36,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303702672] [2020-09-14 12:52:36,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:36,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:36,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:36,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:36,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:36,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:36,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687774154] [2020-09-14 12:52:36,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:36,253 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-14 12:52:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:37,048 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-14 12:52:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:37,049 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:37,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:37,050 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:52:37,050 INFO L226 Difference]: Without dead ends: 87 [2020-09-14 12:52:37,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:52:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-14 12:52:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-14 12:52:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:52:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-14 12:52:37,053 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-14 12:52:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:37,054 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-14 12:52:37,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:37,054 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-14 12:52:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:37,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:37,054 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:37,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:37,255 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:37,256 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-14 12:52:37,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:37,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792899003] [2020-09-14 12:52:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:37,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792899003] [2020-09-14 12:52:37,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067938165] [2020-09-14 12:52:37,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:37,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:37,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:37,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:37,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:37,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:37,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745501243] [2020-09-14 12:52:37,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:37,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:37,567 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-14 12:52:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:38,426 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-14 12:52:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:38,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:38,427 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:52:38,428 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:52:38,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:52:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:52:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-14 12:52:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:52:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-14 12:52:38,430 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-14 12:52:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:38,430 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-14 12:52:38,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-14 12:52:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:38,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:38,431 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:38,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-14 12:52:38,632 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:38,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-14 12:52:38,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:38,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92631218] [2020-09-14 12:52:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:38,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92631218] [2020-09-14 12:52:38,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484106553] [2020-09-14 12:52:38,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:38,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:52:38,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:38,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:38,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:38,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827264630] [2020-09-14 12:52:38,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:38,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:38,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:38,947 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-14 12:52:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:39,302 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-14 12:52:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:52:39,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:39,304 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:52:39,304 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:52:39,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:52:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:52:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-14 12:52:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-14 12:52:39,307 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-14 12:52:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:39,307 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-14 12:52:39,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-14 12:52:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:39,308 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:39,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:39,508 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-14 12:52:39,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:39,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908862529] [2020-09-14 12:52:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:39,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908862529] [2020-09-14 12:52:39,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596870787] [2020-09-14 12:52:39,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:39,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:52:39,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:39,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:39,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:39,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:39,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:39,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423732365] [2020-09-14 12:52:39,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:39,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:39,865 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-14 12:52:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:40,263 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-14 12:52:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:52:40,264 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:40,265 INFO L225 Difference]: With dead ends: 98 [2020-09-14 12:52:40,265 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:52:40,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:52:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:52:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-14 12:52:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:52:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-14 12:52:40,268 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-14 12:52:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:40,268 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-14 12:52:40,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-14 12:52:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:40,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:40,269 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:40,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-14 12:52:40,470 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-14 12:52:40,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:40,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112470477] [2020-09-14 12:52:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:40,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112470477] [2020-09-14 12:52:40,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738798978] [2020-09-14 12:52:40,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:40,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:40,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:40,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:40,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072278636] [2020-09-14 12:52:40,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:40,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:40,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:40,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:40,794 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-14 12:52:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:41,277 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-14 12:52:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:41,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:41,279 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:52:41,279 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:41,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-14 12:52:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-14 12:52:41,281 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-14 12:52:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:41,282 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-14 12:52:41,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-14 12:52:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:41,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:41,283 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:41,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:41,484 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-14 12:52:41,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:41,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741699220] [2020-09-14 12:52:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:41,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741699220] [2020-09-14 12:52:41,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422506217] [2020-09-14 12:52:41,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:41,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:41,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:41,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:41,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:41,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:41,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553397987] [2020-09-14 12:52:41,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:41,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:41,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:41,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:41,831 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-14 12:52:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:42,369 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-14 12:52:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:42,370 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:42,371 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:52:42,371 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:52:42,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:52:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-14 12:52:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-14 12:52:42,377 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-14 12:52:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:42,377 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-14 12:52:42,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-14 12:52:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:42,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:42,378 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:42,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:42,585 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-14 12:52:42,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:42,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127544665] [2020-09-14 12:52:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:42,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127544665] [2020-09-14 12:52:42,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647666136] [2020-09-14 12:52:42,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:42,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:52:42,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:42,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:42,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:42,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:42,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:42,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237142063] [2020-09-14 12:52:42,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:42,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:42,899 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-14 12:52:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:43,467 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-14 12:52:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:43,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:43,469 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:52:43,470 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:52:43,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:52:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-14 12:52:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-14 12:52:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-14 12:52:43,472 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-14 12:52:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:43,472 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-14 12:52:43,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-14 12:52:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:43,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:43,473 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:43,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-14 12:52:43,681 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:43,682 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-14 12:52:43,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:43,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476964003] [2020-09-14 12:52:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:43,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476964003] [2020-09-14 12:52:43,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748010272] [2020-09-14 12:52:43,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:44,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:44,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:44,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:44,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:44,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917736031] [2020-09-14 12:52:44,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:44,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:44,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:44,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:44,096 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-14 12:52:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:44,716 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-14 12:52:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:44,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:44,717 INFO L225 Difference]: With dead ends: 106 [2020-09-14 12:52:44,717 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:52:44,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:52:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-14 12:52:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:52:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-14 12:52:44,719 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-14 12:52:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:44,720 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-14 12:52:44,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-14 12:52:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:44,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:44,720 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:44,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-14 12:52:44,921 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:44,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-14 12:52:44,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:44,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504748115] [2020-09-14 12:52:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:45,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504748115] [2020-09-14 12:52:45,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882846579] [2020-09-14 12:52:45,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:45,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:52:45,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:45,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:45,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:45,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:45,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349556475] [2020-09-14 12:52:45,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:45,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:45,235 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-14 12:52:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:45,829 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-14 12:52:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:52:45,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:45,831 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:52:45,831 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:52:45,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:52:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-14 12:52:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-14 12:52:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-14 12:52:45,834 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-14 12:52:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:45,834 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-14 12:52:45,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-14 12:52:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:45,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:45,835 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:46,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:46,037 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-14 12:52:46,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:46,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391685503] [2020-09-14 12:52:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:46,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391685503] [2020-09-14 12:52:46,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544934716] [2020-09-14 12:52:46,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:46,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:52:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:46,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:46,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:46,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:46,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617958051] [2020-09-14 12:52:46,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:46,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:46,361 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-14 12:52:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:47,103 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-14 12:52:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:47,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:47,104 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:52:47,105 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:52:47,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:52:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:52:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-14 12:52:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:52:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-14 12:52:47,107 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-14 12:52:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:47,108 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-14 12:52:47,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-14 12:52:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:47,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:47,108 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:47,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-14 12:52:47,312 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:47,312 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-14 12:52:47,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:47,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362458267] [2020-09-14 12:52:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:47,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362458267] [2020-09-14 12:52:47,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379545119] [2020-09-14 12:52:47,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:47,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:47,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:47,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118275451] [2020-09-14 12:52:47,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:47,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:47,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:47,607 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-14 12:52:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:48,280 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-14 12:52:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:48,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:48,282 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:52:48,283 INFO L226 Difference]: Without dead ends: 99 [2020-09-14 12:52:48,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:52:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-14 12:52:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-14 12:52:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:48,286 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-14 12:52:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:48,286 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:48,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:48,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:48,287 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:48,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:48,490 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-14 12:52:48,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:48,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036997261] [2020-09-14 12:52:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:48,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036997261] [2020-09-14 12:52:48,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282480230] [2020-09-14 12:52:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:48,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:48,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:48,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:48,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:48,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:48,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:48,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:48,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604879437] [2020-09-14 12:52:48,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:48,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:48,801 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-14 12:52:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:49,643 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-14 12:52:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:52:49,644 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:49,644 INFO L225 Difference]: With dead ends: 102 [2020-09-14 12:52:49,644 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:52:49,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:52:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:52:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-14 12:52:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:49,646 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-14 12:52:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:49,647 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:49,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:49,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:49,647 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:49,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-14 12:52:49,848 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-14 12:52:49,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:49,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016006380] [2020-09-14 12:52:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:50,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016006380] [2020-09-14 12:52:50,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302625989] [2020-09-14 12:52:50,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:50,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:52:50,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:50,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:50,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:50,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:50,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133745174] [2020-09-14 12:52:50,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:50,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:50,143 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-14 12:52:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:50,869 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-14 12:52:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:52:50,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:50,871 INFO L225 Difference]: With dead ends: 103 [2020-09-14 12:52:50,872 INFO L226 Difference]: Without dead ends: 97 [2020-09-14 12:52:50,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:52:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-14 12:52:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-14 12:52:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:52:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-14 12:52:50,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-14 12:52:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:50,875 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-14 12:52:50,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-14 12:52:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:50,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:50,875 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:51,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:51,077 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-14 12:52:51,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:51,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237168283] [2020-09-14 12:52:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:51,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237168283] [2020-09-14 12:52:51,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319934039] [2020-09-14 12:52:51,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:51,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:51,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:51,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:51,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:51,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818069629] [2020-09-14 12:52:51,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:51,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:51,389 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-14 12:52:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:52,311 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-14 12:52:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:52:52,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:52,313 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:52:52,313 INFO L226 Difference]: Without dead ends: 94 [2020-09-14 12:52:52,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:52:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-14 12:52:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-14 12:52:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:52:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-14 12:52:52,317 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-14 12:52:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:52,317 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-14 12:52:52,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-14 12:52:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:52,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:52,318 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:52,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-14 12:52:52,520 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-14 12:52:52,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:52,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196123382] [2020-09-14 12:52:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:52,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196123382] [2020-09-14 12:52:52,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74286688] [2020-09-14 12:52:52,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:52,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:52:52,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:52,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:52,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:52,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951714313] [2020-09-14 12:52:52,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:52,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:52,809 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-14 12:52:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:53,629 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-14 12:52:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:52:53,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:53,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:53,631 INFO L225 Difference]: With dead ends: 120 [2020-09-14 12:52:53,631 INFO L226 Difference]: Without dead ends: 114 [2020-09-14 12:52:53,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:52:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-14 12:52:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-14 12:52:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:52:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-14 12:52:53,639 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-14 12:52:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:53,640 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-14 12:52:53,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-14 12:52:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:53,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:53,640 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:53,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-14 12:52:53,841 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:53,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-14 12:52:53,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:53,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751491562] [2020-09-14 12:52:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:54,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751491562] [2020-09-14 12:52:54,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893765328] [2020-09-14 12:52:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:54,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:52:54,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:54,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:54,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:54,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:54,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:54,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786467744] [2020-09-14 12:52:54,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:54,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:54,168 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-14 12:52:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:55,135 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-14 12:52:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:52:55,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:55,137 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:52:55,137 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:55,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:52:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-14 12:52:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-14 12:52:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-14 12:52:55,139 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-14 12:52:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:55,139 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-14 12:52:55,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-14 12:52:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:55,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:55,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:55,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:55,341 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-14 12:52:55,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:55,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860826769] [2020-09-14 12:52:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:55,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860826769] [2020-09-14 12:52:55,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730184436] [2020-09-14 12:52:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:55,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:55,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:55,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:55,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:52:55,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307468916] [2020-09-14 12:52:55,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:55,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:55,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:55,699 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-14 12:52:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:56,142 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-14 12:52:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:52:56,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:52:56,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:56,143 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:52:56,143 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:52:56,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:52:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-14 12:52:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:52:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:52:56,146 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:52:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:56,146 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:52:56,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:52:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:56,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:56,147 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:56,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:56,357 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-14 12:52:56,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:56,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296068715] [2020-09-14 12:52:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:56,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296068715] [2020-09-14 12:52:56,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188746833] [2020-09-14 12:52:56,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:56,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:56,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:56,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:56,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:52:56,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682946495] [2020-09-14 12:52:56,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:52:56,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:52:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:52:56,751 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:52:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:57,326 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-14 12:52:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:57,327 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:52:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:57,327 INFO L225 Difference]: With dead ends: 111 [2020-09-14 12:52:57,328 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:52:57,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:52:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-14 12:52:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:52:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:52:57,330 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:52:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:57,331 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:52:57,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:52:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:52:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:57,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:57,331 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:57,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-14 12:52:57,532 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-14 12:52:57,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:57,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310736905] [2020-09-14 12:52:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:57,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310736905] [2020-09-14 12:52:57,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145455425] [2020-09-14 12:52:57,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:57,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:52:57,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:57,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:57,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:57,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:52:57,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32899118] [2020-09-14 12:52:57,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:57,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:57,870 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:52:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:58,412 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-14 12:52:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:58,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:52:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:58,413 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:52:58,414 INFO L226 Difference]: Without dead ends: 102 [2020-09-14 12:52:58,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-14 12:52:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-14 12:52:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:52:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:52:58,415 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:52:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:58,416 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:52:58,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:52:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:58,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:58,416 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:58,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:58,623 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:58,624 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-14 12:52:58,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:58,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023419832] [2020-09-14 12:52:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:58,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023419832] [2020-09-14 12:52:58,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435575255] [2020-09-14 12:52:58,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:58,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:58,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:58,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:59,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:59,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:52:59,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020067850] [2020-09-14 12:52:59,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:52:59,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:59,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:52:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:52:59,003 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:52:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:59,678 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-14 12:52:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:59,679 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:52:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:59,679 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:52:59,679 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:52:59,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:52:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-14 12:52:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:52:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:52:59,683 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:52:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:59,683 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:52:59,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:52:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:52:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:59,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:59,684 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:59,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-14 12:52:59,891 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-14 12:52:59,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:59,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783272608] [2020-09-14 12:52:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:00,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783272608] [2020-09-14 12:53:00,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733691930] [2020-09-14 12:53:00,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:00,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:53:00,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:00,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:00,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:00,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:00,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347008894] [2020-09-14 12:53:00,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:00,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:00,225 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:00,825 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-14 12:53:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:53:00,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:00,826 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:53:00,826 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:53:00,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:53:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:53:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-14 12:53:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:00,829 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:53:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:00,829 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:00,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:00,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:00,830 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:01,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-14 12:53:01,033 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:01,034 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-14 12:53:01,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:01,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711222245] [2020-09-14 12:53:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:01,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711222245] [2020-09-14 12:53:01,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609964458] [2020-09-14 12:53:01,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:01,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:53:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:01,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:01,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:01,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:01,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555596805] [2020-09-14 12:53:01,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:01,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:01,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:01,382 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:53:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:02,170 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-14 12:53:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:53:02,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:02,172 INFO L225 Difference]: With dead ends: 103 [2020-09-14 12:53:02,172 INFO L226 Difference]: Without dead ends: 97 [2020-09-14 12:53:02,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:53:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-14 12:53:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-14 12:53:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:02,175 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:53:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:02,175 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:02,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:02,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:02,176 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:02,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-14 12:53:02,384 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-14 12:53:02,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:02,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004258284] [2020-09-14 12:53:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:02,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004258284] [2020-09-14 12:53:02,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715333765] [2020-09-14 12:53:02,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:02,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:02,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:02,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:02,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471221995] [2020-09-14 12:53:02,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:02,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:02,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:02,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:02,707 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:03,386 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-14 12:53:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:53:03,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:03,387 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:53:03,388 INFO L226 Difference]: Without dead ends: 94 [2020-09-14 12:53:03,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:53:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-14 12:53:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-14 12:53:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:03,390 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:53:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:03,390 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:03,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:03,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:03,391 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:03,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:03,592 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-14 12:53:03,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:03,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927081552] [2020-09-14 12:53:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:03,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927081552] [2020-09-14 12:53:03,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628099659] [2020-09-14 12:53:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:03,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:03,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:03,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:03,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:03,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:03,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661418599] [2020-09-14 12:53:03,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:03,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:03,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:03,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:03,943 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:53:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:04,815 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-14 12:53:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:53:04,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:04,816 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:53:04,816 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:53:04,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:53:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:53:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-14 12:53:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:04,819 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:53:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:04,819 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:04,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:04,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:04,820 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:05,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-14 12:53:05,021 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-14 12:53:05,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:05,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594137172] [2020-09-14 12:53:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:05,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594137172] [2020-09-14 12:53:05,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662295582] [2020-09-14 12:53:05,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:05,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:53:05,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:05,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:05,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:05,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:05,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43229245] [2020-09-14 12:53:05,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:05,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:05,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:05,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:05,339 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:06,079 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-14 12:53:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:53:06,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:06,081 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:53:06,081 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:53:06,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:53:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:53:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-14 12:53:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:06,084 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:53:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:06,084 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:06,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:06,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:06,084 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:06,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:06,287 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-14 12:53:06,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:06,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298017020] [2020-09-14 12:53:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:06,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298017020] [2020-09-14 12:53:06,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828858345] [2020-09-14 12:53:06,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:06,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:06,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:06,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:06,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:06,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074764588] [2020-09-14 12:53:06,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:06,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:06,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:06,629 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:53:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:07,609 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-14 12:53:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:53:07,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:07,611 INFO L225 Difference]: With dead ends: 95 [2020-09-14 12:53:07,611 INFO L226 Difference]: Without dead ends: 89 [2020-09-14 12:53:07,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:53:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-14 12:53:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-14 12:53:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:07,613 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:53:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:07,613 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:07,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:07,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:07,614 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:07,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:07,815 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-14 12:53:07,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:07,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330363888] [2020-09-14 12:53:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:08,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330363888] [2020-09-14 12:53:08,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4756856] [2020-09-14 12:53:08,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:08,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:53:08,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:08,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:08,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:08,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182563779] [2020-09-14 12:53:08,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:08,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:08,126 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:08,962 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-14 12:53:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:53:08,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:08,964 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:53:08,964 INFO L226 Difference]: Without dead ends: 86 [2020-09-14 12:53:08,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:53:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-14 12:53:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-14 12:53:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:08,967 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:53:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:08,967 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:08,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:08,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:08,968 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:09,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:09,176 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-14 12:53:09,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:09,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003159633] [2020-09-14 12:53:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:09,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003159633] [2020-09-14 12:53:09,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898123398] [2020-09-14 12:53:09,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:09,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:53:09,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:09,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:09,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:09,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:09,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853617552] [2020-09-14 12:53:09,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:09,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:09,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:09,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:09,505 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:53:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:10,527 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-14 12:53:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:53:10,528 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:10,529 INFO L225 Difference]: With dead ends: 91 [2020-09-14 12:53:10,529 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:53:10,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:53:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:53:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-14 12:53:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:10,532 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:53:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:10,532 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:10,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:10,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:10,533 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:10,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:10,741 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:10,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-14 12:53:10,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:10,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369366527] [2020-09-14 12:53:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:10,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369366527] [2020-09-14 12:53:10,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985117049] [2020-09-14 12:53:10,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:11,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:11,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:11,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:11,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471433227] [2020-09-14 12:53:11,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:11,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:11,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:11,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:11,050 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:11,922 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-14 12:53:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:11,923 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:11,923 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:53:11,923 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:53:11,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:53:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:53:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-14 12:53:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-14 12:53:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-14 12:53:11,927 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-14 12:53:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:11,927 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-14 12:53:11,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-14 12:53:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:11,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:11,928 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:12,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-14 12:53:12,129 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:12,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-14 12:53:12,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:12,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811749107] [2020-09-14 12:53:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:12,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811749107] [2020-09-14 12:53:12,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067891862] [2020-09-14 12:53:12,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:12,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:12,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:12,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:12,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:12,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505775899] [2020-09-14 12:53:12,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:12,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:12,484 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-14 12:53:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:13,542 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-14 12:53:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:53:13,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:13,544 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:53:13,544 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:53:13,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:53:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-14 12:53:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:53:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-14 12:53:13,546 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-14 12:53:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:13,546 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-14 12:53:13,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-14 12:53:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:13,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:13,550 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:13,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-14 12:53:13,751 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:13,752 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-14 12:53:13,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:13,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579774661] [2020-09-14 12:53:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:13,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579774661] [2020-09-14 12:53:13,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236703069] [2020-09-14 12:53:13,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:14,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:53:14,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:14,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:53:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:14,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:14,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:14,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152594187] [2020-09-14 12:53:14,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:14,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:14,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:14,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:14,096 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-14 12:53:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:15,144 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-14 12:53:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:15,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:15,146 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:53:15,146 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:53:15,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:53:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-14 12:53:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:53:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-14 12:53:15,148 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-14 12:53:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:15,149 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-14 12:53:15,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-14 12:53:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:15,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:15,149 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:15,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-14 12:53:15,350 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:15,351 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-14 12:53:15,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:15,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301813081] [2020-09-14 12:53:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:15,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301813081] [2020-09-14 12:53:15,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907098544] [2020-09-14 12:53:15,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:15,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:15,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:15,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:53:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:15,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:15,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:15,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333942299] [2020-09-14 12:53:15,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:15,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:15,693 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-14 12:53:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:16,818 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-14 12:53:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:16,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:16,820 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:53:16,820 INFO L226 Difference]: Without dead ends: 79 [2020-09-14 12:53:16,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:53:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-14 12:53:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-14 12:53:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:53:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-14 12:53:16,823 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-14 12:53:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:16,823 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-14 12:53:16,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-14 12:53:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:16,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:16,824 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:17,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-14 12:53:17,032 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-14 12:53:17,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:17,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456069716] [2020-09-14 12:53:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:17,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456069716] [2020-09-14 12:53:17,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925954080] [2020-09-14 12:53:17,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:17,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:17,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:17,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:17,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648405611] [2020-09-14 12:53:17,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:17,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:17,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:17,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:17,426 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-14 12:53:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:17,912 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-14 12:53:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:53:17,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:17,913 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:53:17,913 INFO L226 Difference]: Without dead ends: 84 [2020-09-14 12:53:17,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:53:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-14 12:53:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-14 12:53:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:53:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-14 12:53:17,916 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-14 12:53:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:17,916 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-14 12:53:17,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-14 12:53:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:17,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:17,920 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:18,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:18,132 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-14 12:53:18,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:18,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102377198] [2020-09-14 12:53:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:18,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102377198] [2020-09-14 12:53:18,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910091074] [2020-09-14 12:53:18,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:18,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:18,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:18,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:18,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:18,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:18,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:18,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:18,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141374476] [2020-09-14 12:53:18,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:18,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:18,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:18,625 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-14 12:53:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:19,117 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-14 12:53:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:53:19,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:19,119 INFO L225 Difference]: With dead ends: 106 [2020-09-14 12:53:19,120 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:53:19,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:53:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:53:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-14 12:53:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:53:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-14 12:53:19,122 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-14 12:53:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:19,123 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-14 12:53:19,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-14 12:53:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:19,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:19,123 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:19,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-14 12:53:19,326 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:19,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-14 12:53:19,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:19,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954940754] [2020-09-14 12:53:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:19,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954940754] [2020-09-14 12:53:19,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656862105] [2020-09-14 12:53:19,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:19,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:19,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:19,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519331578] [2020-09-14 12:53:19,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:19,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:19,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:19,722 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-14 12:53:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:20,317 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-14 12:53:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:53:20,318 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:20,319 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:53:20,319 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:53:20,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:53:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:53:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-14 12:53:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-14 12:53:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-14 12:53:20,322 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-14 12:53:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:20,322 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-14 12:53:20,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-14 12:53:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:20,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:20,322 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:20,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-14 12:53:20,523 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:20,524 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-14 12:53:20,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:20,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716384007] [2020-09-14 12:53:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:20,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716384007] [2020-09-14 12:53:20,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753753956] [2020-09-14 12:53:20,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:20,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:20,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:20,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:20,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:20,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881167360] [2020-09-14 12:53:20,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:20,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:20,949 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-14 12:53:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:21,600 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-14 12:53:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:53:21,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:21,601 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:53:21,602 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:53:21,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:53:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:53:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-14 12:53:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:53:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-14 12:53:21,604 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-14 12:53:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:21,604 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-14 12:53:21,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-14 12:53:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:21,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:21,605 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:21,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-14 12:53:21,805 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:21,806 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-14 12:53:21,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:21,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277213647] [2020-09-14 12:53:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:22,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277213647] [2020-09-14 12:53:22,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305763692] [2020-09-14 12:53:22,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:22,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:22,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:22,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:22,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:22,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680368491] [2020-09-14 12:53:22,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:22,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:22,182 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-14 12:53:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:22,828 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-14 12:53:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:53:22,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:22,830 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:53:22,830 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:53:22,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:53:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:53:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-14 12:53:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:53:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-14 12:53:22,832 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-14 12:53:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:22,832 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-14 12:53:22,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-14 12:53:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:22,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:22,833 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:23,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:23,037 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-14 12:53:23,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:23,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998059580] [2020-09-14 12:53:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:23,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998059580] [2020-09-14 12:53:23,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227626946] [2020-09-14 12:53:23,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:23,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:23,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:23,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:23,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:23,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:23,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004473273] [2020-09-14 12:53:23,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:23,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:23,438 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-14 12:53:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:24,184 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-14 12:53:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:53:24,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:24,186 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:53:24,186 INFO L226 Difference]: Without dead ends: 110 [2020-09-14 12:53:24,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:53:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-14 12:53:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-14 12:53:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:53:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-14 12:53:24,187 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-14 12:53:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:24,188 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-14 12:53:24,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-14 12:53:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:24,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:24,188 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:24,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:24,389 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-14 12:53:24,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:24,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577326469] [2020-09-14 12:53:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:24,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577326469] [2020-09-14 12:53:24,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111054100] [2020-09-14 12:53:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:24,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:24,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:24,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:24,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:24,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457513637] [2020-09-14 12:53:24,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:24,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:24,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:24,759 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-14 12:53:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:25,466 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-14 12:53:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:53:25,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:25,467 INFO L225 Difference]: With dead ends: 117 [2020-09-14 12:53:25,467 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:53:25,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:53:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:53:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-14 12:53:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:53:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-14 12:53:25,470 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-14 12:53:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:25,470 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-14 12:53:25,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-14 12:53:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:25,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:25,470 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:25,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:25,672 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-14 12:53:25,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:25,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360465884] [2020-09-14 12:53:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:25,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360465884] [2020-09-14 12:53:25,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822321100] [2020-09-14 12:53:25,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:26,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:26,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:26,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:26,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:26,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:26,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865097277] [2020-09-14 12:53:26,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:26,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:26,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:26,071 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-14 12:53:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:26,920 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-14 12:53:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:53:26,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:26,921 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:53:26,922 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:53:26,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:53:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:53:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-14 12:53:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:53:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-14 12:53:26,924 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-14 12:53:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:26,924 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-14 12:53:26,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:26,924 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-14 12:53:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:26,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:26,925 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:27,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-14 12:53:27,131 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-14 12:53:27,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:27,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580583415] [2020-09-14 12:53:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:27,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580583415] [2020-09-14 12:53:27,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883508409] [2020-09-14 12:53:27,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:27,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:27,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:27,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626167957] [2020-09-14 12:53:27,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:27,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:27,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:27,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:27,473 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-14 12:53:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:28,264 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-14 12:53:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:53:28,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:28,266 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:53:28,266 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:53:28,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:53:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:53:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-14 12:53:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-14 12:53:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-14 12:53:28,269 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-14 12:53:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:28,269 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-14 12:53:28,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-14 12:53:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:28,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:28,270 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:28,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:28,479 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:28,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-14 12:53:28,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:28,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798907227] [2020-09-14 12:53:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:28,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798907227] [2020-09-14 12:53:28,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224667017] [2020-09-14 12:53:28,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:28,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:28,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:28,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:28,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:28,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:28,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:28,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591018601] [2020-09-14 12:53:28,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:28,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:28,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:28,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:28,852 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-14 12:53:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:29,811 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-14 12:53:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:53:29,812 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:29,813 INFO L225 Difference]: With dead ends: 112 [2020-09-14 12:53:29,813 INFO L226 Difference]: Without dead ends: 106 [2020-09-14 12:53:29,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:53:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-14 12:53:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-14 12:53:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:53:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-14 12:53:29,815 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-14 12:53:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:29,816 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-14 12:53:29,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-14 12:53:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:29,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:29,816 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:30,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-14 12:53:30,017 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-14 12:53:30,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:30,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646280692] [2020-09-14 12:53:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:30,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646280692] [2020-09-14 12:53:30,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273716673] [2020-09-14 12:53:30,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:30,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:30,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:30,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:30,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449291344] [2020-09-14 12:53:30,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:30,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:30,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:30,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:30,359 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-14 12:53:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:31,218 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-14 12:53:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:31,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:31,219 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:53:31,220 INFO L226 Difference]: Without dead ends: 107 [2020-09-14 12:53:31,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:53:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-14 12:53:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-14 12:53:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:31,221 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-14 12:53:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:31,222 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:31,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:31,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:31,222 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:31,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-14 12:53:31,428 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-14 12:53:31,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:31,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262602703] [2020-09-14 12:53:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:31,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262602703] [2020-09-14 12:53:31,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328630388] [2020-09-14 12:53:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:31,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:31,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:31,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:31,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:31,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:31,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813905781] [2020-09-14 12:53:31,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:31,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:31,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:31,803 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-14 12:53:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:32,848 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-14 12:53:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:53:32,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:32,850 INFO L225 Difference]: With dead ends: 110 [2020-09-14 12:53:32,850 INFO L226 Difference]: Without dead ends: 104 [2020-09-14 12:53:32,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:53:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-14 12:53:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-14 12:53:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:32,853 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-14 12:53:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:32,853 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:32,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:32,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:32,854 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:33,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-14 12:53:33,055 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-14 12:53:33,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:33,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437819548] [2020-09-14 12:53:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:33,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437819548] [2020-09-14 12:53:33,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489761390] [2020-09-14 12:53:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:33,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:33,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:33,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:33,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435779767] [2020-09-14 12:53:33,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:33,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:33,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:33,405 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-14 12:53:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:34,366 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-14 12:53:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:53:34,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:34,368 INFO L225 Difference]: With dead ends: 111 [2020-09-14 12:53:34,368 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:53:34,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:53:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-14 12:53:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:53:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-14 12:53:34,371 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-14 12:53:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:34,371 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-14 12:53:34,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-14 12:53:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:34,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:34,371 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:34,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:34,572 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:34,573 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-14 12:53:34,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:34,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066894377] [2020-09-14 12:53:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:34,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066894377] [2020-09-14 12:53:34,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058633511] [2020-09-14 12:53:34,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:34,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:34,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:34,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:34,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:34,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336985892] [2020-09-14 12:53:34,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:34,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:34,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:34,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:34,936 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-14 12:53:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:36,111 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-14 12:53:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:53:36,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:36,113 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:53:36,113 INFO L226 Difference]: Without dead ends: 102 [2020-09-14 12:53:36,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:53:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-14 12:53:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-14 12:53:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:53:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-14 12:53:36,117 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-14 12:53:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:36,117 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-14 12:53:36,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-14 12:53:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:36,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:36,118 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:36,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-14 12:53:36,326 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-14 12:53:36,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:36,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658747221] [2020-09-14 12:53:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:36,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658747221] [2020-09-14 12:53:36,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171376900] [2020-09-14 12:53:36,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:36,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:36,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:36,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:36,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336095269] [2020-09-14 12:53:36,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:36,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:36,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:36,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:36,662 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-14 12:53:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:37,667 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-14 12:53:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:53:37,668 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:37,669 INFO L225 Difference]: With dead ends: 128 [2020-09-14 12:53:37,669 INFO L226 Difference]: Without dead ends: 122 [2020-09-14 12:53:37,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:53:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-14 12:53:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-14 12:53:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:53:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-14 12:53:37,671 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-14 12:53:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:37,671 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-14 12:53:37,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-14 12:53:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:37,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:37,671 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:37,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:37,872 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:37,873 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-14 12:53:37,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:37,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045810195] [2020-09-14 12:53:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:38,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045810195] [2020-09-14 12:53:38,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672431558] [2020-09-14 12:53:38,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:38,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:38,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:38,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:38,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:38,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:38,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450931401] [2020-09-14 12:53:38,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:38,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:38,233 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-14 12:53:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:39,436 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-14 12:53:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:53:39,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:39,437 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:53:39,438 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:53:39,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:53:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:53:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-14 12:53:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:53:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-14 12:53:39,440 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-14 12:53:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:39,441 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-14 12:53:39,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-14 12:53:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:39,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:39,442 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:39,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:39,642 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-14 12:53:39,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:39,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476802373] [2020-09-14 12:53:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:39,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476802373] [2020-09-14 12:53:39,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149227159] [2020-09-14 12:53:39,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:40,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:40,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:40,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:40,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:40,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:40,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468666024] [2020-09-14 12:53:40,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:40,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:40,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:40,076 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-14 12:53:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:40,645 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-14 12:53:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:53:40,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:40,647 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:53:40,647 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:53:40,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:53:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:53:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-14 12:53:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:40,650 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:40,650 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:40,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:40,651 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:40,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:40,860 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-14 12:53:40,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:40,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537065460] [2020-09-14 12:53:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:41,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537065460] [2020-09-14 12:53:41,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109747271] [2020-09-14 12:53:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:41,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:41,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:41,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:41,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:41,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:41,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:41,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741500760] [2020-09-14 12:53:41,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:41,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:41,330 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:42,021 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-14 12:53:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:53:42,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:42,023 INFO L225 Difference]: With dead ends: 121 [2020-09-14 12:53:42,023 INFO L226 Difference]: Without dead ends: 115 [2020-09-14 12:53:42,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:53:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-14 12:53:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-14 12:53:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:42,026 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:42,026 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:42,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:42,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:42,026 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:42,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:42,227 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-14 12:53:42,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:42,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637604569] [2020-09-14 12:53:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:42,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637604569] [2020-09-14 12:53:42,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317891242] [2020-09-14 12:53:42,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:42,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:42,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:42,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:42,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573044674] [2020-09-14 12:53:42,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:42,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:42,671 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:43,323 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-14 12:53:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:53:43,324 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:43,325 INFO L225 Difference]: With dead ends: 118 [2020-09-14 12:53:43,325 INFO L226 Difference]: Without dead ends: 112 [2020-09-14 12:53:43,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:53:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-14 12:53:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-14 12:53:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:43,334 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:43,334 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:43,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:43,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:43,334 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:43,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:43,535 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-14 12:53:43,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:43,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421817733] [2020-09-14 12:53:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:43,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421817733] [2020-09-14 12:53:43,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412650769] [2020-09-14 12:53:43,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:43,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:43,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:43,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:43,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:43,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380688661] [2020-09-14 12:53:43,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:43,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:43,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:43,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:43,981 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:44,780 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-14 12:53:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:53:44,781 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:44,782 INFO L225 Difference]: With dead ends: 117 [2020-09-14 12:53:44,782 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:53:44,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:53:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:53:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-14 12:53:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:44,785 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:44,785 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:44,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:44,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:44,786 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:44,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-14 12:53:44,987 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-14 12:53:44,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:44,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509078819] [2020-09-14 12:53:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:45,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509078819] [2020-09-14 12:53:45,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292708490] [2020-09-14 12:53:45,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:45,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:45,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:45,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798893716] [2020-09-14 12:53:45,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:45,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:45,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:45,396 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:46,106 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-14 12:53:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:53:46,106 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:46,107 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:53:46,107 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:53:46,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:53:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:53:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-14 12:53:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:46,109 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:46,110 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:46,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:46,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:46,110 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:46,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-14 12:53:46,313 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-14 12:53:46,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:46,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477508976] [2020-09-14 12:53:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:46,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477508976] [2020-09-14 12:53:46,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416324001] [2020-09-14 12:53:46,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:46,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:46,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:46,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:46,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:46,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:46,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:46,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:46,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420234722] [2020-09-14 12:53:46,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:46,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:46,735 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:47,650 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-14 12:53:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:53:47,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:47,652 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:53:47,652 INFO L226 Difference]: Without dead ends: 107 [2020-09-14 12:53:47,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:53:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-14 12:53:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-14 12:53:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:47,655 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:47,655 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:47,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:47,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:47,656 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:47,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-14 12:53:47,862 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-14 12:53:47,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:47,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266719198] [2020-09-14 12:53:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:48,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266719198] [2020-09-14 12:53:48,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843797177] [2020-09-14 12:53:48,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:48,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:48,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:48,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:48,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:48,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035855974] [2020-09-14 12:53:48,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:48,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:48,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:48,258 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:49,064 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-14 12:53:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:53:49,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:49,065 INFO L225 Difference]: With dead ends: 110 [2020-09-14 12:53:49,065 INFO L226 Difference]: Without dead ends: 104 [2020-09-14 12:53:49,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:53:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-14 12:53:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-14 12:53:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:49,068 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:49,068 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:49,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:49,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:49,069 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:49,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-14 12:53:49,270 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-14 12:53:49,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:49,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842977018] [2020-09-14 12:53:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:49,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842977018] [2020-09-14 12:53:49,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462715956] [2020-09-14 12:53:49,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:49,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:49,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:49,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:49,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:49,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:49,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665464479] [2020-09-14 12:53:49,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:49,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:49,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:49,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:49,691 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:50,723 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-14 12:53:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:53:50,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:50,725 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:53:50,725 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:53:50,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:53:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:53:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-14 12:53:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:50,727 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:50,728 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:50,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:50,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:50,728 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:50,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:50,929 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:50,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-14 12:53:50,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:50,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017226561] [2020-09-14 12:53:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:51,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017226561] [2020-09-14 12:53:51,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435122638] [2020-09-14 12:53:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:51,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:51,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:51,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:51,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:51,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194561907] [2020-09-14 12:53:51,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:51,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:51,314 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:52,203 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-14 12:53:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:53:52,204 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:52,205 INFO L225 Difference]: With dead ends: 106 [2020-09-14 12:53:52,205 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:53:52,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:53:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:53:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-14 12:53:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:52,208 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:52,208 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:52,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:52,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:52,209 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:52,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-14 12:53:52,409 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-14 12:53:52,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:52,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646942477] [2020-09-14 12:53:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:52,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646942477] [2020-09-14 12:53:52,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508223940] [2020-09-14 12:53:52,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:52,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:52,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:52,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:52,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:52,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:52,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:52,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:52,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061933017] [2020-09-14 12:53:52,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:52,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:52,826 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:53,959 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-14 12:53:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:53:53,960 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:53,961 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:53:53,961 INFO L226 Difference]: Without dead ends: 99 [2020-09-14 12:53:53,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-14 12:53:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-14 12:53:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:53,964 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:53,964 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:53,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:53,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:53,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:54,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:54,165 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-14 12:53:54,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:54,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414505891] [2020-09-14 12:53:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:54,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414505891] [2020-09-14 12:53:54,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417911389] [2020-09-14 12:53:54,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:54,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:54,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:54,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:54,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649040278] [2020-09-14 12:53:54,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:54,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:54,550 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:55,505 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-14 12:53:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:55,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:55,506 INFO L225 Difference]: With dead ends: 102 [2020-09-14 12:53:55,507 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:53:55,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:53:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:53:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-14 12:53:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:55,510 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:55,510 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:55,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:55,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:55,511 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:55,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:55,717 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-14 12:53:55,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:55,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617514321] [2020-09-14 12:53:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:55,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617514321] [2020-09-14 12:53:55,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941218565] [2020-09-14 12:53:55,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:56,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:56,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:56,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:56,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:56,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334307451] [2020-09-14 12:53:56,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:56,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:56,108 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:57,361 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-14 12:53:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:53:57,362 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:57,363 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:53:57,363 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:53:57,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:53:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:53:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-14 12:53:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:57,365 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:57,366 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:57,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:57,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:57,367 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:57,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-14 12:53:57,573 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-14 12:53:57,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:57,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698773503] [2020-09-14 12:53:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:57,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698773503] [2020-09-14 12:53:57,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234807317] [2020-09-14 12:53:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:57,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:57,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:57,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:57,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:57,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:57,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:57,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039101999] [2020-09-14 12:53:57,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:57,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:57,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:57,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:57,950 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:58,988 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-14 12:53:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:53:58,989 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:58,990 INFO L225 Difference]: With dead ends: 98 [2020-09-14 12:53:58,990 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:53:58,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:53:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:53:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-14 12:53:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:58,993 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:58,993 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:58,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:58,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:58,994 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:59,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:59,195 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-14 12:53:59,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:59,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486357702] [2020-09-14 12:53:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:59,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486357702] [2020-09-14 12:53:59,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240543889] [2020-09-14 12:53:59,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:59,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:59,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:59,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:59,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:59,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:59,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136022187] [2020-09-14 12:53:59,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:59,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:59,604 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:54:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:00,945 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-14 12:54:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:54:00,946 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:54:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:00,947 INFO L225 Difference]: With dead ends: 97 [2020-09-14 12:54:00,947 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:54:00,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:54:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:54:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-14 12:54:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:54:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:54:00,950 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:54:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:00,950 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:54:00,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:54:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:54:00,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:00,950 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:01,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-14 12:54:01,151 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-14 12:54:01,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:01,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957746231] [2020-09-14 12:54:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:01,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957746231] [2020-09-14 12:54:01,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609689830] [2020-09-14 12:54:01,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:01,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:54:01,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:54:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:01,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:01,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:54:01,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526169605] [2020-09-14 12:54:01,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:54:01,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:54:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:54:01,536 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:54:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:02,652 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-14 12:54:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:02,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:54:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:02,654 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:54:02,654 INFO L226 Difference]: Without dead ends: 107 [2020-09-14 12:54:02,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:54:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-14 12:54:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-14 12:54:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-14 12:54:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-14 12:54:02,656 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-14 12:54:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:02,656 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-14 12:54:02,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:54:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-14 12:54:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:54:02,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:02,657 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:02,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-14 12:54:02,857 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:02,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:02,858 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-14 12:54:02,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:02,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914247543] [2020-09-14 12:54:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:03,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914247543] [2020-09-14 12:54:03,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758631844] [2020-09-14 12:54:03,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:03,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:54:03,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:03,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:54:03,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:03,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:03,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:03,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:54:03,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476487928] [2020-09-14 12:54:03,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:03,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:03,265 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-14 12:54:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:04,664 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-14 12:54:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:54:04,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:54:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:04,665 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:54:04,665 INFO L226 Difference]: Without dead ends: 86 [2020-09-14 12:54:04,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:54:04,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-14 12:54:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-14 12:54:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:54:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-14 12:54:04,667 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-14 12:54:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:04,668 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-14 12:54:04,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-14 12:54:04,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:54:04,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:04,668 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:04,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-14 12:54:04,869 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-14 12:54:04,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:04,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435518025] [2020-09-14 12:54:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:05,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435518025] [2020-09-14 12:54:05,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023931822] [2020-09-14 12:54:05,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:54:05,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:05,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:54:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:05,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:05,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:54:05,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564509118] [2020-09-14 12:54:05,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:05,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:05,276 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-14 12:54:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:06,603 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-14 12:54:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:06,604 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:54:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:06,604 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:54:06,604 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:54:06,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:54:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:54:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-14 12:54:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:54:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-14 12:54:06,606 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-14 12:54:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:06,606 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-14 12:54:06,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-14 12:54:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:06,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:06,607 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:06,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-14 12:54:06,808 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:06,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:06,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-14 12:54:06,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:06,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370445672] [2020-09-14 12:54:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:07,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370445672] [2020-09-14 12:54:07,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671629280] [2020-09-14 12:54:07,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:07,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:07,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:54:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:07,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:07,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:07,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110781680] [2020-09-14 12:54:07,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:07,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:07,230 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-14 12:54:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:08,662 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-14 12:54:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:08,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:08,664 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:54:08,664 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:54:08,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:54:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:54:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-14 12:54:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:54:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-14 12:54:08,667 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-14 12:54:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:08,667 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-14 12:54:08,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-14 12:54:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:08,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:08,667 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:08,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:08,868 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-14 12:54:08,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:08,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038552905] [2020-09-14 12:54:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:09,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038552905] [2020-09-14 12:54:09,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348962711] [2020-09-14 12:54:09,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:09,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:09,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:09,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:09,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151017919] [2020-09-14 12:54:09,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:09,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:09,351 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-14 12:54:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:09,968 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-14 12:54:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:54:09,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:09,969 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:54:09,970 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:54:09,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:54:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:54:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-14 12:54:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:54:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-14 12:54:09,972 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-14 12:54:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:09,973 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-14 12:54:09,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-14 12:54:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:09,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:09,973 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:10,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:10,174 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-14 12:54:10,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:10,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269503470] [2020-09-14 12:54:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:10,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269503470] [2020-09-14 12:54:10,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728648760] [2020-09-14 12:54:10,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:10,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:10,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:10,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:10,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:10,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:10,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:10,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843293849] [2020-09-14 12:54:10,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:10,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:10,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:10,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:10,681 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-14 12:54:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:11,328 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-14 12:54:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:54:11,329 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:11,330 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:54:11,330 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:54:11,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:54:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:54:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-14 12:54:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:54:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-14 12:54:11,333 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-14 12:54:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:11,333 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-14 12:54:11,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-14 12:54:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:11,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:11,334 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:11,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:11,534 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:11,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:11,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-14 12:54:11,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:11,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084421234] [2020-09-14 12:54:11,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:11,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084421234] [2020-09-14 12:54:11,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88640810] [2020-09-14 12:54:11,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:11,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:11,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:11,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:12,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:12,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:12,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042511380] [2020-09-14 12:54:12,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:12,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:12,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:12,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:12,001 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-14 12:54:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:12,718 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-14 12:54:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:54:12,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:12,720 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:54:12,720 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:54:12,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:54:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:54:12,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-14 12:54:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:54:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-14 12:54:12,723 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-14 12:54:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:12,723 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-14 12:54:12,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-14 12:54:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:12,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:12,724 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:12,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:12,925 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-14 12:54:12,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:12,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776612662] [2020-09-14 12:54:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:13,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776612662] [2020-09-14 12:54:13,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200930873] [2020-09-14 12:54:13,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:13,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:13,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:13,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:13,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:13,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532782827] [2020-09-14 12:54:13,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:13,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:13,437 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-14 12:54:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:14,202 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-14 12:54:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:54:14,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:14,204 INFO L225 Difference]: With dead ends: 129 [2020-09-14 12:54:14,204 INFO L226 Difference]: Without dead ends: 123 [2020-09-14 12:54:14,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:54:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-14 12:54:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-14 12:54:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:54:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-14 12:54:14,208 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-14 12:54:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:14,208 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-14 12:54:14,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-14 12:54:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:14,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:14,209 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:14,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:14,417 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-14 12:54:14,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:14,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277481124] [2020-09-14 12:54:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:14,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277481124] [2020-09-14 12:54:14,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938302331] [2020-09-14 12:54:14,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:14,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:14,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:14,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129288039] [2020-09-14 12:54:14,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:14,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:14,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:14,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:14,861 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-14 12:54:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:15,669 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-14 12:54:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:54:15,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:15,671 INFO L225 Difference]: With dead ends: 129 [2020-09-14 12:54:15,671 INFO L226 Difference]: Without dead ends: 123 [2020-09-14 12:54:15,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:54:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-14 12:54:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-14 12:54:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-14 12:54:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-14 12:54:15,674 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-14 12:54:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:15,674 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-14 12:54:15,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-14 12:54:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:15,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:15,675 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:15,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:15,876 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-14 12:54:15,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:15,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888408437] [2020-09-14 12:54:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:16,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888408437] [2020-09-14 12:54:16,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876357085] [2020-09-14 12:54:16,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:16,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:16,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:16,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:16,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:16,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:16,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658898596] [2020-09-14 12:54:16,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:16,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:16,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:16,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:16,370 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-14 12:54:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:17,282 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-14 12:54:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:54:17,283 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:17,283 INFO L225 Difference]: With dead ends: 126 [2020-09-14 12:54:17,284 INFO L226 Difference]: Without dead ends: 120 [2020-09-14 12:54:17,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:54:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-14 12:54:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-14 12:54:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:54:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-14 12:54:17,286 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-14 12:54:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:17,287 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-14 12:54:17,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-14 12:54:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:17,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:17,287 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:17,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:17,488 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:17,489 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-14 12:54:17,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:17,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751677277] [2020-09-14 12:54:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:17,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751677277] [2020-09-14 12:54:17,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754147553] [2020-09-14 12:54:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:17,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:17,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:17,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:17,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:17,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749795481] [2020-09-14 12:54:17,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:17,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:17,931 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-14 12:54:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:18,818 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-14 12:54:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:54:18,819 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:18,820 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:54:18,820 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:54:18,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:54:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:54:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-14 12:54:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:54:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-14 12:54:18,822 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-14 12:54:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:18,822 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-14 12:54:18,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-14 12:54:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:18,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:18,823 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:19,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-14 12:54:19,024 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-14 12:54:19,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:19,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118106518] [2020-09-14 12:54:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:19,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118106518] [2020-09-14 12:54:19,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247468161] [2020-09-14 12:54:19,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:19,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:19,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:19,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:19,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:19,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509963071] [2020-09-14 12:54:19,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:19,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:19,494 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-14 12:54:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:20,514 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-14 12:54:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:54:20,515 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:20,516 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:54:20,516 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:54:20,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:54:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:54:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-14 12:54:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:54:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-14 12:54:20,518 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-14 12:54:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:20,518 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-14 12:54:20,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-14 12:54:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:20,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:20,519 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:20,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-14 12:54:20,720 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:20,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-14 12:54:20,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:20,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053579744] [2020-09-14 12:54:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:21,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053579744] [2020-09-14 12:54:21,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426820843] [2020-09-14 12:54:21,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:21,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:21,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:21,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:21,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:21,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:21,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:21,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378377308] [2020-09-14 12:54:21,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:21,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:21,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:21,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:21,145 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-14 12:54:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:22,067 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-14 12:54:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:54:22,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:22,069 INFO L225 Difference]: With dead ends: 125 [2020-09-14 12:54:22,069 INFO L226 Difference]: Without dead ends: 119 [2020-09-14 12:54:22,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:54:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-14 12:54:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-14 12:54:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:54:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-14 12:54:22,071 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-14 12:54:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:22,071 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-14 12:54:22,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-14 12:54:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:22,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:22,072 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:22,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-14 12:54:22,273 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-14 12:54:22,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:22,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506607618] [2020-09-14 12:54:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:22,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506607618] [2020-09-14 12:54:22,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229408969] [2020-09-14 12:54:22,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:22,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:22,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:22,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:22,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:22,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:22,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:22,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:22,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485664028] [2020-09-14 12:54:22,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:22,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:22,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:22,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:22,734 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-14 12:54:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:23,841 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-14 12:54:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:54:23,842 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:23,842 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:54:23,843 INFO L226 Difference]: Without dead ends: 116 [2020-09-14 12:54:23,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:54:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-14 12:54:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-14 12:54:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:54:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-14 12:54:23,845 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-14 12:54:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:23,845 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-14 12:54:23,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-14 12:54:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:23,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:23,846 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:24,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-14 12:54:24,047 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:24,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-14 12:54:24,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:24,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951099285] [2020-09-14 12:54:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:24,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951099285] [2020-09-14 12:54:24,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244175304] [2020-09-14 12:54:24,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:24,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:24,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:24,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:24,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316661820] [2020-09-14 12:54:24,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:24,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:24,442 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-14 12:54:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:25,471 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-14 12:54:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:54:25,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:25,473 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:54:25,473 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:54:25,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:54:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:54:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-14 12:54:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:54:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-14 12:54:25,476 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-14 12:54:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:25,476 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-14 12:54:25,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-14 12:54:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:25,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:25,476 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:25,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:25,677 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-14 12:54:25,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:25,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133080215] [2020-09-14 12:54:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:26,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133080215] [2020-09-14 12:54:26,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462742973] [2020-09-14 12:54:26,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:26,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:26,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:26,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:26,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:26,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:26,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222749769] [2020-09-14 12:54:26,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:26,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:26,117 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-14 12:54:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:27,358 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-14 12:54:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:54:27,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:27,360 INFO L225 Difference]: With dead ends: 120 [2020-09-14 12:54:27,360 INFO L226 Difference]: Without dead ends: 114 [2020-09-14 12:54:27,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:54:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-14 12:54:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-14 12:54:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-14 12:54:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-14 12:54:27,363 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-14 12:54:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:27,363 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-14 12:54:27,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-14 12:54:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:27,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:27,364 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:27,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:27,565 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-14 12:54:27,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:27,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57156423] [2020-09-14 12:54:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:27,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57156423] [2020-09-14 12:54:27,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709928756] [2020-09-14 12:54:27,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:27,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:27,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:27,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:27,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:27,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:27,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:27,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130884358] [2020-09-14 12:54:27,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:27,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:27,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:27,981 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-14 12:54:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:29,102 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-14 12:54:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:29,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:29,104 INFO L225 Difference]: With dead ends: 121 [2020-09-14 12:54:29,104 INFO L226 Difference]: Without dead ends: 115 [2020-09-14 12:54:29,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:54:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-14 12:54:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-14 12:54:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:54:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:54:29,107 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-14 12:54:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:29,107 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:54:29,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:54:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:29,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:29,108 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:29,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-14 12:54:29,309 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-14 12:54:29,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:29,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867460053] [2020-09-14 12:54:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:29,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867460053] [2020-09-14 12:54:29,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38844216] [2020-09-14 12:54:29,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:29,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:29,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:29,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:29,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:29,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:29,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890015959] [2020-09-14 12:54:29,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:29,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:29,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:29,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:29,734 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-14 12:54:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:31,046 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-14 12:54:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:54:31,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:31,048 INFO L225 Difference]: With dead ends: 118 [2020-09-14 12:54:31,048 INFO L226 Difference]: Without dead ends: 112 [2020-09-14 12:54:31,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-14 12:54:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-14 12:54:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-14 12:54:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:54:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:54:31,051 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-14 12:54:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:31,051 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:54:31,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:54:31,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:31,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:31,052 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:31,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:31,252 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-14 12:54:31,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:31,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108330076] [2020-09-14 12:54:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:31,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108330076] [2020-09-14 12:54:31,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340499543] [2020-09-14 12:54:31,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:31,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:31,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:31,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:31,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:31,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:31,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877477556] [2020-09-14 12:54:31,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:31,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:31,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:31,664 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-14 12:54:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:32,856 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-14 12:54:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-14 12:54:32,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:32,858 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:54:32,858 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:54:32,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:54:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:54:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-14 12:54:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-14 12:54:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-14 12:54:32,862 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-14 12:54:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:32,862 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-14 12:54:32,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-14 12:54:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:32,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:32,862 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:33,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:33,063 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:33,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-14 12:54:33,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:33,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520742664] [2020-09-14 12:54:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:33,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520742664] [2020-09-14 12:54:33,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558291032] [2020-09-14 12:54:33,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:33,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:33,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:33,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:33,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:33,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:33,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:33,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135215138] [2020-09-14 12:54:33,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:33,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:33,513 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-14 12:54:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:34,958 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-14 12:54:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:54:34,959 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:34,960 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:54:34,960 INFO L226 Difference]: Without dead ends: 110 [2020-09-14 12:54:34,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:54:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-14 12:54:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-14 12:54:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:54:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-14 12:54:34,962 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-14 12:54:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:34,962 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-14 12:54:34,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-14 12:54:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:34,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:34,963 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:35,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:35,163 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-14 12:54:35,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:35,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299427565] [2020-09-14 12:54:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299427565] [2020-09-14 12:54:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975495115] [2020-09-14 12:54:35,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:35,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:35,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:35,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:35,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767242657] [2020-09-14 12:54:35,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:35,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:35,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:35,572 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-14 12:54:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:36,813 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-14 12:54:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:54:36,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:36,815 INFO L225 Difference]: With dead ends: 136 [2020-09-14 12:54:36,815 INFO L226 Difference]: Without dead ends: 130 [2020-09-14 12:54:36,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-14 12:54:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-14 12:54:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-14 12:54:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:54:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-14 12:54:36,818 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-14 12:54:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:36,818 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-14 12:54:36,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-14 12:54:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:36,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:36,819 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:37,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:37,028 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-14 12:54:37,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:37,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907129404] [2020-09-14 12:54:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:37,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907129404] [2020-09-14 12:54:37,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352580389] [2020-09-14 12:54:37,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:37,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:37,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:37,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:37,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:37,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299922026] [2020-09-14 12:54:37,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:37,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:37,464 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-14 12:54:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:38,978 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-14 12:54:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-14 12:54:38,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:38,980 INFO L225 Difference]: With dead ends: 117 [2020-09-14 12:54:38,980 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:54:38,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-14 12:54:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:54:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-14 12:54:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-14 12:54:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-14 12:54:38,983 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-14 12:54:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:38,983 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-14 12:54:38,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-14 12:54:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:38,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:38,984 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:39,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:39,184 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-14 12:54:39,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:39,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993188643] [2020-09-14 12:54:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:39,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993188643] [2020-09-14 12:54:39,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558691305] [2020-09-14 12:54:39,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:39,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:39,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:39,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:39,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:39,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:39,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724699778] [2020-09-14 12:54:39,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:39,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:39,700 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-14 12:54:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:40,433 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-14 12:54:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:54:40,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:40,435 INFO L225 Difference]: With dead ends: 134 [2020-09-14 12:54:40,435 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:54:40,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:54:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:54:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-14 12:54:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:40,437 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:40,438 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:40,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:40,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:40,438 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:40,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-14 12:54:40,639 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-14 12:54:40,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:40,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330125869] [2020-09-14 12:54:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:41,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330125869] [2020-09-14 12:54:41,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537348403] [2020-09-14 12:54:41,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:41,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:41,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:41,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:41,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:41,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:41,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:41,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147085455] [2020-09-14 12:54:41,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:41,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:41,199 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:42,061 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-14 12:54:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:54:42,062 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:42,062 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:54:42,063 INFO L226 Difference]: Without dead ends: 125 [2020-09-14 12:54:42,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:54:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-14 12:54:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-14 12:54:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:42,066 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:42,066 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:42,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:42,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:42,066 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:42,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-14 12:54:42,267 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:42,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-14 12:54:42,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:42,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173669145] [2020-09-14 12:54:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:42,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173669145] [2020-09-14 12:54:42,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724649668] [2020-09-14 12:54:42,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:42,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:42,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:42,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:42,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:42,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:42,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040569160] [2020-09-14 12:54:42,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:42,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:42,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:42,774 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:43,583 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-14 12:54:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:54:43,584 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:43,584 INFO L225 Difference]: With dead ends: 128 [2020-09-14 12:54:43,585 INFO L226 Difference]: Without dead ends: 122 [2020-09-14 12:54:43,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:54:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-14 12:54:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-14 12:54:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:43,587 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:43,587 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:43,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:43,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:43,588 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:43,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:43,789 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-14 12:54:43,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:43,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059753065] [2020-09-14 12:54:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:44,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059753065] [2020-09-14 12:54:44,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484746844] [2020-09-14 12:54:44,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:44,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:44,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:44,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:44,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:44,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:44,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511075937] [2020-09-14 12:54:44,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:44,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:44,317 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:45,273 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-14 12:54:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:54:45,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:45,275 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:54:45,275 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:54:45,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:54:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:54:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-14 12:54:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:45,278 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:45,279 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:45,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:45,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:45,279 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:45,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-14 12:54:45,480 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-14 12:54:45,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:45,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080487687] [2020-09-14 12:54:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:45,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080487687] [2020-09-14 12:54:45,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158435797] [2020-09-14 12:54:45,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:45,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:45,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:45,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:45,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085847061] [2020-09-14 12:54:45,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:45,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:45,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:45,969 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:46,872 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-14 12:54:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:54:46,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:46,874 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:54:46,874 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:54:46,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:54:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:54:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-14 12:54:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:46,877 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:46,877 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:46,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:46,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:46,878 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:47,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:47,079 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-14 12:54:47,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:47,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220117793] [2020-09-14 12:54:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:47,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220117793] [2020-09-14 12:54:47,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232276325] [2020-09-14 12:54:47,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:47,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:47,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:47,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:47,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:47,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989735557] [2020-09-14 12:54:47,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:47,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:47,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:47,595 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:48,648 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-14 12:54:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:54:48,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:48,649 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:54:48,650 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:54:48,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:54:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:54:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-14 12:54:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:48,652 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:48,652 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:48,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:48,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:48,653 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:48,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:48,854 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-14 12:54:48,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:48,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910316762] [2020-09-14 12:54:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:49,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910316762] [2020-09-14 12:54:49,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181882067] [2020-09-14 12:54:49,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:49,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:49,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:49,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:49,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085158081] [2020-09-14 12:54:49,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:49,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:49,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:49,319 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:50,302 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-14 12:54:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:54:50,303 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:50,304 INFO L225 Difference]: With dead ends: 120 [2020-09-14 12:54:50,304 INFO L226 Difference]: Without dead ends: 114 [2020-09-14 12:54:50,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:54:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-14 12:54:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-14 12:54:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:50,307 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:50,307 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:50,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:50,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:50,308 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:50,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:50,508 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-14 12:54:50,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:50,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200759657] [2020-09-14 12:54:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:50,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200759657] [2020-09-14 12:54:50,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216940888] [2020-09-14 12:54:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:50,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:50,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:51,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:51,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:51,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287928200] [2020-09-14 12:54:51,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:51,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:51,003 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:52,225 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-14 12:54:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:54:52,226 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:52,227 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:54:52,227 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:54:52,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:54:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:54:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-14 12:54:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:52,231 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:52,231 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:52,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:52,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:52,232 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:52,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:52,440 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-14 12:54:52,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:52,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515933014] [2020-09-14 12:54:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:52,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515933014] [2020-09-14 12:54:52,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234019538] [2020-09-14 12:54:52,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:52,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:52,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:52,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:52,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:52,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264569402] [2020-09-14 12:54:52,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:52,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:52,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:52,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:52,901 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:53,964 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-14 12:54:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:54:53,965 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:53,966 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:54:53,966 INFO L226 Difference]: Without dead ends: 110 [2020-09-14 12:54:53,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:54:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-14 12:54:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-14 12:54:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:53,969 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:53,969 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:53,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:53,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:53,970 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:54,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-14 12:54:54,170 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-14 12:54:54,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:54,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913967486] [2020-09-14 12:54:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:54,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913967486] [2020-09-14 12:54:54,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361166823] [2020-09-14 12:54:54,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:54,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:54,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:54,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:54,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:54,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:54,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735008517] [2020-09-14 12:54:54,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:54,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:54,658 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:56,018 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-14 12:54:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:54:56,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:56,019 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:54:56,019 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:54:56,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:54:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:54:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-14 12:54:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:56,022 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:56,022 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:56,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:56,022 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:56,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:56,023 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:56,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:56,231 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-14 12:54:56,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:56,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125205381] [2020-09-14 12:54:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:56,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125205381] [2020-09-14 12:54:56,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185805870] [2020-09-14 12:54:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:56,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:56,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:56,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487400736] [2020-09-14 12:54:56,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:56,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:56,678 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:57,861 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-14 12:54:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:54:57,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:57,863 INFO L225 Difference]: With dead ends: 112 [2020-09-14 12:54:57,863 INFO L226 Difference]: Without dead ends: 106 [2020-09-14 12:54:57,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:54:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-14 12:54:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-14 12:54:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:57,865 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:57,866 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:57,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:57,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:57,866 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:58,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-14 12:54:58,067 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-14 12:54:58,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:58,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524096606] [2020-09-14 12:54:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:58,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524096606] [2020-09-14 12:54:58,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513859601] [2020-09-14 12:54:58,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:58,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:58,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:58,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:58,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:58,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224632646] [2020-09-14 12:54:58,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:58,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:58,550 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:55:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:00,021 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-14 12:55:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:55:00,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:00,023 INFO L225 Difference]: With dead ends: 111 [2020-09-14 12:55:00,023 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:55:00,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:55:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:55:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-14 12:55:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:55:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:55:00,026 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:55:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:00,026 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:55:00,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:55:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:00,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:00,027 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:00,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-14 12:55:00,228 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-14 12:55:00,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:00,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276561798] [2020-09-14 12:55:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:00,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276561798] [2020-09-14 12:55:00,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142123787] [2020-09-14 12:55:00,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:00,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:55:00,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:00,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:00,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:00,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:00,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:55:00,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420088473] [2020-09-14 12:55:00,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:55:00,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:55:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:55:00,676 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:55:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:01,926 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-14 12:55:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:55:01,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:55:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:01,928 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:55:01,928 INFO L226 Difference]: Without dead ends: 102 [2020-09-14 12:55:01,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-14 12:55:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-14 12:55:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-14 12:55:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:55:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:55:01,930 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:55:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:01,930 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:55:01,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:55:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:55:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:01,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:01,930 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:02,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:02,132 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-14 12:55:02,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:02,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929671059] [2020-09-14 12:55:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:02,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929671059] [2020-09-14 12:55:02,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794563121] [2020-09-14 12:55:02,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:02,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:02,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:02,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:02,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:02,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:55:02,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173084174] [2020-09-14 12:55:02,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:02,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:02,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:02,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:02,619 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:55:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:04,221 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-14 12:55:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:55:04,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:04,222 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:55:04,223 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:55:04,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-14 12:55:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:55:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-14 12:55:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:55:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:55:04,225 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:55:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:04,226 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:55:04,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:55:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:04,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:04,226 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:04,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:04,433 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:04,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-14 12:55:04,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:04,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353598191] [2020-09-14 12:55:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:04,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353598191] [2020-09-14 12:55:04,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601719081] [2020-09-14 12:55:04,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:04,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:55:04,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:04,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:04,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:04,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:04,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:55:04,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899855702] [2020-09-14 12:55:04,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:55:04,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:55:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:55:04,898 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:55:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:06,237 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-14 12:55:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-14 12:55:06,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:55:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:06,239 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:55:06,239 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:55:06,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:55:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:55:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-14 12:55:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:55:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:55:06,242 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:55:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:06,242 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:55:06,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:55:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:55:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:06,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:06,243 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:06,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:06,444 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:06,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-14 12:55:06,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:06,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541569571] [2020-09-14 12:55:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:06,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541569571] [2020-09-14 12:55:06,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721205013] [2020-09-14 12:55:06,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:06,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:55:06,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:06,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:06,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:06,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:06,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:55:06,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141495937] [2020-09-14 12:55:06,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:06,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:06,925 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:55:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:08,676 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-14 12:55:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-14 12:55:08,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:08,678 INFO L225 Difference]: With dead ends: 103 [2020-09-14 12:55:08,678 INFO L226 Difference]: Without dead ends: 97 [2020-09-14 12:55:08,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-14 12:55:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-14 12:55:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-14 12:55:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:55:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:55:08,682 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:55:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:08,682 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:55:08,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:55:08,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:08,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:08,683 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:08,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-14 12:55:08,891 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:08,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-14 12:55:08,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:08,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270665306] [2020-09-14 12:55:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:09,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270665306] [2020-09-14 12:55:09,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600664404] [2020-09-14 12:55:09,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:09,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:09,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:09,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:55:09,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76040932] [2020-09-14 12:55:09,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:55:09,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:09,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:55:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:55:09,332 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:55:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:10,730 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-14 12:55:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:10,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:55:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:10,732 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:55:10,732 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:55:10,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-14 12:55:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:55:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-14 12:55:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-14 12:55:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-14 12:55:10,735 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-14 12:55:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:10,736 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-14 12:55:10,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:55:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-14 12:55:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:10,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:10,736 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:10,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:10,937 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:10,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:10,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-14 12:55:10,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:10,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253265125] [2020-09-14 12:55:10,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:11,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253265125] [2020-09-14 12:55:11,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464765576] [2020-09-14 12:55:11,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:11,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:11,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:11,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:11,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:11,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:55:11,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369745278] [2020-09-14 12:55:11,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:11,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:11,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:11,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:11,416 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-14 12:55:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:13,203 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-14 12:55:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-14 12:55:13,204 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:13,204 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:55:13,204 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:55:13,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-14 12:55:13,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:55:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-14 12:55:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-14 12:55:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-14 12:55:13,206 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-14 12:55:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:13,206 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-14 12:55:13,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-14 12:55:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:13,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:13,207 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:13,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:13,408 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-14 12:55:13,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:13,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52109862] [2020-09-14 12:55:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:13,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52109862] [2020-09-14 12:55:13,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594402279] [2020-09-14 12:55:13,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:13,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:55:13,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:13,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:55:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:13,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:13,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:55:13,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812559313] [2020-09-14 12:55:13,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:13,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:13,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:13,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:13,902 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-14 12:55:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:15,590 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-14 12:55:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:15,591 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:15,591 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:55:15,591 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:55:15,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-14 12:55:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:55:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-14 12:55:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:55:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-14 12:55:15,593 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-14 12:55:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:15,593 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-14 12:55:15,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-14 12:55:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:15,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:15,594 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:15,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:15,795 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-14 12:55:15,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:15,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226310325] [2020-09-14 12:55:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:16,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226310325] [2020-09-14 12:55:16,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746575762] [2020-09-14 12:55:16,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:16,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:16,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:16,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:16,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:55:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:16,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:16,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:16,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916553288] [2020-09-14 12:55:16,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:16,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:16,308 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-14 12:55:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:18,093 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-14 12:55:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:18,094 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:18,094 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:55:18,094 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:55:18,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-14 12:55:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:55:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-14 12:55:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:55:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-14 12:55:18,097 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-14 12:55:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:18,098 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-14 12:55:18,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-14 12:55:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:18,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:18,098 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:18,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:18,304 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-14 12:55:18,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:18,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404835618] [2020-09-14 12:55:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:18,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404835618] [2020-09-14 12:55:18,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577471817] [2020-09-14 12:55:18,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:18,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:18,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:18,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:18,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:18,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:18,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:18,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883927288] [2020-09-14 12:55:18,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:18,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:18,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:18,886 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-14 12:55:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:19,605 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-14 12:55:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:55:19,606 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:19,607 INFO L225 Difference]: With dead ends: 102 [2020-09-14 12:55:19,607 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:55:19,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:55:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:55:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-14 12:55:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:55:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-14 12:55:19,610 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-14 12:55:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:19,610 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-14 12:55:19,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-14 12:55:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:19,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:19,611 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:19,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-14 12:55:19,811 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-14 12:55:19,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:19,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032349892] [2020-09-14 12:55:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:20,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032349892] [2020-09-14 12:55:20,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218232289] [2020-09-14 12:55:20,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:20,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:20,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:20,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:20,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:20,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438071624] [2020-09-14 12:55:20,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:20,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:20,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:20,421 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-14 12:55:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:21,257 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-14 12:55:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:55:21,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:21,259 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:55:21,259 INFO L226 Difference]: Without dead ends: 116 [2020-09-14 12:55:21,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:55:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-14 12:55:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-14 12:55:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:55:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-14 12:55:21,262 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-14 12:55:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:21,263 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-14 12:55:21,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-14 12:55:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:21,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:21,263 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:21,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-14 12:55:21,464 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-14 12:55:21,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:21,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279665338] [2020-09-14 12:55:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:21,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279665338] [2020-09-14 12:55:21,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061446158] [2020-09-14 12:55:21,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:22,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:22,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:22,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945979816] [2020-09-14 12:55:22,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:22,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:22,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:22,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:22,031 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-14 12:55:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:22,900 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-14 12:55:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:55:22,901 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:22,902 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:55:22,902 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:55:22,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:55:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:55:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-14 12:55:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:55:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-14 12:55:22,905 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-14 12:55:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:22,905 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-14 12:55:22,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-14 12:55:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:22,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:22,905 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:23,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-14 12:55:23,106 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-14 12:55:23,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:23,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560223426] [2020-09-14 12:55:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:23,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560223426] [2020-09-14 12:55:23,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517731449] [2020-09-14 12:55:23,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:23,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:23,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:23,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:23,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:23,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369766829] [2020-09-14 12:55:23,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:23,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:23,707 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-14 12:55:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:24,668 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-14 12:55:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:55:24,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:24,670 INFO L225 Difference]: With dead ends: 139 [2020-09-14 12:55:24,670 INFO L226 Difference]: Without dead ends: 133 [2020-09-14 12:55:24,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:55:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-14 12:55:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-14 12:55:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:55:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-14 12:55:24,675 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-14 12:55:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:24,675 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-14 12:55:24,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-14 12:55:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:24,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:24,676 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:24,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-14 12:55:24,885 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-14 12:55:24,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:24,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837335681] [2020-09-14 12:55:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:25,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837335681] [2020-09-14 12:55:25,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442643237] [2020-09-14 12:55:25,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:25,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:55:25,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:25,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:25,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:25,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196843956] [2020-09-14 12:55:25,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:25,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:25,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:25,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:25,426 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-14 12:55:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:26,418 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-14 12:55:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:55:26,420 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:26,420 INFO L225 Difference]: With dead ends: 139 [2020-09-14 12:55:26,421 INFO L226 Difference]: Without dead ends: 133 [2020-09-14 12:55:26,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:55:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-14 12:55:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-14 12:55:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:55:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-14 12:55:26,424 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-14 12:55:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:26,424 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-14 12:55:26,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-14 12:55:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:26,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:26,425 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:26,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:26,626 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-14 12:55:26,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:26,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409568172] [2020-09-14 12:55:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:27,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409568172] [2020-09-14 12:55:27,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660691452] [2020-09-14 12:55:27,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:27,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:27,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:27,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:27,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:27,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726340541] [2020-09-14 12:55:27,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:27,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:27,189 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-14 12:55:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:28,310 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-14 12:55:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:55:28,311 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:28,312 INFO L225 Difference]: With dead ends: 136 [2020-09-14 12:55:28,312 INFO L226 Difference]: Without dead ends: 130 [2020-09-14 12:55:28,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:55:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-14 12:55:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-14 12:55:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:55:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-14 12:55:28,315 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-14 12:55:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:28,315 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-14 12:55:28,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-14 12:55:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:28,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:28,316 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:28,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-14 12:55:28,517 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-14 12:55:28,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:28,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043315216] [2020-09-14 12:55:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:28,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043315216] [2020-09-14 12:55:28,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227008900] [2020-09-14 12:55:28,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:29,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:29,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:29,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:29,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:29,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:29,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:29,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069417144] [2020-09-14 12:55:29,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:29,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:29,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:29,041 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-14 12:55:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:30,104 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-14 12:55:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:55:30,105 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:30,106 INFO L225 Difference]: With dead ends: 137 [2020-09-14 12:55:30,106 INFO L226 Difference]: Without dead ends: 131 [2020-09-14 12:55:30,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:55:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-14 12:55:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-14 12:55:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:55:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-14 12:55:30,109 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-14 12:55:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:30,109 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-14 12:55:30,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-14 12:55:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:30,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:30,110 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:30,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:30,311 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-14 12:55:30,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:30,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815402839] [2020-09-14 12:55:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:30,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815402839] [2020-09-14 12:55:30,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463880563] [2020-09-14 12:55:30,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:30,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:30,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:30,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:30,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:30,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:30,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:30,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99610123] [2020-09-14 12:55:30,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:30,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:30,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:30,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:30,881 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-14 12:55:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:32,099 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-14 12:55:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:55:32,100 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:32,101 INFO L225 Difference]: With dead ends: 134 [2020-09-14 12:55:32,101 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:55:32,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:55:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:55:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-14 12:55:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-14 12:55:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-14 12:55:32,103 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-14 12:55:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:32,103 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-14 12:55:32,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-14 12:55:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:32,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:32,104 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:32,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-14 12:55:32,308 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-14 12:55:32,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:32,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013661575] [2020-09-14 12:55:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:32,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013661575] [2020-09-14 12:55:32,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750908589] [2020-09-14 12:55:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:32,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:32,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:32,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:32,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187849636] [2020-09-14 12:55:32,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:32,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:32,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:32,826 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-14 12:55:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:33,986 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-14 12:55:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:55:33,987 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:33,988 INFO L225 Difference]: With dead ends: 135 [2020-09-14 12:55:33,988 INFO L226 Difference]: Without dead ends: 129 [2020-09-14 12:55:33,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:55:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-14 12:55:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-14 12:55:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:55:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-14 12:55:33,991 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-14 12:55:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:33,991 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-14 12:55:33,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-14 12:55:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:33,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:33,992 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:34,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:34,192 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-14 12:55:34,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:34,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434936268] [2020-09-14 12:55:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:34,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434936268] [2020-09-14 12:55:34,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691372700] [2020-09-14 12:55:34,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:34,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:34,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:34,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:34,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:34,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:34,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:34,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621129871] [2020-09-14 12:55:34,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:34,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:34,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:34,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:34,754 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-14 12:55:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:36,101 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-14 12:55:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:55:36,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:36,103 INFO L225 Difference]: With dead ends: 132 [2020-09-14 12:55:36,103 INFO L226 Difference]: Without dead ends: 126 [2020-09-14 12:55:36,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-14 12:55:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-14 12:55:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-14 12:55:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:55:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-14 12:55:36,106 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-14 12:55:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:36,106 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-14 12:55:36,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-14 12:55:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:36,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:36,107 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:36,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:36,308 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-14 12:55:36,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:36,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865016304] [2020-09-14 12:55:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:36,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865016304] [2020-09-14 12:55:36,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303448642] [2020-09-14 12:55:36,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:36,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:55:36,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:36,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:36,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:36,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:36,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:36,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582717921] [2020-09-14 12:55:36,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:36,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:36,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:36,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:36,816 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-14 12:55:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:38,054 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-14 12:55:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:55:38,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:38,056 INFO L225 Difference]: With dead ends: 133 [2020-09-14 12:55:38,056 INFO L226 Difference]: Without dead ends: 127 [2020-09-14 12:55:38,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:55:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-14 12:55:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-14 12:55:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-14 12:55:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-14 12:55:38,058 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-14 12:55:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:38,059 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-14 12:55:38,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-14 12:55:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:38,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:38,059 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:38,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:38,260 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:38,260 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-14 12:55:38,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:38,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171440219] [2020-09-14 12:55:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:38,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171440219] [2020-09-14 12:55:38,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967274478] [2020-09-14 12:55:38,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:38,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:38,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:38,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:38,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:38,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419826384] [2020-09-14 12:55:38,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:38,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:38,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:38,790 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-14 12:55:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:40,268 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-14 12:55:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:55:40,271 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:40,271 INFO L225 Difference]: With dead ends: 130 [2020-09-14 12:55:40,271 INFO L226 Difference]: Without dead ends: 124 [2020-09-14 12:55:40,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:55:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-14 12:55:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-14 12:55:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:55:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-14 12:55:40,273 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-14 12:55:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:40,273 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-14 12:55:40,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-14 12:55:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:40,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:40,274 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:40,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:40,475 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-14 12:55:40,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:40,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012167693] [2020-09-14 12:55:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:40,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012167693] [2020-09-14 12:55:40,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454753300] [2020-09-14 12:55:40,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:40,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:40,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:40,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:40,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:40,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:40,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279220119] [2020-09-14 12:55:40,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:40,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:40,974 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-14 12:55:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:42,298 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-14 12:55:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-14 12:55:42,299 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:42,300 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:55:42,300 INFO L226 Difference]: Without dead ends: 125 [2020-09-14 12:55:42,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-14 12:55:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-14 12:55:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-14 12:55:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-14 12:55:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-14 12:55:42,303 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-14 12:55:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:42,303 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-14 12:55:42,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-14 12:55:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:42,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:42,310 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:42,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-14 12:55:42,519 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-14 12:55:42,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:42,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705333288] [2020-09-14 12:55:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:42,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705333288] [2020-09-14 12:55:42,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723801200] [2020-09-14 12:55:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:42,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:43,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:43,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:43,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:43,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570308031] [2020-09-14 12:55:43,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:43,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:43,033 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-14 12:55:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:44,654 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-14 12:55:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:55:44,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:44,656 INFO L225 Difference]: With dead ends: 128 [2020-09-14 12:55:44,656 INFO L226 Difference]: Without dead ends: 122 [2020-09-14 12:55:44,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-14 12:55:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-14 12:55:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-14 12:55:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-14 12:55:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-14 12:55:44,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-14 12:55:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:44,659 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-14 12:55:44,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-14 12:55:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:44,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:44,660 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:44,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-14 12:55:44,861 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-14 12:55:44,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:44,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901481671] [2020-09-14 12:55:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:45,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901481671] [2020-09-14 12:55:45,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676501822] [2020-09-14 12:55:45,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:45,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:45,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:45,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149260190] [2020-09-14 12:55:45,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:45,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:45,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:45,355 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-14 12:55:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:46,775 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-14 12:55:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:46,776 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:46,777 INFO L225 Difference]: With dead ends: 129 [2020-09-14 12:55:46,777 INFO L226 Difference]: Without dead ends: 123 [2020-09-14 12:55:46,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-14 12:55:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-14 12:55:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-14 12:55:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:55:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:55:46,779 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-14 12:55:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:46,780 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:55:46,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:55:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:46,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:46,780 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:46,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-14 12:55:46,981 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-14 12:55:46,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:46,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156442770] [2020-09-14 12:55:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:47,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156442770] [2020-09-14 12:55:47,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607697517] [2020-09-14 12:55:47,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:47,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:47,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:47,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:47,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465657370] [2020-09-14 12:55:47,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:47,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:47,498 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-14 12:55:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:49,236 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-14 12:55:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-14 12:55:49,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:49,238 INFO L225 Difference]: With dead ends: 126 [2020-09-14 12:55:49,238 INFO L226 Difference]: Without dead ends: 120 [2020-09-14 12:55:49,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-14 12:55:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-14 12:55:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-14 12:55:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:55:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:55:49,241 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-14 12:55:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:49,241 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:55:49,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:55:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:49,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:49,241 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:49,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-14 12:55:49,442 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-14 12:55:49,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:49,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124316102] [2020-09-14 12:55:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:49,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124316102] [2020-09-14 12:55:49,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139942127] [2020-09-14 12:55:49,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:49,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:55:49,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:49,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:49,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:49,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:49,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:49,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286739965] [2020-09-14 12:55:49,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:49,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:49,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:49,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:49,934 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-14 12:55:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:51,457 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-14 12:55:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-14 12:55:51,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:51,459 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:55:51,459 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:55:51,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-14 12:55:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:55:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-14 12:55:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-14 12:55:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-14 12:55:51,462 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-14 12:55:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:51,462 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-14 12:55:51,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-14 12:55:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:51,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:51,463 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:51,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:51,664 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-14 12:55:51,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:51,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428621194] [2020-09-14 12:55:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:52,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428621194] [2020-09-14 12:55:52,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509176986] [2020-09-14 12:55:52,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:52,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:52,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:52,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:52,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:52,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:52,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:52,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:52,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750885378] [2020-09-14 12:55:52,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:52,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:52,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:52,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:52,186 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-14 12:55:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:54,055 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-14 12:55:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-14 12:55:54,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:54,056 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:55:54,056 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:55:54,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-14 12:55:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:55:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-14 12:55:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:55:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-14 12:55:54,058 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-14 12:55:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:54,059 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-14 12:55:54,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-14 12:55:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:54,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:54,060 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:54,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-14 12:55:54,260 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-14 12:55:54,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:54,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803103528] [2020-09-14 12:55:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:54,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803103528] [2020-09-14 12:55:54,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978160249] [2020-09-14 12:55:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:54,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:54,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:54,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:54,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:54,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:54,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117285999] [2020-09-14 12:55:54,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:54,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:54,747 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-14 12:55:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:56,347 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-14 12:55:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-14 12:55:56,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:56,349 INFO L225 Difference]: With dead ends: 144 [2020-09-14 12:55:56,349 INFO L226 Difference]: Without dead ends: 138 [2020-09-14 12:55:56,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-14 12:55:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-14 12:55:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-14 12:55:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-14 12:55:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-14 12:55:56,352 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-14 12:55:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:56,353 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-14 12:55:56,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-14 12:55:56,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:56,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:56,353 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:56,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:56,562 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:56,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-14 12:55:56,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:56,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415426366] [2020-09-14 12:55:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:56,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415426366] [2020-09-14 12:55:56,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704207478] [2020-09-14 12:55:56,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:57,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:57,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:57,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:57,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:57,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:57,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062337642] [2020-09-14 12:55:57,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:57,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:57,093 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-14 12:55:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:59,022 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-14 12:55:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-14 12:55:59,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:59,023 INFO L225 Difference]: With dead ends: 125 [2020-09-14 12:55:59,023 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:55:59,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-14 12:55:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:55:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-14 12:55:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-14 12:55:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-14 12:55:59,026 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-14 12:55:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:59,026 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-14 12:55:59,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-14 12:55:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:55:59,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:59,027 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:59,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-14 12:55:59,228 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-14 12:55:59,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:59,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970281768] [2020-09-14 12:55:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-14 12:55:59,242 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-14 12:55:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-14 12:55:59,262 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-14 12:55:59,294 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-14 12:55:59,294 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-14 12:55:59,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-09-14 12:55:59,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 12:55:59 BasicIcfg [2020-09-14 12:55:59,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-14 12:55:59,377 INFO L168 Benchmark]: Toolchain (without parser) took 284693.07 ms. Allocated memory was 146.3 MB in the beginning and 176.2 MB in the end (delta: 29.9 MB). Free memory was 101.2 MB in the beginning and 104.7 MB in the end (delta: -3.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-09-14 12:55:59,377 INFO L168 Benchmark]: CDTParser took 2.38 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-14 12:55:59,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1002.14 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 100.5 MB in the beginning and 163.1 MB in the end (delta: -62.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-09-14 12:55:59,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.08 ms. Allocated memory is still 202.9 MB. Free memory was 163.1 MB in the beginning and 161.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-14 12:55:59,378 INFO L168 Benchmark]: Boogie Preprocessor took 37.61 ms. Allocated memory is still 202.9 MB. Free memory was 161.1 MB in the beginning and 159.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-14 12:55:59,379 INFO L168 Benchmark]: RCFGBuilder took 551.15 ms. Allocated memory is still 202.9 MB. Free memory was 159.7 MB in the beginning and 139.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-09-14 12:55:59,379 INFO L168 Benchmark]: TraceAbstraction took 283023.22 ms. Allocated memory was 202.9 MB in the beginning and 176.2 MB in the end (delta: -26.7 MB). Free memory was 138.7 MB in the beginning and 104.7 MB in the end (delta: 34.0 MB). Peak memory consumption was 7.3 MB. Max. memory is 7.1 GB. [2020-09-14 12:55:59,381 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.38 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1002.14 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 100.5 MB in the beginning and 163.1 MB in the end (delta: -62.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 68.08 ms. Allocated memory is still 202.9 MB. Free memory was 163.1 MB in the beginning and 161.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.61 ms. Allocated memory is still 202.9 MB. Free memory was 161.1 MB in the beginning and 159.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 551.15 ms. Allocated memory is still 202.9 MB. Free memory was 159.7 MB in the beginning and 139.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283023.22 ms. Allocated memory was 202.9 MB in the beginning and 176.2 MB in the end (delta: -26.7 MB). Free memory was 138.7 MB in the beginning and 104.7 MB in the end (delta: 34.0 MB). Peak memory consumption was 7.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.7s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 282.8s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 161.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 3496 SDtfs, 12305 SDslu, 22147 SDs, 0 SdLazy, 24060 SolverSat, 13833 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11878 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75950 ImplicationChecksByTransitivity, 164.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 218 MinimizatonAttempts, 5507 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.0s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 57.4s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...